Response Influence of Sowing Dates Impact Bemisia tabaci (Gennadius) Infestation in Cucumber Crops (Cucumis sativus L.)

Ahmed M. Wahsh, Samir S. Awadalla, Hala A. K. El-Serfi, Magdy A. El-Hariry
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Abstract

The experiment conducted in a private cucumber field, Ibshway Center, Fayoum governorate, Egypt aimed to assess the influence of sowing dates on the infestation of Bemisia tabaci (Gennadius, 1889) in cucumber crops (Cucumis sativus L.). The study was carried out over two consecutive years, namely 2018 and 2019. During this period involved three planting dates were considered, namely March, August, and October. Weekly B. tabaci counts were recorded and compared across the different planting dates. According to the results, B. tabaci reached the highest peak of abundance in March sowing date in the second week of May 2018 and in the fourth week of April 2019 and presented by 825 and 1086 individuals/sample, respectively. While, in August sowing date, B. tabaci recorded the highest peak of abundance in the second week of October 2018 and in the third week of October 2019 and presented by 1432 and 1656 individuals/sample, respectively. August sowing date recorded the highest percentage of B. tabaci dominance during the two years 2018 and 2019 and presented by 50.6 and 48.9%, respectively. March sowing date recorded the lowest percentage of B. tabaci dominance during the two years 2018 and 2019 and presented by 23.7 and 25.3%, respectively.
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播期对黄瓜作物烟粉虱(Gennadius)侵害的响应影响
本试验在埃及法尤姆省Ibshway中心的一个私人黄瓜田进行,目的是评估播期对黄瓜作物烟粉虱(Gennadius, 1889)侵染的影响。该研究是在2018年和2019年连续两年进行的。在此期间涉及三个种植日期,即3月,8月和10月。每周记录烟粉虱数量,并比较不同种植日期的烟粉虱数量。结果表明,烟粉虱在3月播期(2018年5月第2周和2019年4月第4周)的丰度最高,分别为825和1086只/样。在8月播期,烟粉虱的丰度在2018年10月第2周和2019年10月第3周达到峰值,分别为1432和1656只/样。2018年和2019年8月播期烟粉虱优势率最高,分别为50.6%和48.9%。2018年和2019年3月播期烟粉虱优势率最低,分别为23.7%和25.3%。
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