SEASONAL ABUNDANCE AND CONTROL STUDIES OF TWO DIASPIDID SCALE INSECTS INFESTING APPLE TREES IN EL-GHARBIYA GOVERNORATE. | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 12, Volume 27, Issue 1, January 2002, Page 691-701 PDF (673.8 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2002.253294 | ||||
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| Authors | ||||
| Yusria, I. Kasim1; A. A. El-Dash2 | ||||
| 1Plant Protection Institute, Agriculture Research Center, Dokki, Giza, Egypt. | ||||
| 2Economic Entomology and Agric. Zoology Dept.Faculty of Agric., Menoufia Univ., Shebin EL-kom, Egypt. | ||||
| Abstract | ||||
| Seasonal abundance of Parlatoria ziziphus (Lucas) and Hemiberlisia lataniae (Sign.) was studied on apple twigs in El- Santa region (El-Gharbiya Governorate) during the period extended from January 1999 to the end of December 2000. The results obtained showed that P.ziziphus had the highest population than H.lataniae. Its maximum population size was observed in September in both seasons, while the minimum was in January in the first and second years. The favorable periods for annual increase occurred during September in both seasons for both insects. P.ziziphus had two annual generations with two peaks in May and September in both years, also H.lataniae had two annual generations with two peaks in April and September in the first and second seasons. The seasonal variation in the population in relation to climatic factors showed that the minimum and maximum daily temperature and relative humidity had a moderate effect on the population size. Malathion 57%, K.zoil and Al.kanz 2000 in three concentrations, each were tested against P.ziziphus and H.lataniae, all insecticides showed high potency on nymphal and adult female stages throughout one, two, four and six months from spraying. | ||||
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