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| Effects of Short-Term High Temperature on Survival of Megalurothrips usitatus （Bagnall）and Control Effect of Cowpea Field |
| YU Huailiang1，2，WU Mingyue2，LIU Zheng1，2，LI Jin5，LIN Junxu2，FU Qiumei2，MAI Xianjun2， LIU Yong2，SHI Caihua6，ZHANG Youjun3，XIE Wen3，4，KONG Xiangyi2* |
| 〔1School of Tropical Agriculture and Forestry，Hainan University，Haikou 570228，Hainan，China；2Sanya Academy of Tropical Agricultural Sciences，Sanya 572022，Hainan，China；3State Key Laboratory of Vegetable Biobreeding，Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China；4National Nanfan Research Institute（Sanya），Chinese Academy of Agricultural Sciences，Sanya 572024，Hainan，China；5Sanya Institute，China Agricultural University，Sanya 572025，Hainan，China；6Institute of Advanced Agricultural Science，Hubei University of Arts and Science，Xiangyang 441046，Hubei，China〕 |
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Abstract Abstract：At present，chemical control remains the most effective means of managing Megalurothripsusitatus（Bagnall）．Nonetheless，the urgency to develop environmentally friendly control techniques is paramount．In this study，the effect of short-term high temperature on the survival rate of M.usitatus and theeffectiveness of field control were studied through an indoor experiment（different temperature and exposuretime treatments）and a field experiment（different uncovering times at cowpea seedling and twigging stages）．The results of the indoor experiment demonstrated that short-term high temperatures had a significant impacton the survival rate of M. usitatus．This impact became increasingly pronounced with increasing temperaturesand prolonged exposure times．For instance，the high temperature treatment at 42 ℃ for 3 hours resultedin the death of both adults and wipers of M. usitatus．Conversely，the treatment at 44 ℃ for 1 hour resultedin the death of all wipers，while the treatment at 44 ℃ for 0.5 hour resulted in the death of all adults．Theresults of the field experiment demonstrated that the cowpea seedling and twigging period revealed the film at11：00-12：00，the control effect on adult M. usitatus reached a level exceeding 99%．Additionally，thecontrol effect could be maintained at 70% and above for 2 days after the treatment．However，the uncoveringof the film after 12：00 occasionally led to the phenomenon of seedling burning．
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Received: 28 February 2024
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