Tag Archives: midge

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 »

Helicoverpa and midge management in sorghum

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As crops come into head and start to fill grain, sorghum midge and heli­cov­er­pa will start to infest crops. Mak­ing a deci­sion about when con­trol is war­rant­ed is made some­what eas­i­er with the avail­abil­i­ty of eco­nom­ic thresh­old cal­cu­la­tors now avail­able on the Beat­sheet Blog (https://thebeatsheet.com.au/sampling-2/); or use the ready reck­on­ers in this arti­cle. MANAGEMENT OF SORGHUM MIDGE How to count… Read more »

Thresholds and changing sorghum crop value

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Grow­ers and con­sul­tants need to revise the thresh­olds used for impor­tant insect pests of grain sorghum such as corn ear­worm and sorghum midge in light of low­er prices cur­rent­ly being offered. With new crop grain sorghum prices below $200 per tonne, the break even cost of con­trol means that high­er pest num­bers (den­si­ty) are need­ed before con­trol becomes eco­nom­ic, com­pared… Read more »

Watch out for midge this season

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Adam Hardy Senior Ento­mol­o­gist, Queens­land Depart­ment of Pri­ma­ry Indus­tries and Fish­eries, Toowoom­ba. Pho­to: Adam Hardy (right) and Bernie Franz­mann inspect­ing midge rat­ing tri­als. Over the last decade sorghum midge have not caused many headaches for sorghum grow­ers. How­ev­er, stag­gered sorghum plant­i­ngs mean that sorghum midge are like­ly to be found build­ing up in num­bers in lat­er plant­ed sorghum crops with… Read more »