Alfalfa mosaic virus (AMV)

AMV was the most prevalent virus detected in this year’s survey, with 14 out of 15 fields showing moderate to high levels of infection. It was also found at one site in burr medic plants growing next to a chickpea field. AMV is a non-persistent virus, meaning aphids that transmit the virus remain infective for only a short period (a few minutes to a few hours). It is spread by a variety of common aphids, which transfer the virus from seed-infected plants to healthy plants.

Chickpea with AMV (left) and a plant with a more advanced infection (right)

While AMV can be transmitted through seed, the recorded seed transmission rates in chickpea are low (0.1–1%). The virus is commonly found in lucerne and weeds such as burr medic (Medicago polymorpha), common sowthistle (Sonchus oleraceus), clover (Trifolium species) and blackberry nightshade (Solanum nigrum).

Symptoms to look for in chickpea:

• Shoot tip necrosis
• Reddening of leaf edges

Other viruses

Burr medic with AMV and PBMYV

The viruses below are all transmitted persistently by aphids, meaning aphids remain infectious for life after acquiring the virus from an infected host.

Phasey bean mild yellows virus (PBMYV) was detected in 9 fields. The main weed host for PBMYV is phasey bean (Macroptilium lathyroides).

Turnip yellows virus (TuYV) was found in 2 fields, primarily around Dalby. It is transmitted by green peach aphids (Myzus persicae) and has an extensive host range, including wild mustard.

Bean leaf roll virus (BLRV) was detected in just 1 field east of Chinchilla. It is transmitted by several aphid species, with pea aphid (Acyrthosiphon pisum) being the primary vector. BLRV hosts are limited to the Fabaceae (legume) family, including weeds such as clover.

Symptoms of PBMYV, TuYV, and BLRV in chickpeas

The symptoms of these viruses vary depending on the chickpea variety:

• Kabuli chickpeas: Pale, chlorotic leaves and stunting
• Desi chickpeas: Purple-red leaf discolouration

Managing viruses in chickpea crops

Chickpea with AMV and TuYV

Effective management of chickpea viruses relies on reducing the presence of virus host plants and aphids. Key strategies include:

• Controlling weeds and self-sown volunteer crops that can harbour aphids and viruses between cropping seasons.
• Sowing chickpeas into cereal standing stubble to reduce aphid landing rates.
• Removing infected chickpea plants to limit virus spread (ideally after virus testing, as symptoms can resemble other issues such as nutrient deficiencies).
• Monitoring crops regularly to assess aphid levels.

Note, insecticides should only be applied if aphid numbers are high.

Questions or sample submissions?

If you’re seeing symptoms or have concerns about viruses in your crop, contact Fiona Filardo at the Department of Primary Industries (DPI) Queensland:

[07] 37088449
Fiona.filardo@dpi.qld.gov.au

This initiative is part of the GRDC and QLD DPI-funded project DAW2305-Effective virus management in grain crops.

The post Alfalfa mosaic and other viruses detected in Darling Downs chickpeas first appeared on The Beatsheet.

What is BVG and how is it transmitted?

BVG is a Polerovirus that was first reported in South Korea in 2016.

The first identification within Australia was in Victoria in 2018. However, it’s likely not a new disease, as a 34-year-old archived oat sample from Victoria also tested positive for BVG, suggesting it has been present for decades but only recently identified due to advances in diagnostic technologies.

BVG infects barley and oats and to a lesser extent, wheat.

The virus is transmitted by aphids, primarily Rhopalosiphum maidis (corn leaf aphid), which is more prominent in Queensland, and to a lesser extent by Rhopalosiphum padi (bird cherry-oat aphid). These aphids acquire the virus while feeding on infected plants and can spread it across crops.

Corn aphid colony on barley

Symptoms to look for and impact on yield

BVG symptoms can be subtle and inconsistent, making detection challenging. Some infected plants show yellow discolouration of leaf tips and margins, similar to other yellow dwarf virus disease symptoms.

