섬유

insecticide washoff from cotton plants as a function of time between application and rainfall

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 241
methyl parathion (mp), toxaphene (tox), and fenvalerate (fen), as emulsifiable concentrates, were tank mixed with water and applied at 1. 5 $plus$ 2. 30 $plus$ 0. 11 kg active ingredient/ha to cotton plants (triplicate plots) by ground equipment. simulated rainfall (51 mm) was applied. the fraction of mp washed from the plants decreased exponentially with time, after application and linearly with load on the plants. in contrast to mp, the fractions of tox and fen washed from the plants were relatively constant at 10 and 7, respectively, regardless of time after application and loads on the plants. about 50 of the mp, tox, and fen washed from the plants by any one storm washed off by only 7 to 8 mm of rainfall, regardless of when rain occurred. (edited author abstract) 22 refs
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