<正>为筛选出可直接喷雾使用的有效不育剂，笔者研制了两种不育剂CSI、CSⅡ（可湿性粉剂），对光肩星天牛成虫进行了不育性室内比较研究。模拟野外喷雾法对成虫进行喷雾处理后，将交配行为、产卵量、卵的孵化率、人工饲养条件下的种群生命表进行了对比研究。结果表明，喷雾使用CSⅡ不育剂20倍液对光肩星天牛的不育效果最好。

The natural wetland change in Hongze lake over long term has been studied using remote sensing image. The fusion classification method was employed in a combination of extensive field data to classify the ETM+image acquired on August 21, 2002. Then the thematic results were output to feature space of infrared versus red bands and the clusters were overlaid upon the thematic map. Further the clustering was implemented on the MSS data of August 6, 1979. Those clusters were imported into feature space. The clusters were then labeled using a combination of False Color Composites of MSS, the results of investigation, and the relationship between clusters in feature space. Finally, post-classification comparison was employed to quantify the magnitude of the changed areas between the two dates. The results indicated that a loss of 6 458.59 hm2 of natural wetland in the study area occurred, and the loss of natural wetland was the result of unreasonable development of wetland in the watershed.