The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth an...The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth and development of Euproctis pseudoconspersa Strand as a basis and used the principal component analysis method to analyze and investigate the test data. The research results indicate that the principal component analysis method is a model with actual operation value and evaluation reliability. When the electromagnetic radiation is higher than 100 K, the growth and development indexes of E. pseudoconspersa Strand are correlated to electromagnetic radiation frequency to some extent.展开更多
[目的]明确10%硫氟肟醚悬浮剂对茶树茶毛虫的防治效果及使用剂量。[方法]采用田间茎叶喷雾法检测防治效果,以邓肯氏新复极差法检验差异显著性。[结果]10%硫氟肟醚悬浮剂45~135 g a.i./hm2剂量处理茶树茶毛虫,药后15 d防治效果达72.94%~9...[目的]明确10%硫氟肟醚悬浮剂对茶树茶毛虫的防治效果及使用剂量。[方法]采用田间茎叶喷雾法检测防治效果,以邓肯氏新复极差法检验差异显著性。[结果]10%硫氟肟醚悬浮剂45~135 g a.i./hm2剂量处理茶树茶毛虫,药后15 d防治效果达72.94%~93.26%,比对照药剂10%氯氰菊酯乳油防效好。[结论]10%硫氟肟醚悬浮剂以90~135 g a.i./hm2（制剂用量900~1350 g/hm2）剂量处理能有效控制茶毛虫的危害,可以在生产上推广应用。展开更多
基金Supported by Science and Technology Program of the Education Department of Shaanxi Province Government(16JK1158)
文摘The principal component method is to recombine multiple correlated indexes into a group of non-correlated comprehensive indexes to replace the original indexes for evaluation. The paper took the test data of growth and development of Euproctis pseudoconspersa Strand as a basis and used the principal component analysis method to analyze and investigate the test data. The research results indicate that the principal component analysis method is a model with actual operation value and evaluation reliability. When the electromagnetic radiation is higher than 100 K, the growth and development indexes of E. pseudoconspersa Strand are correlated to electromagnetic radiation frequency to some extent.
文摘[目的]明确10%硫氟肟醚悬浮剂对茶树茶毛虫的防治效果及使用剂量。[方法]采用田间茎叶喷雾法检测防治效果,以邓肯氏新复极差法检验差异显著性。[结果]10%硫氟肟醚悬浮剂45~135 g a.i./hm2剂量处理茶树茶毛虫,药后15 d防治效果达72.94%~93.26%,比对照药剂10%氯氰菊酯乳油防效好。[结论]10%硫氟肟醚悬浮剂以90~135 g a.i./hm2（制剂用量900~1350 g/hm2）剂量处理能有效控制茶毛虫的危害,可以在生产上推广应用。
