Thrip damage to early summer crops

Emerg­ing and veg­e­ta­tive sum­mer crops in close prox­im­ity to unhar­vested win­ter crop are at risk of thrip dam­age, but the dam­age is largely cos­metic and rarely war­rants treat­ing. Thrips breed up in win­ter cere­als, and par­tic­u­larly after rain, will move out of the win­ter crops in huge num­bers. Most of you will be famil­iar with the joys of thrips bit­ing… Read more »

Predicting helicoverpa development rate in finishing and late pulse/canola crops

As the early and mois­ture stressed crops fin­ish up, and those that were under a storm kick on, it is chal­leng­ing to try and esti­mate whether small heli­cov­erpa lar­vae in the crop should be con­trolled, or whether the crop will fin­ish up before they get to a dam­ag­ing size. There are a few things to keep in mind when mak­ing these… Read more »

Helicoverpa armigera emergence from diapause boosts trap catches.

Heli­cov­erpa moth activ­ity to 19 Octo­ber, 2015. Over the past 1–2 weeks we have seen increas­ing H. armigera catches in the pheromone traps across Queens­land (Qld) and north­ern New South Wales (NSW). The series of graphs of H. armigera and H. punctig­era trap catches from August to 19 Octo­ber are below. Included with these graphs are the cur­rent pre­dic­tions for the level… Read more »

Monitoring for establishment pests prior to sowing.

Where there is a his­tory of soil insect dam­age result­ing in poor crop estab­lish­ment a pre-sowing inspec­tion of the affected fields is war­ranted to deter­mine the likely risk to the upcom­ing sum­mer crop. Grain baits are an effec­tive way of mon­i­tor­ing for soil-dwelling insect pests of sum­mer crops, and is prefer­able to sam­pling with a shovel, which is both time con­sum­ing… Read more »

Helicoverpa activity — pheromone catch map

Melina Miles   September 17, 2015   Comments Off on Helicoverpa activity — pheromone catch map

Heli­cov­erpa pheromone trap catches to 18 Sep­tem­ber 2015 This infor­ma­tion is updated weekly on Fri­days and/or the fol­low­ing Mon­day. Where the data for the cur­rent week is not yet avail­able, click on the loca­tion marker to see data from pre­vi­ous weeks. The North­ern region pheromone trap net­work is part of a national net­work of traps being run in 2015, funded by GRDCRead more »

Helicoverpa activity and other pests to watch for in winter crops.

Melina Miles   September 10, 2015   Comments Off on Helicoverpa activity and other pests to watch for in winter crops.

Heli­cov­erpa armigera active now. This spring a num­ber of agron­o­mists have just started mon­i­tor­ing pheromone traps across the north­ern region, and the results from the past two weeks illus­trate how use­ful pheromone traps can be. Over the past 1–2 weeks, the traps are catch­ing rel­a­tively high num­bers of Heli­cov­erpa armigera, and low catches of H. punctig­era. In Sep­tem­ber it is gen­er­ally assumed that any… Read more »

Vegetable leafminer — new leaf-mining fly now in Australia

Hugh Brier   August 11, 2015   Comments Off on 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?

Hugh Brier   February 16, 2015   Comments Off on 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

Melina Miles   February 3, 2015   Comments Off on 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

Hugh Brier   February 2, 2015   Comments Off on 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 »