Currently, the epidemiology of BVG and its impact on yield are not well understood, either in Australia or internationally. While the virus has been detected in barley, oats, and wheat, its effect on crop productivity remains unclear.

BVG-infected compared to healthy barley. Source: Anna Erickson, Jun Jiang, Yen-Wen Kuo, Bryce W. Falk (2023). Construction and use of an infectious cDNA clone to identify aphid vectors and susceptible monocot hosts of the polerovirus barley virus G. Virology, 579:178-185. https://doi.org/10.1016/j.virol.2023.01.011

Testing available

If you notice suspicious symptoms or suspect aphid activity, consider sending in samples for testing. Both plant and aphid samples are valuable for understanding the spread of BVG in the region.

Sample collection tips

• Send at least 5cm² of leaf or a whole leaf of plants showing symptoms, and/or
• Collect live aphids attached to a leaf sample or remove them and put them in a sealed bag or container.
• Include paddock location, crop stage, and contact details

Express post is recommended to maintain sample integrity.

Questions or sample submissions?

If you’re seeing symptoms or have concerns, contact Fiona Filardo at the Department of Primary Industries (DPI) Queensland:

[07] 37088449
Fiona.filardo@dpi.qld.gov.au

This forms part of the GRDC and QLD DPI funded project DAW2305-Effective virus management in grain crops.

The post Barley virus G (BVG) found in barley crops across the Darling Downs first appeared on The Beatsheet.

Outbreaks of migratory locusts are currently occurring across quite a few shires in Central Western regions and into Northern Queensland.

See the online map (updated daily) of current sightings and estimated densities.

Migratory locust nymphs

The Department of Primary Industries (DPI) is coordinating a comprehensive response in cooperation with local government, agricultural peak bodies, the Australian Plague Locust Commission, and others.

It is likely nymphs will continue to emerge for weeks to come. Treatment in the nymph stage is the key opportunity for intervention, with each subsequent generation having the potential to increase population numbers exponentially.

Bands of locusts visible from the air

Under the Biosecurity Act 2014, landholders have a general biosecurity obligation (GBO) to control locust populations on their properties. Vigilance and early control intervention are critical to preventing locust populations from reaching plague proportions.

DPI is responsible for coordinating management efforts if populations are beyond the capacity for landholder control and threaten key agricultural regions of Queensland. We will conduct aerial spraying in an environmentally responsible manner to control locust infestations at a nymph stage that are deemed to be a threat to agricultural production. Landholders will be contacted if their property is likely be included in this treatment.

Be on the lookout for locusts

Reporting significant locust or nymph activity is essential, as it enables DPI to monitor locust density and movement across Queensland. Reports are used to inform planning and control efforts, with information provided to local councils to assist with early detection and management strategies.

Reporting options

• Report online or offline (Survey123)
• Report online (Report a biosecurity pest or disease)
• Phone Biosecurity Queensland on 13 25 23
• Email locustreports@dpi.qld.gov.au

Learn more about locusts and their management at the Business Queensland website.

Images © State of Queensland

The post Locust outbreaks in outback Queensland first appeared on The Beatsheet.

Phytophthora root rot causes yellowing in chickpea

Across all regions, growers should also monitor their crops for signs of ascochyta blight and botrytis grey mould. Fresh isolates of the fungal ascochyta blight pathogen, Ascochyta rabiei, are sought after to monitor changes in isolate aggressiveness – contact Lisa Kelly (details below) for more information.

Ascochyta blight causes spots on chickpea leaves, stems and pods

Further information on these diseases:

• Sclerotinia in chickpea (Agriculture Victoria)
• Sclerotinia-impacts-on-chickpea (GRDC)
• Ascochyta online dashboard (AscoDashboard) of submitted samples
• Phytophthora root rot management in chickpea (NSW DPIRD pdf)

If you see disease symptoms in grain crops, please contact plant pathologist Lisa Kelly (lisa.kelly@dpi.qld.gov.au, 0477 747 040) for further information on disease diagnosis and sample collection.

