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 »

Merry Chrysalis

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The Beatsheet would like to wish all our readers and subscribers a very merry chrysalis for 2019! For those taking a break we hope you have a safe and happy holiday. The Beatsheet is brought to you with the support of DAF, GRDC and CRDC. If you have any comments or suggestions regarding this pest management information service, please let… Read more »

2019 Helicoverpa spp. pheromone trapping in the Northern Grains region

Every year the Queensland Department of Agriculture and Fisheries runs a Helicoverpa spp. pheromone trapping program for the Northern Grains Region to detect flights of Helicoverpa armigera and Helicoverpa punctigera in important cropping areas. The trap network provides growers and agronomists with a warning system for potential egg-lay in susceptible crops. Although very few crops were planted this season due… Read more »

Leaf beetles in Burdekin pulses

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Rhyparida sp. (swarming leaf beetles) have been reported in some Burdekin soybean crops. While the risk of outbreaks has declined as leaves dry off, growers and consultants are reminded to keep a lookout for this sporadic but sometimes very damaging pest. Monolepta sp. (redshouldered leaf beetles) have also been observed in some crops. What to look for Dead leaves are… Read more »

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

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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

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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

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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 »