High Helicoverpa armigera (corn earworm) activity now being seen in winter cereals

Large flights of heli­cov­er­pa over the last 2 weeks (or longer in some dis­tricts) have seen sig­nif­i­cant eggs lays and lar­val pop­u­la­tions in win­ter crops, includ­ing the win­ter cere­als. It is not unusu­al to find both corn ear­worm and army­worm in cere­al crops. Cor­rect iden­ti­fi­ca­tion of the species present is very impor­tant as it influ­ences dam­age poten­tial and choice of… Read more »

Helicoverpa activity and pheromone trap catches to 16 September 2016

Heli­cov­er­pa punctig­era num­bers in pheromone traps look to be on the increase through Sep­tem­ber. The con­tin­ued migra­tion of H. punctig­era through spring is like­ly, if suit­able weath­er sys­tems occur, and it is like­ly that all sus­cep­ti­ble crops (chick­pea, canola, faba beans, spring mung­beans, spring sun­flow­ers) will expe­ri­ence heli­cov­er­pa pres­sure through Octo­ber and Novem­ber. Peter Gregg and Alice Del Socor­ro (Uni­ver­si­ty… Read more »

Would you like to know whether you have resistant weeds on your farm?

Over the next few months, you have the oppor­tu­ni­ty to have weed seed col­lec­tion and resis­tance test­ing under­tak­en on your farm by the Queens­land Depart­ment of Agri­cul­ture and Fish­eries (DAF). The Grain Research and Devel­op­ment Cor­po­ra­tion (GRDC) has con­tract­ed DAF to under­take the sur­vey of weeds and her­bi­cide resis­tance on grain-pro­­duc­ing farms through­out Queens­land.   The win­ter crop sur­vey will… Read more »

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 »

Seeking out storage pests

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Deter­min­ing stored pest sta­tus in a silo full of grain can be a bit like find­ing the prover­bial nee­dle in a haystack, but a pilot study by the Queens­land Depart­ment of Agri­cul­ture and Fish­eries on two farms in South­ern Queens­land indi­cat­ed that a com­bi­na­tion of sam­pling meth­ods may pro­vide a more accu­rate pic­ture of pest species present. Increas­ing on-farm stor­age… Read more »

Are there Russian wheat aphid in your wheat or barley? A short guide to checking and identifying.

Key points Con­di­tions suit­able for the usu­al cere­al aphid species will also be suit­able for RWA. Aphid pop­u­la­tions typ­i­cal­ly build rapid­ly in late July and August.  Do not assume aphids in cere­als are just the usu­al oat and corn aphid. In the event of a Russ­ian wheat aphid (RWA) infes­ta­tion, ear­ly detec­tion in spring is crit­i­cal to pre­vent yield loss.… Read more »

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 »

Update on Russian wheat aphid outbreak in South Australia.

The Nation­al Man­age­ment Group (NMG), com­pris­ing all Aus­tralian gov­ern­ments, Grain Pro­duc­ers Aus­tralia and Plant Health Aus­tralia, met on 8 June 2016 to dis­cuss the incur­sion of Russ­ian wheat aphid (Diu­raphis nox­ia) in South Aus­tralia. Act­ing on advice from the Con­sul­ta­tive Com­mit­tee on Emer­gency Plant Pests (CCEPP), the NMG agreed that it is not tech­ni­cal­ly fea­si­ble to erad­i­cate Russ­ian wheat aphid… Read more »

Ladybirds enjoy a cotton aphid buffet

The minute two-spot­t­ed lady­bird bee­tle (Diomus notescens) and the trans­verse lady­bird bee­tle (Coc­cinel­la trans­ver­salis) are two nat­ur­al ene­mies of cot­ton aphid (Aphid gossypii). They are com­mon­ly found in Aus­tralian crops, how­ev­er rel­a­tive­ly lit­tle is known about their biol­o­gy. A series of lab­o­ra­to­ry exper­i­ments were con­duct­ed by the Queens­land Depart­ment of Agri­cul­ture and Fish­eries (DAF) to learn more about aspects of… Read more »

Industry alert – Russian wheat aphids found in South Australia

The South Aus­tralian gov­ern­ment are cur­rent­ly respond­ing to detec­tions of Russ­ian wheat aphid (Diu­raphis nox­ia), which was ini­tial­ly found on a prop­er­ty in Tar­lee in South Aus­tralia on 13 May 2106. Since the first detec­tion, Russ­ian wheat aphid has been found on a fur­ther 22 prop­er­ties with­in 1,400 square kilo­me­tres, and the num­ber is expect­ed to rise. Inves­ti­ga­tions are under­way… Read more »