This research has been supported by GRDC project DAQ2407-001RTX.

The post Disease alert: fungal disease in chickpeas first appeared on The Beatsheet.

Starting trap counts for 2025 (highlighted in grey) at Roma and St George are well above the numbers found in previous years.

Continued migration of H. punctigera through spring is likely, if suitable weather systems occur, and it is likely that all susceptible crops (including chickpea, canola, faba bean, spring mungbean and spring sunflower) will experience helicoverpa pressure through September and October.

Helicoverpa punctigera proliferate on native hosts in northern South Australia and far south west Queensland. Near record rainfall in these areas over the past six months, has meant a large source of wildflowers is present in these areas to support widespread high populations of H.   punctigera larvae and moths. With further rainfall forecast over the next three months, it would be expected that breeding of this pest will continue.

Top: Rainfall over the past six months; Bottom: three month forecast from mid-August (source: BOM)

H. punctigera will migrate even when their inland hosts are still in good condition, but their movement from these inland breeding areas to eastern cropping regions requires weather fronts. Typically, these systems are the north-westerly winds that precede the passage of rain-bearing weather and can generate winds capable of carrying the moths long distances.

So what does this mean for me?

Helicoverpa damage to chickpea seed

Continue to monitor susceptible crops even if helicoverpa infestations have already been treated, as high moth activity puts pressure on the residual efficacy of products. Given the expectation of continued La Niña conditions until the end of the year, it is likely that chickpeas will continue to remain attractive to helicoverpa for longer. Large larvae that have been feeding on green terminal growth in a well podded chickpea crop can cause significant damage to maturing pods.

While winter cereals are not a host for H. punctigera, Helicoverpa armigera and armyworm activity is also expected to be high throughout spring, with reports of high armyworm activity already being received.

Management may become challenging as these populations respond differently to insecticides (for example, NPV is effective against H. armigera in winter cereals, but it has no activity against armyworm). Correct identification is therefore essential. Depending on average temperatures, most areas will start to get H. armigera emerging from late August. The graph below from 2019 illustrates a typical season in the Western Downs and Maranoa.

H. armigera pheromone trap catches in 2019

The post Higher than usual numbers of Helicoverpa punctigera moths this month first appeared on The Beatsheet.

What is TuYV and why does it matter?

Green peach aphid is a vector for TuYV

TuYV is a persistent virus that affects canola and other brassica crops. It is transmitted by green peach aphids (GPA, Myzus persicae), that pick up the virus when feeding on infected plants and can then spread it throughout a crop – even if aphid numbers are low.

Because GPA can be present without obvious colonies, infection can occur before growers are even aware of an aphid issue. Once infected, plants remain infected for life.

Symptoms to look for

Purpling and cupping of affected leaves in TuYV infected canola.

Symptoms are often subtle, especially early in the season, but can include:

• Purpling or reddening of older leaves
• Discolored leaves become thick and may cup upwards
• Stunted growth or uneven development
• General loss of vigour
• Fewer flowers and seeds produced.

These symptoms can be easily confused with nutrient deficiencies or environmental stress, so it’s worth getting lab confirmation if you’re unsure.

Impact on yield

If infected early, plants can be stunted with reduced yield.

Early infection can lead to significant yield losses. In southern states, TuYV is considered one of the most damaging viral diseases in canola, with yield losses of up to 75% reported in severe outbreaks.

If plants get infected when they are older (post-flowering) they may show leaf symptoms but are generally less affected in relation to stunting and reduced yields.

Free TuYV testing available now

To support growers this season, free TuYV testing is available for canola plants and aphid samples collected from Queensland paddocks.

