섬유

Monitoring Cotton Plant Growth and Response Using COTMAN to Evaluate Effects of Chemical Control of Cotton Aphid.

  • 출판일2000.10
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 266
An investigation into the effects of a preflower aphid infestation on crop delay used the COTMAN crop management system to evaluate crop response to stress, monitor square retention, and examine treatment effects of crop earliness. Preflower cotton aphid infestation reduced total lint yield. Infestation time extended from squaring node five to first flower, at which time populations collapsed due to an endemic entomopathogenic fungus. Plots receiving two applications of Provado 1.6F applied at 2 ounces per acre produced a mean yield of 940 pounds of lint per acre, 77 pounds more lint per acre than the untreated check. Although insecticide applications increased yields, differences in net profit between treated and untreated plots were only marginally significant. Stress associated with the timing of aphid infestation was evident in COTMAN crop development curves. 7 refs.
이전글 다음글 목록