Journal of Plant Diseases and Protection (2010) 117, 261-267

Nabil El-Wakeil, Nawal Gaafar and Christa Volkmar (2010)
Susceptibility of spring wheat to infestation with wheat blossom midges and thrips
Journal of Plant Diseases and Protection 117 (6), 261-267
Abstract: Susceptibility of spring wheat to infestation with wheat blossom midges (WBM) and thrips was studied in Central Germany in the two seasons, 2008 and 2009. WBM Sitodiplosis mosellana , Contarinia tritici and the thrips species Limothrips denticornis and L. cerealium are among the major pests of wheat ears. Pheromone traps were used for surveying S. mosellana adults. Ear-infestations in the wheat varieties Triso (high quality in Germany) and Sakha 93 (resistant to drought in Egypt) were evaluated by counting insects at flowering stage (GS 65) and the milk-ripe stage (GS 73). Migrating WBM larvae were evaluated using water traps. In the pheromone traps, density of S. mosellana adults started high and then the population steadily declined until the end of the season. There was no significant difference in the total number of thrips and WBM larvae between varieties at GS 65 in either year, while differences between varieties at GS 73 were significant. Thrips and WBM larvae numbers were significantly higher in Triso than Sakha 93 in 2008 and 2009. The infested ears were positively correlated with WBM counts in both varieties. Numbers of migrated yellow midge larvae were higher in 2008, but lower in 2009 than orange midge. Yield was higher in Triso than Sakha 93 in both seasons.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Nabil E. El-Wakeil

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Contarinia tritici	Wheat (Triticum)	Germany
	Sitodiplosis mosellana	Wheat (Triticum)	Germany
	Limothrips cerealium	Wheat (Triticum)	Germany
	Limothrips denticornis	Wheat (Triticum)	Germany