Ata, T., El-Awady, S., El-Khouly, A., Metwally, M. (2019). Population Density of the Striped Mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococcidae) on the Ornamental Corn Shrubs, Dracena fragrans in Relation to Biotic and Abiotic Factors in Al-Zohria Gardens, Cairo, Egypt. Journal of Plant Protection and Pathology, 10(2), 141-146. doi: 10.21608/jppp.2019.40911
T. E. Ata; S. M. El-Awady; A. S. El-Khouly; M. M. Metwally. "Population Density of the Striped Mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococcidae) on the Ornamental Corn Shrubs, Dracena fragrans in Relation to Biotic and Abiotic Factors in Al-Zohria Gardens, Cairo, Egypt". Journal of Plant Protection and Pathology, 10, 2, 2019, 141-146. doi: 10.21608/jppp.2019.40911
Ata, T., El-Awady, S., El-Khouly, A., Metwally, M. (2019). 'Population Density of the Striped Mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococcidae) on the Ornamental Corn Shrubs, Dracena fragrans in Relation to Biotic and Abiotic Factors in Al-Zohria Gardens, Cairo, Egypt', Journal of Plant Protection and Pathology, 10(2), pp. 141-146. doi: 10.21608/jppp.2019.40911
Ata, T., El-Awady, S., El-Khouly, A., Metwally, M. Population Density of the Striped Mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococcidae) on the Ornamental Corn Shrubs, Dracena fragrans in Relation to Biotic and Abiotic Factors in Al-Zohria Gardens, Cairo, Egypt. Journal of Plant Protection and Pathology, 2019; 10(2): 141-146. doi: 10.21608/jppp.2019.40911
Population Density of the Striped Mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococcidae) on the Ornamental Corn Shrubs, Dracena fragrans in Relation to Biotic and Abiotic Factors in Al-Zohria Gardens, Cairo, Egypt
1Dep. of Economic Entomology Fac. of Agric. Damietta University Cairo, Egypt.
2Dep. of Plant Protection. Fac. of Agric. Al-Azhar University. Cairo. Egypt.
Abstract
The striped mealybug Ferrisia virgata (Ckll.) (Hemiptera: Pseudococidae) attacks many host plants including shrubs and trees in Egypt. The aim of this work is to study the population densities of striped mealybug and the effect of biotic and abiotic factors on the insect population and the preferable direction for the insect stages on ornamental corn shrubs, Dracena fragrans in Al-Zohria gardens at Cairo during two successive years (2014-2015) (2015-2016). The results showed that the highest number of F. virgata insects occurred during Sep. in the first year, while it occurred during Nov. in the second year, with average (93.5 and 42.1 insect / sample) in the first and second years respectively. The general mean number of F. virgata has of 24.7 during the first year while it was 16.6 in the second year of investigation. The results showed that the insect population was highest in autumn with average (64.3 and 44.6 insect/ sample) in the first and second year respectively, whereas the lowest mean was in spring (2.7 and 1.5 insect / sample) during the two successive years. The data revealed insignificant relation between daily maximum, range and minimum of temperature and natural enemies on population activity. On the other hand the relation between the relative humidity and the population activities was highly significant positive correlation in both two years. In respect to preferable direction, results showed that the north-eastern direction was the preferable direction for the population activity in the both years of the study.
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