Influence of plant maturity and application timing on efficacy of dicrotophos for control of cotton aphid Academic Article uri icon

abstract

  • Efficacy of dicrotophos for controlling the cotton aphid, Aphis gossypii Glover, was investigated at the Texas Agricultural Experiment Station at Chillicothe in 1992-1994. Cotton was planted in late April, late May, and late June each year, and dicrotophos, at 0,5 lb Al/acre, was applied as aphid numbers began increasing during August A single application was made at different aphid densities within each planting date. A treatment threshold of 35-50 aphids per leaf can be used for all three planting dates A single application prevented development of high numbers for extended periods in the late April and late May planting dates; in some years populations of 50 aphids per leaf did not develop in these two plantings. Multiple applications will probably be necessary to control aphids in late June cotton.

author list (cited authors)

  • Slosser, J. E., Idol, G. B., Rummel, D. R., & Pinchak, W. E.

publication date

  • June 1997