储粮害虫钻孔行为初步研究

设计的测定储粮害虫钻孔行为的装置由8种不同孔径的孔筛小瓶组成，筛孔直径分别为1．5mm,1.3mm,1.2mm,1.1mm,1mm,0.9mm,0.8mm及0.6mm，采用该装置对玉米象、米象、赤拟谷盗、杂拟谷盗、长头谷盗、谷蠹及锯谷盗单一种群和复合种群钻孔行为习性进行测试。测试结果表明，单一群条件下，玉米象、米象、谷蠹及长头谷盗钻孔行为习性进行测试。测试结果表明，单一种群条件下，玉米象、米象、谷蠹及长头谷盗钻孔指数分别为0．28、0．30、0．35及0．24，钻孔习性基本相似；杂拟谷盗和赤拟谷盗钻孔指数分别为0．77和0．9；锯谷盗活动性较强，钻孔指数为0．57。讨论了玉米象、赤拟谷盗、长头谷盗、锯谷盗及谷蠹复合种群各害虫种类的钻孔习性，与单一种群比较，玉米象和谷蠹钻孔指数增高，赤拟谷盗和锯谷盗钻孔指数降低，长头谷盗钻孔指数变动不大。

PRELIMINARY RESEARCH OF BORING BEHAVIOR OF STORED GRAIN INSECTS

An equipment used for testing boring behavior of grain insects was composed of 8 types of sieves,and their diameters are 1.5mm,1.3mm,1.2mm,1.1mm,1.0mm,0.9mm,0.8mm and 0.6mm respectively.The results showed that on condition of single population,boring indexes were 0.28 to Sitophilus zeamais Motschulsky, 0.30 to Sitophilus oryzae(L.),0.35 to Rhizopertha dominica (Fab.),0.24 to Latheticus oryzae Waterhouse.Their boring habit is similar,and 0.77 to Tribolium confusum Jacquelin du Val,0.9 to Tribolium castaneum (Herbst) ,0.57 to Oryzaephilus surinamensis (L.).Boring habits of Sitophilus zeamais Motschulsky,Tribolium castaneum (Herbst),Latheticus oryzae Waterhouse,Oryzaephilus surinamensis (L) and Rhizopertha dominica (Fab) in the composite population condition were discussed,and compared with single population,boring indexes of Sitophilus zeamais Motschulsk and Rhizopertha dominica(Fab.) are increased,Tribolium castaneum (Herbst) and Oryzaephilus surinamensis (L.) are decreased,and Latheticus oryzae Waterhouse has no obvious change.