饲料仓库玉米象发生特点及防治

Study on Occurance and Control of Sitophilus zeamais in Forage Houses

通过对玉米象(Sitophilus zeamais)生物学研究及防治试验,结果表明:在温度28℃和相对湿度75%条件下,完成其生活史约需30 d^40 d。仓储玉米在玉米象发生盛期,玉米粒受害率达40%,被蛀蚀与未蛀蚀的玉米粒比较,损失净重达34.6%。药剂熏蒸试验,56%磷化铝丸剂、26%磷化钙丸剂两种药剂对玉米密封熏蒸散气通风10 d后杀虫效果可达85%以上,以26%磷化钙丸剂杀虫效果最好。

The habit and characteristics of living, the pattern of occurance and control of Sitophilus zeamais （Mostchulsky） which infested maize in the storehouses were studied. S. zeamais accomplished its life cycle within 30 to 40 days under the temperature 28℃ and 75% relatively humidity. In the period of highest occurance, 40% of the kernels were damaged and the net weight loss was 34. 6%. Fumigation experiment with chemicals showed that the control percentage was 85% by treatment with 56% aluminium phosphide and 26 % calcium phosphide on the airproof condition and ventilate after 10 days, and it got the best control effect with 26% calcium phosphide pill.