摘要
本文研究了磷化氢、二氧化碳及低氧、二氧化碳混合熏蒸对腐食酪螨Ty-rophagusputrescentiae(Schrank)成螨的毒杀作用。结果表明:低氧(2%以下),较高浓度CO_2(32%以上)经较长时间(48小时)的密闭可以杀死95.5%以上的试螨。在PH_3和CO_2混合熏蒸中,CO_2能增加PH_3对该成螨的毒力、其增效系数因CO_2浓度和处理时间而异,最高增效系数为69.82。在混合熏蒸中,若较长时间的密闭,CO_2的最佳增效浓度为4~32%(容积比),若较短时间的密闭,CO_2最佳增效浓度为16~32%(容积比)。本文还对PH_3、CO_2的杀螨作用及CO_2对PH_3的增效作用进行了讨论。
The toxicity of phosphine,mixtures of phosphine + carbon dioxide and 2%oxy-gen + carbon dioxide to the adults of copra mite[Tyrophagus putrescentiae(Schrank )] werestudied.The results show that the mortality of the adults reach 95.5%at 2%oxygen,32%car-bon dioxide in a exposure period of 48 hours.In the mixed fumigation with carbon dioxide andphosphine,carbon dioxide is found to potentiate the toxicity of phosphine against the adults of themite. The synergic coefficient vary with the concentration of carbon dioxide and exposure period,and the highest synergic coefficient amount to 69.82.The optimum concentration of carbon diox-ide for synergy range from 4%to 32%(with a long exposure period)or form 16%to 32%(witha short exposure period).In addition,the role of carbon dioxide in the toxicity of phosphine andthe toxic effect of phosphine、carbon dioxide to the adults are discussed in this paper.
出处
《郑州粮食学院学报》
1994年第1期30-38,共9页
Journal of Zhengzhou Institute of Technology
关键词
磷化氢
混合熏蒸
腐食酪螨
毒力
phosphine
carbon dioxide
mixed fumigation:Tyrophagus putrescentiae(Schrank)
toxicity