Category Archives: aphids

New aphid found in faba beans

      No Comments on New aphid found in faba beans

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 »

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 »

Being prepared for Russian wheat aphid in the Northern grains region

The spread of Russ­ian wheat aphid (RWA) (Diu­raphis nox­ia) in the North­ern grains region is con­sid­ered inevitable. When it might be detect­ed in wheat and bar­ley is less clear as the key dri­vers of its spread are not well under­stood in Aus­tralia. Wind is like­ly to play a part in mov­ing winged aphids from south to north. The most norther­ly… 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 »

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 »

Pest Alert: Russian wheat aphid (Diuraphis noxia)

Call Biose­cu­ri­ty Queens­land on 13 25 23 if you see this pest Russ­ian wheat aphid (Diu­raphis nox­ia) has been found on over 1,400 square kilo­me­tres of land in the mid-north of South Aus­tralia. Russ­ian wheat aphid is a major pest of cere­al crops which injects tox­ins into the plant dur­ing feed­ing, retard­ing growth and killing the plant. Russ­ian wheat aphid… Read more »

Overview of the green peach aphid and beet western yellows virus outbreak in southern Australia (2014)

In the autumn and ear­ly win­ter of 2014, large areas of canola in South Aus­tralia, Vic­to­ria and south­ern NSW were heav­i­ly infest­ed with green peach aphid (GPA), and many of the infest­ed crops test­ed pos­i­tive for beet west­ern yel­lows virus (BWYV). GRDC TV  has com­piled a series of three videos that dis­cuss what fac­tors con­tributed to the GPA out­break, and… Read more »