农药学学报2016，Vol.18Issue(4)：459-464,6.DOI:10.16801/j.issn.1008-7303.2016.0064
球孢白僵菌 Bb84对 Q型烟粉虱的时间-剂量-死亡率模型分析
Time-dose-mortality of theBeauveria bassiana strain Bb84 on Q-biotypeBemisia tabaci
摘要
Abstract
In order to obtain entomogenous fungi strains with high toxicity against Q-biotypeBemisia tabaci and apply it to the production, the toxicity ofBeauveria bassiana strain against Q-biotypeB. tabaci were measured by using the method of spray. And the time-dose-mortality (TDM) model was applied to analyze the time and dose effects of strain Bb84 on Q-biotypeB. tabaci. The results showed that the mortality rate of strain Bb84 against the 3rd nymph was the highest and its lethality was the highest among the five tested strains and the daily cumulative mortality increased with the concentrate of conidial suspension. Strain Bb84 also had high toxicity to the 2nd and 4th nymph. The analysis of TDM model showed that the LC50 value decreased and dose effect increased with the extension of time;LT50 values were 5.44, 4.61 and 4.05 d for the 3rd nymph ofB. tabaci at spore concentrations of 1.0×107, 1.0×108 and 1.0×109 spores/mL, respectively. Thus the LT50 value decreased and time effect increased with the extension of dose. Therefore, in the actual production, when the concentration of theB. bassiana strain Bb84 is higher than 1.0×108 spores/mL, the control effect of the 3rd nymph ofB. tabaci is better.关键词
球孢白僵菌/Bb84菌株/Q型烟粉虱/毒力/时间-剂量-死亡率模型Key words
Beauveria bassiana/Bb84/Q-biotypeBemisia tabaci/toxicity/time-dose-mortality model分类
农业科技引用本文复制引用
王艳秋,周婷婷,林华峰,金鹏,李茂业,陈德鑫..球孢白僵菌 Bb84对 Q型烟粉虱的时间-剂量-死亡率模型分析[J].农药学学报,2016,18(4):459-464,6.基金项目
安徽省烟草公司2015年科技重点研究项目(20150551007)；中国烟草总公司科研重点项目(110201202003) （20150551007）
