Soybean stem fly on the move in soybeans in the Northern Rivers NSW

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Out­break report: Soy­bean stem fly (Melana­gromyza sojae) was detect­ed in late Jan­u­ary, 2018 in a 6-week old soy­bean crop near Casi­no, NSW. At the time of detec­tion, most stem fly in the crop were in the pupal stage. There were no plant ill health symp­toms (e.g. wilting/death), despite numer­ous exit holes made by lar­vae pri­or to pupa­tion. These holes are… Read more »

Keep a lookout for phytoplasma in mungbeans and other summer legumes

Last sum­mer saw unprece­dent­ed lev­els of phy­to­plas­ma in sum­mer pulses/legumes (includ­ing chick­peas, mung­beans and pigeon peas) in all crop­ping regions in east­ern and north­ern Aus­tralia from the Ord Irri­ga­tion area (WA), Burdekin/Atherton Table­lands (NQ), to cen­tral NSW. The most like­ly insect vec­tor is the brown leafhop­per Oro­sius ori­en­tal­is, which has been detect­ed in recent (2017) spring crops. While plant­i­ngs of… Read more »

Helicoverpa pheromone trapping program concluded for 2017

The Heli­cov­er­pa pheromone trap­ping pro­gram has recent­ly con­clud­ed for the 2017 Winter/Spring sea­son. The pro­gram, run by the Queens­land Depart­ment of Agri­cul­ture and Fish­eries for the North­ern Grain Grow­ing region, forms part of the nation­al Heli­cov­er­pa mon­i­tor­ing net­work joint­ly run by cesar, SARDI, and DAFWA. The pri­ma­ry pur­pose of the trap­ping net­work is to detect high moth activ­i­ty, for both… Read more »

Insect pest management in sorghum – a refresher

Sorghum is most sus­cep­ti­ble to crop loss from insect pests dur­ing flow­er­ing and grain fill, and this arti­cle deals most­ly with these species (sorghum midge, heli­cov­er­pa and Ruther­glen bug). How­ev­er, some years there may be pest infes­ta­tions in veg­e­ta­tive sorghum. Veg­e­ta­tive sorghum Dur­ing the veg­e­ta­tive stages you may see a few army­worm or heli­cov­er­pa lar­vae caus­ing shot-holes in the leaves,… Read more »

Rutherglen bug damage in mungbeans

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Although typ­i­cal­ly only in low num­bers in the North­ern Grains region, Ruther­glen bugs (RGB; Nysius vin­i­tor) were observed at very high den­si­ties (e.g. 50 RGB per pod) in many crops last year. A glasshouse study was con­duct­ed to deter­mine at what plant stage mung­beans were most sus­cep­ti­ble to RGB dam­age, in terms of both yield and seed qual­i­ty. To do… Read more »

Do I have a wireworm – true or false?

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Wire­worm adults and lar­vae are rel­a­tive­ly com­mon soil pests, attack­ing all field crops. Adults feed on ger­mi­nat­ing shoots, and lar­vae feed on ger­mi­nat­ing seed, seedling roots and shoots caus­ing poor plant vigour or death. Wire­worms are most com­mon in zero till, areas with high stub­ble, or weedy fal­lows. These are habi­tats and food sources that sus­tain the bee­tles and enable… Read more »

New aphid found in faba beans

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Megoura cras­si­cau­da has been found in parts of north-east and cen­tral New South Wales (Syd­ney, Tam­worth, and Breeza). The species orig­i­nat­ed in north-east Asia, and is close­ly relat­ed to the vetch aphid (Megoura vici­ae), found in Europe, Ethiopia and North Amer­i­ca. Its host range is most­ly lim­it­ed to Vicia species — vetch­es, faba or broad beans, and may extend to… Read more »

Helicoverpa activity and management in chickpeas

Heli­cov­er­pa are the pri­ma­ry insect pest of chick­peas. Ben­e­fi­cial insects that are present in many crops do not thrive in chick­peas, so suc­cess­ful heli­cov­er­pa man­age­ment relies heav­i­ly on mon­i­tor­ing and iden­ti­fi­ca­tion, appro­pri­ate­ly tim­ing con­trol to crop stage, and using the rec­om­mend­ed thresh­olds. Mon­i­tor­ing involves reg­u­lar in-field check­ing with a beat sheet. Addi­tion­al­ly, moth num­bers can be mon­i­tored using pheromone traps… Read more »

RWA as a pest in the northern grains region

RWA as a pest in the northern grains region" rel="bookmark" >

Russ­ian wheat aphid (RWA) is con­sid­ered a high pri­or­i­ty pest by the grains indus­try because of its poten­tial to cause sig­nif­i­cant yield loss­es in wheat and bar­ley if not well man­aged. Trit­i­cale and rye are also sus­cep­ti­ble to crop loss, but oats are con­sid­ered rel­a­tive­ly tol­er­ant. It is inevitable that RWA will estab­lish in the north­ern grains region, but we… Read more »

Assessing predator and parasitoid activity using sentinel prey

Of impor­tance to agron­o­mists is how pest pop­u­la­tions are chang­ing over time and the like­ly impact preda­tors will have on the pest pop­u­la­tion. Preda­tor and par­a­sitoid activ­i­ty can be dif­fi­cult to assess under field con­di­tions, par­tic­u­lar­ly the rate at which ben­e­fi­cials can find pest species. In this research, sen­tinel prey were used to gauge the lev­el of nat­ur­al preda­tor and… Read more »