Population Ecology of the Cotton Mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae) on Okra Plants in Luxor Region, Egypt
محل انتشار: مجله علوم و فناوری کشاورزی، دوره: 25، شماره: 6
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 47
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شناسه ملی سند علمی:
JR_JASTMO-25-6_011
تاریخ نمایه سازی: 9 دی 1402
چکیده مقاله:
Among several pests infesting okra plants, the cotton mealybug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae) is considered one of the most destructive pests. Field trials were conducted in a private field in Esna District, Luxor Governorate, Egypt, during two successive growing seasons (۲۰۲۱ and ۲۰۲۲) with the aim to study the seasonal fluctuation of P. solenopsis population infesting okra plants (Balady cultivar). Furthermore, the impacts of both climatic conditions and plant age on the seasonal variation of the tested insect pest were determined. The results indicated that P. solenopsis infested okra plants from the first week of March until the end of July, and had three peaks of activity per season, which were recorded in the first week of April, third week of May, and fourth week of June. The mean total population density of P. solenopsis per ۱۰ leaves over the whole first season was ۲۳۵.۹۶±۱۶.۰۵ individuals and for the second season, it was ۲۴۲.۱۳±۱۷.۰۱ individuals. June was the most favourable month for P. solenopsis population increase (as measured during weekly inspections), while March was the least favorable in both growing seasons. Pooled effects of environmental conditions and plant ages had a strong relationship with P. solenopsis population density, with an Explained Variance (EV) of ۹۳.۲۶% in the first season and ۹۵.۰۹% in the second season, during the two seasons. Daily mean relative humidity was the most effective variable in explaining changes in the population density of P. solenopsis for the ۱st season (۲۰۲۱), while the it was the major element influencing the changes in population in the ۲nd season. On the other hand, the daily maximum temperature was clearly the least effective factor in population changes during both seasons. The data presented here can aid to monitor the oscillations in the population density of this pest.
کلیدواژه ها:
نویسندگان
M. Bakry
Department of Scale Insects and Mealybugs Research, Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt.
Y. Fathipour
Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box: ۱۴۱۱۵-۳۳۶, Tehran, Islamic Republic of Iran.
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