Category Archives: soybeans

Soybean moth active again in 2017 in coastal Queensland

Hugh Brier   March 6, 2017   Comments Off on Soybean moth active again in 2017 in coastal Queensland

Major soybean moth outbreaks have recently been reported in some coastal Burnett soybean crops, and lesser outbreaks in crops in the Burdekin. Soybean moth is generally a minor soybean pest but major outbreaks have been reported periodically in all soybean growing regions. In extreme cases, crops can be totally defoliated. Feeding damage Larvae feed mostly within the leaves, making distinctive… Read more »

Phytoplasma and virus problems in soybean and mungbean crops

Murray Sharman   September 6, 2016   Comments Off on Phytoplasma and virus problems in soybean and mungbean crops

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 »

Don’t let lucerne crown borer overwinter in your soybean stubble

Hugh Brier   July 22, 2016   Comments Off on Don’t let lucerne crown borer overwinter in your soybean stubble

Once again, lucerne crown borer (LCB) (Zygrita diva) has been active in soybeans this season. Worst affected regions were the Northern Rivers and the Liverpool Plains in NSW, but reports were also fielded from the Bundaberg, Fassifern and Darling Downs regions in Queensland. In some of the severely affected crops, over 80% of plants were infested, and up to 70%… Read more »

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

Hugh Brier   February 16, 2015   Comments Off on Etiella in mungbeans and soybeans – do we manage the threat or the pest?
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 »

Soybean moth active in North Queensland

Hugh Brier   February 2, 2015   Comments Off on Soybean moth active in North Queensland
Soybean moth larvae and typical leaf mining damage

Significant soybean moth activity has recently been reported in some Burdekin soybean crops. Soybean moth is a generally a minor soybean pest but significant outbreaks have been reported periodically in all soybean growing regions. Feeding damage Larvae feed mostly within the leaves, making distinctive pale leaf mines, and often distorting leaves. Soybean moth is present in low numbers in most… Read more »

Lucerne crown borer on the move in soybean in 2015

Hugh Brier   January 30, 2015   Comments Off on Lucerne crown borer on the move in soybean in 2015
Lucerne crown borer in early planted soybean at Bundaberg.
Image by Simon Andreolli

Lucerne crown borer (Zygrita diva) (LCB) is causing severe damage in a number of soybean crops in the Bundaberg region of SE Qld, and on the North Coast region of NSW. In some cases up to 75% of plants are infested and early plant death is evident. Damage seems to be worse in the early (November-planted) crops which were sown… Read more »

Pod and stem boring pests of soybean – an update

Kate Charleston   April 30, 2014   Comments Off on Pod and stem boring pests of soybean – an update

The 2013/14 soybean growing season has been challenging for many growers with very low rainfall and high temperatures until late March. Crop stress was sometimes wrongly attributed to insect pests although a number of crops were infested with more unusual pests such as etiella. The high temperatures also increased the impact of lucerne crown borer in infested crops.

Etiella on the move again

Hugh Brier   February 7, 2014   Comments Off on Etiella on the move again

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 »

Soybean stem fly outbreak in soybean crops

Kate Charleston   April 10, 2013   Comments Off on Soybean stem fly outbreak in soybean crops

An estimated 4,000 ha of soybeans near Casino in Northern NSW have been affected to varying degrees by soybean stem fly (Melanagromyza sojae) , a pest rarely seen in damaging numbers in Australia. Damage in many Casino crops is confounded by the presence of charcoal rot, a disease which blocks the plant’s vascular (xylem and phloem) tissue and causes similar… Read more »

Etiella outbreak in vegetative soybeans on the Darling Downs

Hugh Brier   January 19, 2013   Comments Off on Etiella outbreak in vegetative soybeans on the Darling Downs

Etiella (Etiella behrii) larvae have been observed in significant numbers (up to 10 larvae per square metre) in vegetative soybean crops in the Cecil Plains/ Pampas regions of the Darling Downs, and in low numbers (<1/sqm) in a DAFF soybean trial at Kingaroy. These infestations are likely due to the current hot and dry seasonal conditions which historically favour increased… Read more »