不同防控技术对秋延后避雨与保温栽培辣椒 烟粉虱的防效评价

摘要：为了有效防控洞庭湖区秋延后大棚避雨与保温栽培辣椒的烟粉虱，探究新的减药增效防控技术， 采用6种不同组合防治措施：黄板＋性诱剂、黄板＋性诱剂＋噻虫嗪、黄板＋吡虫啉、黄板＋性诱剂＋异丙 威、黄板＋性诱剂＋噻虫嗪＋异丙威、黄板＋吡虫啉＋异丙威等，比较分析其对辣椒烟粉虱的田间防治 效果。结果表明：6种防治措施对烟粉虱防治均有一定效果；从虫口减退率分析，药后7 d，黄板＋性 诱剂＋噻虫嗪处理达到最大值（90.8%），药后14 d降至77.9%；药后1 d，黄板＋性诱剂＋异丙威处理达 到最大值（97.6%），虫口数量大幅下降，药后14 d 仍维持在74.1%；从校正防效持久性分析，黄板＋性 诱剂＋噻虫嗪和黄板＋性诱剂＋噻虫嗪＋异丙威的防效较好，在药后14 d仍保持在89.2%以上；从产量分 析，黄板＋性诱剂＋噻虫嗪的产量最高。本着减量增效的原则，黄板＋性诱剂＋噻虫嗪防控技术为洞庭 湖区辣椒秋延后避雨与保温栽培烟粉虱防控最优组合。

Evaluation on the Control Effects of Different Prevention and Control Technologies of Bemisia tabaci in the Rain Shelter and Heat Preservation Cultivation of Peper after Autumn Delay

Abstract: In order to effectively control Bemisia tabaci of pepper in the rain shelter and heat preservation cultivation of greenhouses in Dongting Lake area after autumn delay, and explore a new prevention and control technology of drug reduction and effi ciency increase, six different combination control measures were adopted, including the field control effects of yellow plate + sex attractant, yellow plate + sex attractant + imidacloprid, yellow plate + imidacloprid, yellow plate + sex attractant + isoprocarb, yellow plate + sex attractant + thiamethoxam + isoprocarb, yellow plate + imidacloprid + isoprocarb against Bemisia tabaci on pepper were compared and analyzed. The results showed that the six prevention and control measures had certain effects on the control of Bemisia tabaci.From the analysis of the decrease rate of insect infestation, yellow plate +sex attractant + thiamethoxam reached the maximum value (90.8%) at seven days after treatment, and decreased to 77.9% at 14 days. The maximum value reached 97.6% at the fi rst day after treatment with yellow plate + sex attractant + isoprocarb, and the number of insect populations decreased signifi cantly, which remained at 74.1% at 14 days. From the analysis of the persistence of the correction control effect, the control effect of yellow plate + sex attractant + thiamethoxam and yellow plate + sex attractant + thiamethoxam + isoprocarb were better, and remained above 89.2% at 14 days after treatment. From the analysis of yield, the yellow plate + sex attractant + thiamethoxam was the highest. Based on the principle of decrement and synergism, the control technology of yellow plate + sex attractant + thiamethoxam for Bemisia tabaci was the optimal combination in rain shelter and heat preservation cultivation for pepper after autumn delay of Dongting Lake area.