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PAU observes spotted bollworm attack on indigenous cotton
16
Aug '16
An attack of spotted bollworm on indigenous cotton and also an attack of American bollworm on non-Bt cotton at a few locations has been observed by experts of the department of entomology, Punjab Agricultural University (PAU).

According to the head of the entomology department, RS Gill, spotted bollworm attack indigenous cotton during flowering and so the first spray on indigenous cotton should be done when 25 per cent of plants start producing squares.

“Subsequent spray should be done at 10 days interval, while in case of non-Bt cotton, the crop should be sprayed, if damage caused by bollworms exceeds 5 per cent among the freshly-shed fruiting bodies,” Gill advised.

Explaining the process, he added, "For this purpose, divide the field into four quarters and collect 25 freshly-shed fruiting bodies at random in each quarter. The fruiting bodies damaged by bollworms will have feeding holds or their larvae."

He also advised to not use mixtures of insecticides such as Acephate, Monocrotophos and Pride as they result in resurgence and faster development of resistance and in case of serious incidence of American bollworm, advised use of Indoxacarb or Spinosad. (AR)

Fibre2fashion News Desk - India

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