If you notice suspicious symptoms or suspect GPA activity, consider sending in samples for testing. Both plant and aphid samples can help build a clearer picture of virus spread across the region.

Sample collection tips

• Send at least 5 cm² of leaf or a whole leaf of plants showing symptoms, and/or
• Collect live aphids attached to a leaf sample or remove them and put them in a sealed bag or container
• Include paddock location, crop stage, and contact details.

Express post is recommended to maintain sample integrity.

Questions or sample submissions?

If you’re seeing symptoms or have concerns about TuYV in your canola crop, contact Fiona Filardo at the Department of Primary Industries (DPI) Queensland:

[07] 37088449    Fiona.Filardo@daf.qld.gov.au

This information and testing form part of the GRDC and QLD DPI-funded project DAW2305 – Effective virus management in grain crops. Photos by Fiona Filardo.

The post Keep an eye out for turnip yellows virus (TuYV) in canola this season first appeared on The Beatsheet.

Late bean fly infestations

Late bean fly damage was recently observed in mungbean crops in the South Burnett. Bean fly damage is more common in coastal and tropical areas, where it is typically is a pest of seedling summer pulse crops, affecting mungbean, navy beans, and black gram (but not soybean). However, it is also not unusual to find infestations during later crop stages, particularly during high-rainfall seasons.

Female bean fly lay their eggs into leaves and the larvae tunnel through leaf tissue, through the petiole, eventually making their way into the plant stem. The damage caused by this feeding includes dead leaves and even plant death in seedling crops.

Bean fly pupa in a mungbean stem. Photo: Trevor Volp.

Management

Bean fly can cause the death of mungbean seedlings. Photo: Hugh Brier.

The most severe crop stage for bean fly infestations is during early vegetative crops, where plant death due to infestations can significantly impact plant populations. The threshold during the seedling stage is 1 larval tunnel per plant. In later vegetative and reproductive stages thresholds are based on leaf damage, with thresholds of 33% leaf damage for vegetative crops, decreasing to 20% leaf damage when plants are flowering, setting and filling pods.

Dimethoate is registered for use against bean fly in summer pulses. Always follow label instructions.

If infestations of bean fly are occurring during later podding stages, such as the ones we’ve recently observed, agronomists must decide whether fly tunnelling in leaves is still capable of causing yield loss. If crops are at the black pod stage, ready for desiccation, it is unlikely a bean fly infestation will affect yield.

It is also worth examining if the infestation is still active. If you are only able to find pupal casings and no bean fly larva remain in the plants, then spraying an insecticide will have no impact on the damage that has already been done.

American serpentine leaf miner

American serpentine leaf miner adult and larva. Photos: Trevor Volp.

In addition to the regular bean fly, in recent years we have seen several invasive leaf mining fly species arrive in Australia that put summer pulse production at risk. These include the American serpentine leaf miner (Liriomyza trifoli), the serpentine leaf miner (L. huidobrensis), and the vegetable leaf miner (L. sativae).

Recently QDPI entomologists have been made aware of American serpentine leaf miner infestations in mungbean on the Darling Downs. The larvae produce obvious mines through leaf tissue, and the damage symptoms are quite distinct from traditional bean fly damage.

American serpentine leaf miner damage symptoms, with a close-up of the mines on the right. Photos: Trevor Volp.

Again, these infestations were during later crop stages where the impact of leaf damage may be limited. There was also substantial parasitoid wasp activity associated with these infestations.

No research has yet been conducted on these exotic Liriomyza spp. pests in mungbean in Australia.

Management

Dimethoate was previously available under permit for the control of Liriomyza leaf miners under APVMA permit PER89184, however this permit lapsed in March 2025.

If growers or agronomists become aware of similar infestations, please alert QDPI entomologists.

For more information contact Trevor Volp (0429 641 912) or Melina Miles (0407 113 306)

Article by Trevor Volp & Melina Miles

The post Recent infestations in mungbean fly under the radar first appeared on The Beatsheet.

