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前言磷化氢和溴甲烷是目前公认为防治贮粮害虫最好的薰蒸剂,因此,了解最有效地使用这两种化合物的手段成为人们关注的问题。使用磷化铝片剂或粉剂制备磷化氢特别经济,并可在各种贮藏水分中广泛使用。害虫对磷化氢抗性发展的可能性已被证实(Champ,1997)。最好广泛采用绝对杀死100%害虫的薰蒸条件,以阻止抗性的发展。已经知道杀死不同虫种所需要的磷化氢浓度和时间(Howe,1973,Bell,197旬Hole,1976)。然而,热带地区实际达到的气体浓度还没有得到很好
Phosphine and methyl bromide are the best fumigants currently recognized for their control of stored grain pests and understanding of the most efficient use of these two compounds has become a matter of concern. The use of aluminum phosphide tablets or powders for the production of phosphine is particularly economical and can be used in a wide range of stored moisture. The potential for pest resistance to phosphine has been demonstrated (Champ, 1997). It is best to widely adopt fumigation conditions that absolutely kill 100% of the pests to stop the development of resistance. Phosphine concentrations and times required to kill different species of insects have been known (Howe 1973, Bell 197, Hole 1976). However, the actual concentrations of gas in the tropics have not yet been well established