WIDESTIKETM INSECT PROTECTION AGAINST HELIOTHINE INSECTS

摘要

Field studies were conducted at seventeen test sites across the cotton belt in 2004. Results showed that cotton expressing the WideStrikeTM trait (PHY 440 W and PHY 470 WR) provided very good control of both cotton bollworm (Helicoverpa zea) and tobacco budworm (Heliothis virescens). Management of high populations of cotton bollworm, particularly those sustained over an extended period of time, may require application of a foliar insecticide to prevent exceeding the treatment threshold and to achieve optimum yields in WideStrike cotton. No high populations of tobacco budworm occurred at any of the test sites in 2004, but previous studies indicate no additional insect control measures would be needed to manage this pest in WideStrike cotton.