Vegetable leafminer — new leaf-mining fly now in Australia

Back­ground A new leaf-mining fly, the veg­etable leafminer (Liri­omyza sati­vae), has recently been found at Seisia on the west­ern side of the top of Cape York, Queens­land. Orig­i­nally from the Amer­i­cas, since the 1980s this pest has spread west­wards across the Pacific into Asia and has been island hop­ping across Tor­res Strait since 2008. Any sus­pected sight­ings of the pest should be… Read more »

Etiella in mungbeans and soybeans – do we manage the threat or the pest?

Medium etiella larva (5 mm), with typical pale green colour and pink stripes.

There is an under­stand­able level of con­cern about how best to man­age etiella (Etiella behrii) in sum­mer mung­bean crops fol­low­ing the unex­pect­edly high etiella infes­ta­tions (and cor­re­spond­ing seed dam­age and con­t­a­m­i­na­tion) in spring mung­bean crops on the Downs and in Cen­tral Queens­land and North West­ern New South Wales. Respond­ing to the etiella threat with­out react­ing pre­ma­turely and cre­at­ing more pest prob­lems.… Read more »

Locusts and grasshoppers active across western regions and central Queensland

Spur-throated locust nymph (QDAFF)

Locusts and grasshop­pers are active across large areas of west­ern Queens­land and NSW and cen­tral Queens­land. Reports of the Aus­tralian Plague Locust, Migra­tory Locusts,  Yel­low winged locust and spur-throated locust have been received from areas around St George to the Cen­tral High­lands dur­ing Jan­u­ary and early Feb­ru­ary. It has been sev­eral years since we have seen such high locust and grasshop­per… Read more »

Soybean moth active in North Queensland

Soybean moth larvae and typical leaf mining damage

Sig­nif­i­cant soy­bean moth activ­ity has recently been reported in some Bur­dekin soy­bean crops. Soy­bean moth is a gen­er­ally a minor soy­bean pest but sig­nif­i­cant out­breaks have been reported peri­od­i­cally in all soy­bean grow­ing regions. Feed­ing dam­age Lar­vae feed mostly within the leaves, mak­ing dis­tinc­tive pale leaf mines, and often dis­tort­ing leaves. Soy­bean moth is present in low num­bers in most… Read more »

Lucerne crown borer on the move in soybean in 2015

Lucerne crown borer in early planted soybean at Bundaberg.
Image by Simon Andreolli

Lucerne crown borer (Zygrita diva) (LCB) is caus­ing severe dam­age in a num­ber of soy­bean crops in the Bund­aberg region of SE Qld, and on the North Coast region of NSW. In some cases up to 75% of plants are infested and early plant death is evi­dent. Dam­age seems to be worse in the early (November-planted) crops which were sown… Read more »

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

green peach aphid

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 »

Etiella alert for mungbean on the Darling Downs, Goondiwindi and Northern NSW growing regions

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Etiella moth - 12 mm long

A sig­nif­i­cant etiella out­break was recently reported in pod-filling mung­bean in the Moree region of North West­ern NSW. In this par­tic­u­lar crop, it is esti­mated that etiella lar­vae have infested pods on 50% of plants. Etiella eggs, at low den­si­ties, were also recently observed in an early flow­er­ing crop near Bun­gunya (west of Goondi­windi, Qld).

Bruchids infesting pulse crops in the field

Cowpea bruchid (weevil) adults (3mm) in field peas, harvested 16/10 Goondiwindi and noticed at intake on 17/10. They continued to breed in the seed sample.

There have been two reports recently of cow­pea bruchid activ­ity, with these pests infest­ing pulse crops in the field prior to har­vest. The first report con­cerned the cow­pea bruchid (wee­vil) Cal­loso­bruchus mac­u­la­tus in field peas from Goondi­windi. The bruchids were noticed at intake and con­tin­ued to breed in an untreated grain sam­ple post-harvest. This clearly indi­cated they were not pea… Read more »

Watch for Rutherglen bugs moving from canola into neighbouring crops.

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Ruther­glen bug (RGB) num­bers in canola stub­ble are again high in some fields. These infes­ta­tions pose a risk to neigh­bour­ing crops, either through dam­age to estab­lish­ing sum­mer crops or con­t­a­m­i­na­tion of unhar­vested win­ter crops. Both the canola and adja­cent crops war­rant mon­i­tor­ing for RGB infes­ta­tion and move­ment out of the canola field. If large num­ber of nymphs move into adja­cent fields with seedling… Read more »