Large bean podborer larva (16 mm) in pod

QDPI entomologists have received several recent reports of poor control after spraying bean podborer (Maruca vitrata) in Central Queensland mungbean crops.

A major pest of mungbeans in tropical and subtropical production areas, bean podborer is typically more problematic in coastal cropping regions and can be more difficult to manage than co-occurring Helicoverpa sp. populations.

Infestation pattern and nature of damage

Bean podborer usually occur in mungbean crops from budding onwards, laying eggs on floral buds and flowers, and occasionally on young leaves and growing tips. Freshly laid eggs are oval, flattened, and translucent, making them difficult to detect compared to helicoverpa eggs, which are spherical and white.

Bean podborer eggs (left), compared with newly laid helicoverpa egg (right).

Hatched larvae find their way inside buds and flowers where they begin feeding secretively, making them very difficult to detect with the usual sampling methods (and also control with insecticides). As the larvae develop, they create a webbed mass by weaving buds, flowers, and pods together with their silk.

Webbed racemes indicating entrenched bean podborer caterpillar(s).

Bean podborer larvae are relatively easy to distinguish from other caterpillar pests of mungbean. Early instars are slightly yellowish that changes to a dirty green (sometimes tinged with pink) by 3^rd instar. Visible from the 2^nd instar stage are rows of black spots running along their body that become pale in later instars, as they approach pupation.

Small bean podborer larva feeding inside a flower and a late instar larva feeding inside a pod.

The speed of egg and caterpillar development depends on temperature. Eggs take 3 days to hatch at 25°C but will hatch in 2 days at 30°C. Larval development (neonate to pupation) takes approximately 15 days at 25°C, but can be completed in 8-10 days under warmer conditions.

Effective sampling

Bean podborer moth (25 mm wingspan)

Often one of the first signs of bean podborer is the presence of moths in the crop. They can be spotted during the day sitting on leaves in a very characteristic ‘wings outstretched’ pose.

Closely inspect mungbean racemes for eggs, which are quite difficult to detect. Eggs develop a yellowish tinge and the larval head capsule becomes visible prior to hatching.

Manually inspect buds and flowers for larvae as beat sheeting will significantly underestimate the larvae present. Collect several racemes from different sections of the crop, pry open flowers and buds and count the number of larvae. To roughly estimate the bean podborer population, divide the number of caterpillars detected by the number of racemes sampled, and multiply that value by the estimated number of racemes per square meter to give an estimation of bean podborer larvae per m².

Larvae/m²  =      caterpillars  X  racemes/m²
                                 racemes

The suggested break-even economic threshold is 5-7 larvae per m².

Chemical control

Bean podborer are effectively controlled with chlorantraniliprole (e.g. Vantacor®), as the translaminar activity can kill caterpillars feeding inside flowers. However, it is important to spray bean podborer infestations before the caterpillars form their webbed shelters because the chemical is less likely to reach the larvae inside these webs (and larvae become more tolerant to insecticide as they increase in size).

Chlorantraniliprole is the preferred caterpillar insecticide for many agronomists due to its translaminar activity, low impact on natural enemies, and long residual control. QDPI trials in chickpea have demonstrated up to 3 weeks of residual control for helicoverpa larvae (at the same rate of product), however there is no such data for reproductive mungbean, and growth dilution (from setting new buds/flowers and pod formation) is likely to influence residual effectiveness at these crop stages.

It is also important to note that caterpillars may take several days to die after a chlorantraniliprole spray. However, larvae do stop feeding once they have received an adequate dose of insecticide.

Other products registered for bean podborer management in mungbeans include Warlock® (emamectin benzoate), Skope® (an emamectin benzoate and acetamiprid mixture), and methomyl. Methomyl does not provide residual control and both methomyl and Skope® are very hard on beneficials. Synthetic pyrethroids (deltamethrin, e.g. Ballistic) are not registered for bean podborer in mungbean, and will not provide incidental control if applied to manage other pests as they only give limited control of bean podborer (and they are also very hard on beneficials).

