Amin, A.H., & Youssef, A.S.E18066 2005 Some ecological aspects of Hibiscus Mealybug, Maconellicoccus hirsutus (Green) in vineyards in Egypt (Hemiptera: Pseudococcidae).. Proceedings of the X International Symposium on Scale Insect Studies, held at Plant Protection Research Institute, Adana/ Turkey, 19-23 April 2004. Adana Zirai Muscadele Arastirma Enstitusu. Adana, Turkey 408 pp.
Notes: ABSTRACT: Certain ecological aspects of hibiscus mealybug, Maconellicoccus hirsutus (Green) were studied in vineyards in EL-Saf, Giza, Egypt from 1996 to 1998. Seasonal fluctuations of alive individuals of M. hirsutus found to have three periods of seasonal abundance. The first period occurred during summer, the second during autumn and the third one during spring. After autumn period most population overwintered from late November to next February. Also, this species passed through three annual overlapping generations. The summer generation, lasted 10-12 weeks; autumn generation (14 weeks) and spring generation, lasted 22-26 weeks. The effects of main climatic factors on the population dynamics of alive population showed that both minimum and maximum means temperature four weeks earlier had negative effects during summer and autumn generations, while during spring generation the same factor had positive significant effects throughout both years. Mean percentage of relative humidity had negative significant effects during summer generation, while during autumn and spring generations the same factor showed variable effects. The combined effects of the three climatic factors were responsible as a group from 62.80% to 93.04% of the changes in population dynamics throughout the three generations during both years.