SESONAL A BUNDANCE OF ALEUROCLAVA JASMINI WHITEFLY AND ITS ENEMIES ON SOME CITRUS SPECIES IN WASET PROVINCE

S. Manjy, M.

	SESONAL A BUNDANCE OF ALEUROCLAVA JASMINI WHITEFLY AND ITS ENEMIES ON SOME CITRUS SPECIES IN WASET PROVINCE
The Iraqi Journal of Agricultural Science
Article 1, Volume 46, Issue 2, 2015, Pages 254-261
Author
M. S. Manjy
Abstract
The study carried out in a citrus orchard located at Al-Numaniyah District/ of Waset Province for the period from March to December 2012 to estimate the population density of nymphs of jasmine whitefly, Aleuroclava jasmini and its natural enemies on bitter orange (Citrus sinensis L.), sweet orange (Citrus aurantium L.) and Mandarin orange (Citrus reticulata). Results showed that the pest preferred the lower height level of the trees of bitter orange, Mandarin orange and sweet orange. Results showed significant differences in the numbers of nymphs on the upper level of the orange tree (200 nymphs/cm2) comparing with 170.4 and 138.5 nymphs/cm2 on sour orange and Mandarin orange respectively. The less means were 27.75, 18.5 and 60.5 nymphs/cm2 respectively. The predator Chrysoperla carnea significantly exceeded the numbers of rest predators in the situation of study, where the highest rate in July on the bitter orange, Mandarin orange and sweet orange 25.5, 33.5 and 14.6 adult/sample respectively. The lowest rates in March were 7.4, 10.2 and 14 adult/sample respectively. There are other natural enemies was found as ladybirds, Coccinella septempunctata and Coccinella undecimpunctata, , Encarsia sp. Clitostethus arcuatus, and predacious mite Pronematus sp.
Keywords
Aleuroclava jasmin; Chrysoperla carnea; orange

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