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用 4个谷蠹、5个米象和 4个锈赤扁谷盗磷化氢抗性品系进行了磷化氢抗性品系害虫对杀螟松和氯化苦的交互抗性试验。对杀螟松的抗性试验用FAO滤纸药膜法进行 ,对氯化苦的抗性试验参照FAO磷化氢抗性测定法 ,在干燥器内熏蒸处理。试验结果表明米象和锈赤扁谷盗的磷化氢抗性品系对氯化苦和杀螟松没有交互抗性。但两个谷蠹的磷化氢抗性品系对杀螟松表现出一定抗性 ,其抗性系数分别为 2 .94和 5.2 4。由于并非所有的磷化氢抗性品系都对杀螟松具有抗性 ,所以我们估计这种抗性是这些害虫以前接触过此种杀虫剂或类似的杀虫剂所引起的。所有的谷蠹品系对氯化苦都没有抗性。上述结果表明 ,为控制害虫对磷化氢抗性发展而采用轮换使用药剂策略时 ,氯化苦和杀螟松都是合适的轮换对象。
The cross resistance of fenphosate and chloropicrin to phosphinothricin-resistant pests was tested using four barley beetles, five rice plants and four rust-resistant cultivars of phosphine resistance. The resistance test against fenitrothion was carried out using the FAO filter paper membrane method. The resistance test against chloropicrin was fumigated in a desiccator according to FAO phosphine resistance test. The experimental results show that the phosphine resistant strains of S. millet and S. australis have no cross resistance to chloropicrin and fenitrothion. However, the phosphinothric resistant strains of Rhizoctonia solani showed resistance to fenitrothion, with resistance coefficients of 2.94 and 5.24, respectively. Since not all phosphine resistant strains are resistant to fenitrothion, we estimate that this resistance is caused by previous exposure of these pests to such pesticides or similar pesticides. All barley lines have no resistance to chloropicrin. The above results indicate that both chloropicrin and fenitrothion are suitable candidates for the rotation strategy when controlling the development of resistance to phosphine in pests.