COUNTING THE MOST IMPORTANT PARASITES ON WEED LEAF MINER AND PARASITOID EFFICIENCY

K. F, Sawsen

	COUNTING THE MOST IMPORTANT PARASITES ON WEED LEAF MINER AND PARASITOID EFFICIENCY
The Iraqi Journal of Agricultural Science
Article 1, Volume 40, Issue 5, 2009, Pages 76-81
Author
Sawsen K. F
Abstract
The research aimed to identify the types of parasites that restrict population density of leaf miner on in experiment canducted at the laboratories of Biological control unit during the period from February to May for two years 2007 and 2008. Eight species of parasites were recorded on. Their occurrence was different between the two years .During first year (2007) , the number of species was Neochrysochairs formosa, Cirrospilus vittatus, Pediobius acantha and Diglyphus iseae whereas it was Neochrysochairs formosa, Cirrospilus vittatus, Pediobius acantha, Diglyphus iseae, Halticoptera circulus, Ratzeburgiola incompleta, Pediobius acantha, Opius sp and Diaeretiella rapae during the second year (2008) . In addition to the species that had already recorded this study showed occurance at 14 parasites on 2007 during and 13 parasites 2008 during. The relation between parasites and borer population on density show that high parasites population associated with less borer population. It was show on that more population density of parasites was associated with less population density of the host .The total percentage of parasitism were 62% and 56% in 2007 and 2008 respectively , and the high percentage of parasitism for Neochrysocharis formosa were 35% and 46% during 2007 and 2008 respectively , whereas the less percentage of parasitism for Haltbicoptera circulus and Diaeretiella rapae were 14% during 2007 and 2% Cirrospilus vittatus during 2008 respectively .

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