Pink Bollworm: Relationships Between Timing of Initial Insecticide Applications and Season-Long Control

C.A. Beasley, Carol J. Adams, and T.J. Henneberry


 
ABSTRACT

The pink bollworm, Pectinophora gossypiella (Saunders) is a late-season cotton pest and damaging infestation levels rarely occur before mid to late July. At that time, chemical control may be necessary to prevent economic losses, but initial pink bollworm infestations of 5 to 20 percent can be tolerated without yield loss (Watson and Fullerton 1969, Henneberry et al. 1977). Insecticides are heavily relied on for pink bollworm control but should be used as a last resort or as a supplement to cultural or other control measures (Reynolds 1980). In recent years, insecticide use patterns for pink bollworm control have evolved to include scheduled early-season sprays applied about the time cotton fruiting (squaring) is initiated. Grower acceptance of this practice prompted us to conduct studies in 1985 to determine the effect of initial insecticide applications applied at first hostable square, first flower or first susceptible cotton boll on season-long pink bollworm control. The present paper is a report of these studies.



Reprinted from 1987 Proceedings: Beltwide Cotton Production Research Conferences pp. 260 - 262
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998