Category Archives: NPV

Chemigation for corn earworm control

By admin | Published: January 8, 2010
Control of corn earworm, Helicoverpa armigera, in maize has generally not been practised because of the high cost associated with repeated insecticide application required during silking. In most years it is a case of forsaking the top of every cob to larval damage However, in some years, very high pest activity results in more severe cob [...]
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Bring on NPV against grubs on grain sorghum

By admin | Published: November 26, 2008
Every year caterpillars of the corn earworm (helicoverpa), Helicoverpa armigera, cause losses to sorghum crops. Regular inspection during flowering is important to detect caterpillar infestations and properly time control measures. Pre-flowering heads of grain sorghum are very attractive to egg-laying moths of the corn earworm. On any individual head, most eggs are laid prior to [...]
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Getting the most from NPV sprays on grain sorghum

By admin | Published: December 14, 2007
Some issues have recently been raised on the Darling Downs regarding the use of Helicoverpa nucleopolyhedrovirus (NPV) against corn earworm on grain sorghum. These issues involve the delay in time to kill and the level of control not necessarily meeting growers’ expectations. Seasonal conditions The last couple of weeks on the Downs have been cooler than normal. [...]
Also posted in Sorghum | 1 Comment