1. Effects of Three Insect Control Schemes on Populations of Cotton Insects and Spiders, Fruit Damage, and Yield of Westburn 70 Cotton 1
- Author
-
Robert D. Morrison, D. R. Molnar, J. H. Young, and E. K. Johnson
- Subjects
Ecology ,biology ,Chrysopa ,media_common.quotation_subject ,Insect ,biology.organism_classification ,Sorghum ,Predation ,Bollworm ,Agronomy ,Heliothis ,Anthonomus ,Insect Science ,Yield (wine) ,Ecology, Evolution, Behavior and Systematics ,media_common - Abstract
Numbers of predatory insects (lady beetles, primarily Hippodamia spp.; green lacewings, Chrysopa spp.; nabids, Nobis spp.; soft-winged flower beetles, Collops spp.; hooded beetles, Notoxus monodon F.; big-eyed bugs, Georcoris spp.), spiders (unidentified), and fleahoppers, Pseudatomoscelis seriatus (Reuter) were determined weekly in cotton grown under 3 insect control schemes. Numbers of fruits damaged by the Heliothis complex (the bollworm, Heliothis zea (Boddie), and the tobacco budworm, H. virescens F.) and by the boll weevil, Anthonomus grandis Boheman were also determined. The 3 control schemes used were (1) strip-planted with grain sorghum, (2) solid-planted, insecticide treatments according to OSU Agriculture Extension Service recommendations, and (3) solid-planted, no insecticide treatments. Significantly greater numbers of predators occurred in the strip-planted plots. Overall differences in fleahopper numbers and fruit damage by the Heliothis complex were insignificant. Damage by the boll weevil was negligible. Yield per acre in the stripplanted test was higher at P=0.10 than in either of the other tests. In addition, an avg. 5308 lbs/acre of grain sorghum was produced in the strip planted plots.
- Published
- 1976
- Full Text
- View/download PDF