Stem fly and disease outbreaks in Queensland soybeans

Since early March 2020, soybean growers in the Burdekin have seen significant damage to their crops. Close inspection of crops found many with soybean stem fly damage as well as leaf spots, and stem and pod lesions. Severely affected plants have suffered complete and rapid leaf defoliation. In many crops, plants did not collapse until the late pod-fill stage, when… Read more »

Are leafhoppers and seedling thrips a threat to summer mungbeans?

Leafhoppers (also known as jassids) and seedling thrips are extremely abundant in Central Queensland this summer. The vegetable leafhoppers (Austroascra viridigrisea) are very much an ‘in your eye’ pest, with swarms of the small (3mm) bright green critters flying up when disturbed in-crop. In contrast, the cotton seedling or cereal thrips (Thrips tabaci) are hiding out of sight, down in… Read more »

A tale of two moths and their larvae: beet webworm and bean podborer in CQ mungbeans

Observations from recent Pulse Check field days in CQ Bean podborer (Maruca vitrata) and beet webworm (Spoladea recurvalis) are on the move in Central Queensland (CQ) mungbean crops. While both species may also be active in other mungbean regions, bean podborer is most likely to occur in coastal (e.g. the Burdekin) and subcoastal (Biloela, Kingaroy) regions. Bean podborer is a… Read more »

Beet webworm moths visit mungbean crops

Beet webworm (Spoladea recurvalis) moths are being seen in huge numbers in mungbean crops at present. The moths are brown with white bands across the wings, and rest with their wings swept back. Those familiar with bean podborer (Maruca vitrata) will see the similarities between the two moths – both small brown moths that move readily when disturbed. At rest,… Read more »

Moths ahoy at Kingaroy!

      No Comments on Moths ahoy at Kingaroy!

A plague of a native geometrid moths (Antictenia punctunculus – no common name) has visited southern Queensland, with huge numbers of moths reported. The species belongs to the twig looper family (Family Geometridae) and occurs in Queensland, New South Wales and the ACT. The moths have a 35-40 mm wingspan and distinctive colour pattern. The adults are a greyish brown… Read more »

Leaf feeding beetle attacking millet

Over the past week, the Queensland Department of Agriculture and Fisheries (DAF) has received a number of enquiries about leaf damage in millet crops. The culprit is a native beetle (Oulema spp.), a member of the chrysomelid (leaf beetles) family. The larvae of the beetle are doing the leaf feeding. They are small, slimy-looking grubs with a hunched appearance. Fun… Read more »

Fall armyworm – should you be concerned?

Fall armyworm (FAW, Spodoptera frugiperda) is an exotic pest that was detected in northern Queensland in a maize crop in February 2020. State and federal biosecurity organisations have determined it to be unfeasible to eradicate this pest and it is now classified as an endemic pest. Originating from tropical and sub-tropical areas of the Americas, FAW was reported in Africa… Read more »

Keeping a close eye on diseases this season

      No Comments on Keeping a close eye on diseases this season

Recent rainfall has led to opportunistic late plantings in some areas. The current high relative humidity may also lead to an increased risk of disease in some crops. Department of Agriculture and Fisheries (DAF) plant pathologists are encouraging Northern Region grain growers to submit disease samples (particularly powdery mildew in mungbeans) for diagnosis as part of effective paddock monitoring and… Read more »

Natural enemies: meet the mealybug destroyer

Cryptolaemus montrouzieri is a ladybird beetle native to Australia that feeds predominately on mealybug and soft scale insects. Identified as an effective biological control agent, it has been exported to many other regions, and is reared commercially for control of a range of mealybug species, particularly in horticultural crops. In cotton crops where solenopsis mealybug (Phenacoccus solenopsis) is present, Cryptolaemus… Read more »