Spies needed!

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Are Russian wheat aphids (RWA) still moving north? No detections of RWA in crops have been received this year, and no detections from outside the already known distribution area. The most northerly detections to date (2018) were from Coonamble and Coonabarabran. We expect RWA to move further north every year and knowing where they are will help you prepare. Now… Read more »

Redbanded shield bug not so red up north

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One of the revelations for entomologists Hugh Brier and Trevor Volp during their recent trip to the Burdekin was that northern redbanded shield bugs (RBSB) (Piezodorus oceanicus) appear to be pale in comparison to their southern counterparts. In south east Queensland, females have a red (or pink) transverse band across their ‘shoulders’. In samples collected from Kingaroy and Bundaberg in… Read more »

Unnecessary spraying not good for your crop, your industry, or your bank balance

Recent reports have surfaced that best practice pest management guidelines are not always being followed in winter and spring-planted mungbean and soybean crops. There are reports of some crops in the Burdekin being sprayed unnecessarily for well-below threshold pest populations, and/or being sprayed with no regard for the GRDC’s widely publicised Insecticide Resistance Management Strategy (IRMS) for Helicoverpa armigera. Similar… Read more »

Faba beans and the growths on pods this season

In 2019, many of the faba bean crops have growths on pods. There has been much debate over the years about the cause/s of the lumps seen on the pods of faba beans; with some attributing it to thrips, or more recently to green mirid feeding. The growths are called oedema or intumescences, and are caused when the uptake of… Read more »

Soybean moth alert for Burdekin and Mackay soybeans

UPDATE (1 October 2019): High numbers of moths are still being reported in this region. Continue to check soybean crops for this pest. Reports have come in of major soybean moth activity in winter-planted soybeans in the Burdekin and Mackay regions. Some of the outbreaks caught all concerned by surprise, and one report came from a crop barely 10 days… Read more »

Large flights of Helicoverpa armigera & Helicoverpa punctigera detected throughout the Northern Grains Region

The yearly Helicoverpa spp. pheromone trapping program for the Northern Grains Region, run by the Queensland Department of Agriculture and Fisheries (DAF), has recently commenced. During the first few weeks of trap catches, trap operators have detected flights of both H. punctigera and H. armigera in pheromone traps across the Northern Region (Table 1). Table 1. Latest Helicoverpa spp. pheromone… Read more »

Pests of late winter / early spring

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While drought has dashed the planned rotations of many growers, there is still a risk of pest outbreaks at this time of year. Below are some of the most common to keep an eye out for. A note on withholding periods following insecticide use in crops that are diverted to stock If insecticide treatments have been applied to crops which… Read more »

Check withholding periods before using insecticides in crops that could end up being grazed or cut for hay

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With current rainfall so uncertain, there is the potential for crop failures this season. If these crops are cut for hay, or grazed, it is critical that the withholding period (WHP) of any insecticide treatments are considered. The WHP is the minimum period that needs to elapse between the last use of the product and the harvesting or cutting of… Read more »

Armyworm outbreak

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Armyworm infestations of barley crops, in particular, are being reported from southern NSW to the Darling Downs. Large numbers of moths are also being seen around lights at night. It is not unexpected that armyworm would be abundant this spring as some of their source areas (Channel Country, North Western Queensland) would have received significant rainfall or flows earlier in… Read more »

Soybean bruchid outbreaks in Queensland soybeans

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Outbreaks of Bruchidius mackenziei (unofficially called the soybean bruchid) have been reported recently in soybean crops in the South Burnett and North Queensland. The bruchids were detected at harvest and postharvest, their timing matching previous reports of this pest from the Darling Downs and Burnett in 2009/10. Bruchidius mackenziei is a native bruchid that is most likely not a true… Read more »