Laboratory survival of Drosophila suzukii under simulated winter conditions of the Pacific Northwest and seasonal field trapping in five primary regions of small and stone fruit production in the United States
Laboratory survival of Drosophila suzukii under simulated winter conditions of the Pacific Northwest and seasonal field trapping in five primary regions of small and stone fruit production in the United States
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DOI：
10.1002/ps.2280
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发表时间：
2011-11-01
影响因子：
4.1
通讯作者：
Isaacs, Rufus
中科院分区：
文献类型：
--
作者：
Dalton, Daniel T.;Walton, Vaughn M.;Isaacs, Rufus
背景：铃木果蝇于2009年8月首次在俄勒冈州被发现。这种害虫对区域小型和核果果业的威胁导致对其在太平洋西北部水果种植区的越冬能力进行了调查。对其耐寒性的了解将有助于开发计算机模型来预测季节性种群的消长。结果：在1500只成虫或蛹中，22只(1.4%)个体存活了84天的实验冷冻期。大多数幸存者(86%)接受了10摄氏度的温度治疗。低温处理的成活率显著降低。冷冻暂时增加了死亡率，但在试验期内对总体死亡率没有明显影响。据估计，从蛹中羽化出来的苍蝇在10摄氏度的环境中可以存活103-105天，在较低的温度下可以存活更短的时间。在加利福尼亚州和俄勒冈州的5个水果产区的田间诱捕已经显示出在加利福尼亚州和俄勒冈州越冬的存活率，但华盛顿东部和密歇根州的越冬存活率预计会降低。结论：这里报道的实验表明，在温度低于10摄氏度的情况下，铃鹿不太可能长期存活。来自5个气候区的田间数据表明，2010年除加利福尼亚州外，所有地区都延续了最初的低铃木田间存活率，加州的田间存活率记录较早。(C)2011年化学工业学会
BACKGROUND: Drosophila suzukii was first found in Oregon in August 2009. The threat of this pest to regional small and stone fruit production industries led to investigations on its overwintering capabilities in fruit-growing regions in the Pacific Northwest. Knowledge of its cold tolerance will help in the development of computer models to forecast seasonal population growth and decline.RESULTS: Of 1500 adults or pupae, 22 (1.4%) individuals survived the 84 day experimental chilling period. Most (86%) of the survivors were subjected to 10 degrees C temperature treatments. Survival decreased significantly at lower temperature treatments. Freezing temporarily increased the mortality rate but did not significantly affect overall mortality over the trial period. Flies that emerged from pupae are estimated to survive for up to 103-105 days at 10 degrees C and for shorter periods at lower temperatures. Field trapping in five fruit production areas has demonstrated overwintering survival in California and Oregon, but lower survival is predicted in Eastern Washington and Michigan.CONCLUSION: The experiments reported here indicate that long-term survival of D. suzukii is unlikely at temperatures below 10 degrees C. Field data from five climatic regions indicated extended low initial D. suzukii field presence in 2010 in all regions except California, where field presence was recorded earlier. (C) 2011 Society of Chemical Industry