Steward® (indoxacarb; PER87650) may also be used to manage bean podborer in mungbean crops, but it should be used only in the permitted use window on the Helicoverpa armigera Insecticide Resistance Management Strategy.

While there have been reports of bean podborer resistance to older chemistries overseas, the potential for this pest to develop resistance to insecticides in Australian cropping situations is currently unknown.

In case of spray failures

While it is difficult to know what has caused the unexplained control failures of chlorantraniliprole used to manage bean podborer in this season’s mungbean crops, we urge agronomists to:

• Ensure thorough sampling of crops from budding onwards. Keep in mind the pest’s cryptic nature and fast development under warm conditions.
• Follow label instructions for chlorantraniliprole application (40mL/ha plus a non-ionic surfactant @ 125 gai/100L; a minimum of 30L/ha for plane application or 100L/ha for ground rig; and a medium droplet size).
• Re-check crops post-spray to assess for control success/failure. Continue monitoring for new infestations remaining aware of the potential of growth dilution.

For more information contact Trevor Volp (0429 641 912) or Melina Miles (0407 113 306)

Article by Trevor Volp and Melina Miles

The post Bean podborer outbreak in Central Queensland mungbeans first appeared on The Beatsheet.

Initial symptoms are easy to recognise: small whitish, powdery spots on the upper and lower leaf surfaces, usually appearing first in the lower canopy on older leaves. These spots then enlarge, coalesce, and can cover large areas or even the entire surface of infected leaves. Petioles, stems, and green pods may also become infected. If environmental conditions are conducive to the disease, the entire canopy could be covered with intensively sporulating powdery mildew mycelium.

Powdery mildew on mungbean – initial spots, symptoms on pods and whole canopy infection. Photos: Lisa Kelly, DPI

Initial symptoms

Recent research at the University of Southern Queensland (UniSQ) and Queensland Department of Primary Industries (DPI) indicated that the disease could reduce mungbean yields by up to 40% if crops are infected prior to flowering, followed by weather conditions conducive to disease development, and no fungicides are applied.

In contrast, infections that appear after flowering usually do not have a considerable impact on grain yield. Sowing early in summer should allow the crop to reach the green pod stage before powdery mildew becomes widespread in paddocks in most seasons. Early sowing could therefore be the most effective way of managing this disease without using fungicide treatments.

The disease is caused by two powdery mildew species, Podosphaera xanthii and Erysiphe vignae in Australia. These two species are quite different under the microscope but cannot be distinguished based on the symptoms found on mungbean. Both powdery mildews are able to infect a number of other plant species, and some weeds could be sources of infection (in addition to volunteer mungbean and black gram plants).

All powdery mildew fungi require a living plant host to survive. These pathogens will not survive in soil, crop residue, or in seed between cropping seasons, so ensuring good field hygiene is also an essential part of managing this disease between seasons.

Varietal susceptibility

All commercially available mungbean varieties are susceptible to powdery mildew to some extent, so fungicide applications may be needed for powdery mildew management. Jade-AU* and Crystal* are considered moderately susceptible to powdery mildew infection, while Opal-AU* is rated as moderately resistant. Two recently introduced varieties, Green Dragon* and Green Taipan* are also often infected with powdery mildew.

*PBR varieties

Fungicide management

Currently registered or permitted fungicide products for the management of powdery mildew in mungbeans contain 430 g/L tebuconazole (for example, Orius® 430 SC), or a mixture of 222 g/L azoxystrobin and 370 g/L tebuconazole (Veritas® Opti). Tebuconazole is a demethylase inhibitor (DMI) from the Group 3 mode of action (MoA) fungicides; azoxystrobin is a quinone outside inhibitor (Qol) from Group 11.

