Lin Qing-sheng
2008
Citations
0
Influential Citations
2
Citations
Journal
Guangdong Agricultural Sciences
Abstract
The results of test in laboratory indicated that LC50 of beta-cyfluthrin,beta-cypermethrin and silafluofen was 1-47mg/L to 3rd instar larvae of Cnaphalocrocis medinalis,less than or equal to standard insecticides'.Index of relative toxicity ranged 96-38000.Field experiment results showed that when treated with appropriate dose,the efficacy of 2.5% beta-cyfluthrin EW and 5% Silafluofen EW was 70%~89%,the efficacy of three insecticides was 56%~92% to larvae,86%~98% to rice planthopper after 20 days.Phyto-toxicity of rice was not found and influence to natural enemy was little.