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Cold acclimation increases Asian citrus psyllid Diaphorina citri (Hemiptera: Liviidae) survival during exposure to freezing temperatures

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Insect Science 2022年第2期29卷 531-538页

作者： Xavier Martini Kathi Malfa Dara Stockton monique jrivera Department of Entomology and Nematology North Florida Research and Education CenterQuincyFloridaUSA USDA-ARS U.S.Pacific Basin Agricultural Research CenterHiloHawaiiUSA Department of Entomology University of CaliforniaRiversideCaliforniaUSA

The Asian citrus psyllid,Diaphorina citri,is the vector of the pathogenic bacteria that causes Huanglongbing,the most devasting disease affecting citrus *** cultivation of citrus tends to expand northward,the tolerance of psyllids to freezing temperatures needs to be *** mortality of *** to cold temperature has been previously studied,much less is known regarding the acclimation potential of psyllids to cold *** first evaluated cold resistance of *** depending on color morph and ***,we compared mortality of *** at−4°C for 10 hours between unacclimated psyllids,psyllids that were gradually acclimated to cold over 1 or 2 weeks,and psyllids intermittently acclimated also for 1 or 2 *** did not find major differences in cold resistance between color morphs and *** found that after 1 week of gradual acclimation,the survival of psyllids at−4°C increased to 86%,compared to 20%in the control *** did not increase after the second week of gradual *** intermittent acclimation improved survival compared to the control group,it was less effective than gradual acclimation with a survival at 30%and 70%after 1 and 2 weeks of acclimation,respectively,although this difference with gradual acclimation was not significant at week *** data show that gradual cold acclimation allows *** to survive brief periods below *** may serve as a mechanism responsible for increasing northern establishment of this pest.

关键词： cold acclimation cold hardy citrus cold resistance citrus greening Diaphorina citri overwintering

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