oa Journal of the Entomological Society of Southern Africa - Further tests of threshold levels for the control of cotton bollworms (mainly Heliothis armiger)

Volume 46, Issue 1
  • ISSN : 0013-8789



Cotton plots at Rust der Winter and Groblersdal were treated during the 1981-82 growing season with cypermethrin. The conclusion of the study is that fewer insecticide applications against bollworms in cotton can be made in these two growing sites without any decline in yield.

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