Category Archives: mungbeans

Rutherglen bug damage in mungbeans

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RGB-closeup

Although typically only in low numbers in the Northern Grains region, Rutherglen bugs (RGB; Nysius vinitor) were observed at very high densities (e.g. 50 RGB per pod) in many crops last year. A glasshouse study was conducted to determine at what plant stage mungbeans were most susceptible to RGB damage, in terms of both yield and seed quality. To do… Read more »

Phytoplasma and virus problems in soybean and mungbean crops

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A devastating disease was observed in several paddocks of soybean crops in the Branchview area of the Darling Downs in late autumn 2016. Almost 100 percent of plants were affected in some paddocks. The affected plants produced no, or very few filled pods and instead had a proliferation of tiny immature pods as shown in Photos 1 and 2. The plants… Read more »

Bean podborer on the move in mungbeans

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Bean podborer (Maruca vitrata) have been observed in large numbers (>20/m2) in flowering/podding mungbeans planted from January onwards in the Burnett region. They are likely to be present in other coastal/subcoastal regions such as the Burdekin, Callide Valley and the Wide Bay/Burnett (particularly in late-planted crops), and to a lesser extent in the eastern Darling Downs, and Emerald in Central… Read more »

Etiella in mungbeans and soybeans – do we manage the threat or the pest?

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Medium etiella larva (5 mm), with typical pale green colour and pink stripes.

There is an understandable level of concern about how best to manage etiella (Etiella behrii) in summer mungbean crops following the unexpectedly high etiella infestations (and corresponding seed damage and contamination) in spring mungbean crops on the Downs and in Central Queensland and North Western New South Wales. Responding to the etiella threat without reacting prematurely and creating more pest… Read more »

Etiella alert for mungbean on the Darling Downs, Goondiwindi and Northern NSW growing regions

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Etiella moth - 12 mm long

A significant etiella outbreak was recently reported in pod-filling mungbean in the Moree region of North Western NSW. In this particular crop, it is estimated that etiella larvae have infested pods on 50% of plants. Etiella eggs, at low densities, were also recently observed in an early flowering crop near Bungunya (west of Goondiwindi, Qld).

Seedling thrips in spring mungbean crops

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Seedling thrips damage to tri-foliate leaves in  spring mungbean

There have been several reports of seedling thrips in spring mungbean crops in the Goondiwindi region. Seedling thrips (Thrips tabaci) are also known as winter cereal thrips or cotton seedling thrips. The thrips move out of winter cereals when these start to dry off into new green spring growth such as mungbean, navy beans or cotton. Spring planted crops, especially… Read more »

Etiella on the move again

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Background: Significant etiella outbreaks have recently been reported in soybeans and mungbeans on the Darling Downs, in the South Burnett (SE Qld) and in the Moree and NorthernRivers regions of NSW. In some soybean crops on the Downs, 100% of plants were infested and 72% of axilliary buds damaged to varying degrees. These outbreaks are similar but more widespread than… Read more »

Spot the Difference

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Large numbers of different spotted larvae have recently been observed in many mungbean crops. The spotted larvae of the bean pod borer remains a significant pest of mungbeans yet the spotted fungus eating ladybird larvae poses no threat to crops. In recent years, significant populations of bean podborer larvae (Maruca vitrata) have been reported in crops as far west as… Read more »

Podborer pesticides under the spotlight in mungbeans

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Severe and sustained bean podborer (Maruca vitrata) outbreaks were widely reported in mungbeans over the past 2 summers.. Populations in excess of 100 larvae per square metre were observed in many crops. If left uncontrolled such populations not only impact on crop yield by reducing pod set, they also severely damage the pods that are set and delay harvest maturity…. Read more »

Bean podborer harassing mungbeans

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Damaging bean podborer (Maruca vitrata) populations of up to 100+ larvae/m2 have been observed in flowering and podding mungbeans in the South Burnett, Dawson Callide and Central Highlands. Although podborer is not an uncommon pest in these regions during wet summers, very high populations can inflict devastating damage with zero pod set observed in some crops where the pest is… Read more »