几种主要储粮害虫对磷化氢、马拉硫磷抗药性及对策技术研究

RESISTANCE OF SOME MAIN STORED GRAIN INSECTS TO PHOSOPHONE AND ITS COUNTERMEASURES

通过对六种主要储粮害虫对磷化氢、马拉硫磷的敏感度及抗药性测定，结果表明：（１）玉米象对磷化氢敏感或轻敏感，对马拉硫磷表现为显著抗药性。（２）赤拟谷盗对磷化氢敏感或轻敏感，对马拉硫磷表现为抗性，其中轻抗品系占６．９％，显抗品系占９３．１％，抗性系数最高的达３４５倍。（３）谷蠹对磷化氢敏感和轻敏感品系占６８％，轻抗和显抗品系占３２％，有的抗性系数高达３４倍；对马拉硫磷轻敏感品系占２６．１％，轻抗品系占７３．９０％。（４）土耳其扁谷盗对磷化氢敏感或轻敏感，但对马拉硫磷具有抗性征兆。（５）长角扁谷盗对磷化氢敏感和轻敏感品系占８３．４％，轻抗和显抗品系占１６．６％；对马拉硫磷敏感和轻敏感品系占９１．７％，轻抗品系占８；３％。（６）锈赤扁谷盗对磷化氢和马拉硫磷均表现为抗性。

The experiment on the sensitivity and the resistance of the six main stored-grain insects to malathion and phosophene shows that( 1)Sitophilus zeamais motschul is sen-sitive or slightly sensitive to phosophene but shows remarkable resistance to malathion(2)T. castaneum is sensitive or slightly sensitive to phosophene but resistant to malathion,6.9%of the strains being slightly resistant and 93.1%strongly resistant(3) 68%of phyzoperthadominica are sensitive or slightly sensitive to phosophene,32%resistant or slightly resistantwith the highest resistant coefficient being 34folds;26.1%and 73.9%are slightly sensitiveand resistant to malathion respectively,4(4)Turkey cryptolestes are slightly sensitive or sen--sitive to phosophene,but show resistant signs to malathion.(5 ) 83.4%of are sensitive orslightly sensisive to phosophene and 16.6%are slightly resistant or resistant,while 91.7%sre sensitive and 8.3%are slightly resistant to malathion.(6)Cryptoletos ferrugineus are re-sistant to both phosophene and malathion.