섬유

Biological Control> of Whiteflies on Cotton: A reality Check.

  • 출판일1996.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 532
An experiment assessed the feasibility of using the aphelinid wasp Eretmocerus californicus Howard to control infestations of the sweetpotato whitefly Bemisia tabaci Gennadius. Efforts focused on two questions: whether the wasp could control whitefly populations under typical growing conditions in open cotton fields; and, if so, how many wasps needed to be released per plant to achieve an effective control rate. Tests occurred at cotton fields in the Imperial Valley region of Arizona. Results were promising but mixed: the wasps managed to reduce whitefly population levels in the target fields by approximately 36 percent. However, the average number of wasps needed per plant was ten--a number not considered practical for commercial application. Extrapolations showed that between 500,000 and 1.5 million wasps would be needed per acre for the effective biological control of whitefly infestations. 34 refs.
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