Tag Archives: helicoverpa

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 »

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 »