Effect of two wheat varieties  Karonea & Tellafar 3 and the level of urea fertilizer in the infestation of wheat leaf miner larvae Syringopais temperatella Led.

	Effect of two wheat varieties Karonea & Tellafar 3 and the level of urea fertilizer in the infestation of wheat leaf miner larvae Syringopais temperatella Led.
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 837-844 PDF (0 K)
Abstract
It was observed from results of the effect of wheat varieties and the level of urea fertilizer in the infestation of (wheat leaf miner larvae), that the durum wheat variety (Karonea) was more tolerant to the infestation, where the lowest percentage of infestation was recorded for the infested plants and leaves at the first date of sampling in 15 / 3/2008 besides the number of canals that contain living larvae at 12/4/2008 especially when adding the recommended quantity of Urea fertilizer (control) which was 20 kg/Donem with a percentage of (80.00 and 50.38)% and (12.67 tunnel / 20 plant) , respectively , this was positively reflected in the dry weight of wheat plants. Thus, the highest weight was recorded with adding the recommended quantity with an average of (0.27mg/ 20 plant), while the variety of soft wheat variety (Tellafar 3) was lower in resistance to infestation, and the percentage of the infested plants and leaves was higher than those in the (Karonea) variety with a percentage of (88.33 and 67.28) % , respectively, besides it was characterized by a largest number of canals with living larvae at 29/3/2008 with an average of (53.33 tunnel/20plant), besides, the increase in Urea fertilizer added at a rate of (25kg / Donem), was proportional to the infestation and inversely with the dry weight of wheat plants in both varieties especially in the variety (Tellafar 3) as all the wheat plants were infested starting from 22/3 until 12/4/2008 besides all the leaves were infested and the largest number of canals containing living larvae at the date of 29/3/2008 with an average of (830.76 larvae /20 plant), and the lowest weight was shown for the variety mentioned above with an average of (0.11 mg / 20 plant) especially when adding an additional rate of urea fertilizer .

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