The conventional recommendation for managing mungbean powdery mildew is to spray fungicide at the first sign of disease followed by a second fungicide treatment two weeks later. Some growers apply a preventive fungicide with their first insecticide spray (before there is any sign of powdery mildew), however replicated field trials have shown that applying fungicide products with two actives belonging to two different modes of actions when powdery mildew is found in the crop, provided better control than preventive sprays.

The PowderyMildewMBM app.

Managing mungbean powdery mildew with fungicides is not always economical.

A Decision Support Tool, the PowderyMildewMBM app, is available from both the Google Play and Apple App Stores to assist with fungicide application decisions. Free and easy to use, the PowderyMildewMBM app calculates the most likely estimates of financial return (if any) from each planned spray. Calculations are based on application costs and expected efficacy (e.g. aerial versus ground sprays); expected yields and grain price; crop stage; and weather forecasts. You can run different scenarios for any paddock and compare the expected monetary returns for one or two sprays, or no spray at all.

The app supports the principle ‘if it doesn’t pay, don’t spray’. Developed based on powdery mildew severity and grain yield data obtained from 16 disease management trials carried out in Queensland and New South Wales from 2011 to 2019, its outputs have been recently supported by an additional seven replicated trials and six demonstration sites in the Darling Downs, South Burnett, and Western Downs regions of Queensland.

The DNA markers of resistance to both tebuconazole and azoxystrobin, the two actives of the fungicide products that are currently available against the disease, have already been detected by UniSQ in mungbean powdery mildew populations sampled in southern Queensland. So, while the available fungicide products still work against this disease, always follow the principles of the Australian Fungicide Resistance Extension Network when applying fungicides to preserve their efficacy as long as possible.

Heavy powdery mildew in an unsprayed plot (left) compared to infection in a plot (right) sprayed twice with a fungicide product with two actives belonging to different mode of action (MoA) groups. Photos: Kirsty Owen, University of Southern Queensland.

Powdery mildew is favoured by cool (20-24ºC), humid weather. The increased humidity due to frequent rain in the current 2025 season may increase the likelihood of powdery mildew infecting crops earlier than expected. Once infected, symptoms can progress quickly. Closely monitor crops for disease and use the DST to assist in fungicide application decisions.

If you would like confirmation of disease identification or pathogen presence, samples can be submitted for diagnostics as part of GRDC-DPI projects.

Further resources

• Hold the spray when it comes to powdery mildew. GroundCover article (May-June 2024)
• Mungbean powdery mildew; fungicide sensitivities and management for Queensland growers. GRDC Podcast (Feb 2024)
• Management of mungbean powdery mildew. GRDC Update Paper (July 2024)

Article by Lisa Kelly (DPI), Levente Kiss (UniSQ), Kirsty Owen (UniSQ), and Neil Robinson (UniSQ). This work has been supported by GRDC within projects USQ2022-001RTX and DAQ2407-001RTX.

The post How to best manage powdery mildew in your mungbeans first appeared on The Beatsheet.

Avoid replanting seed from crops affected with halo blight and tan spot and minimise the spread of these diseases by restricting access and ensuring good farm hygiene. Avoid movement through infected paddocks and thoroughly clean down machinery, vehicles and footwear before entering clean paddocks.

Halo blight affected mungbean plant in a crop growing in southeast Queensland. Photo: L Kelly

Tan spot lesions often start on the edge of mungbean leaves

The photo above shows marginal and interveinal necrosis in a mungbean plant with tan spot.

For more information on halo blight, see the Beatsheet article Is your mungbean seed free of halo blight?.If you see disease symptoms in grain crops, please contact plant pathologist Lisa Kelly (lisa.kelly@daf.qld.gov.au, 0477 747 040) for further information on disease diagnosis.

This research has been supported by GRDC project DAQ2407-001RTX. Photographs by Lisa Kelly.

The post Disease alert: bacterial diseases in mungbean first appeared on The Beatsheet.