Parasitic efficiency of some hymenopterous Aphytis spp on the purple scale insect Lepidosaphes beckii Newm.
1987
Hafez, M.B. (Alexandria Univ. (Egypt). Dept. of Plant Protection) | El-Minshawy, A.M. | Donia, A.R.
Lepidosaphes beckii Newm. is the most serious armoured scale insect festing citrus trees in Egypt. This purple scale is subjected to different ectoparasitic Aphytis spp. The abundance of the different stages of these parasites was studied and discussed. The large number of L. beckii parasitized by the immature stages of Aphytis spp. were associated with the increase of living scales during January and February. The highest percentage of parasitism with the immature stages of Aphytis spp. was observed during the Winter season, and the lowest percentage occurred during Spring, Summer and Autumn. Emerging of adults Aphytis spp. was high from March to August and dropped during the period from September to February
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