INJURY OF WHEAT LEAF MINER LARVAE Syringopais temperatella Led. ON TWO WHEAT VARIETIES UM -RABEE & TELL-AFAR

Abstract

A field experiment was conducted out of college of agriculture and forestry during the growing season of 2007- 2008. The aim of the present study is to determine the damage of the larvae of wheat leaf miner larvae Syringopais temperatella Led., for two wheat varieties Um-RAbee & Tell-Afar3.. The result of this research revealed that the percentage of infested plants and leaves were positively proportional with increasing the number of larvae and negatively to the crops components. The injury was more obvious with the bread wheat variety (Tell-Afar 3) in which it was observed that the larvae favorites this variety more than the other one especially when added 100 larva / m2 at 12 / 4 / 2008 in percentage of infested plants & leaves reached 96.66 and 90.79 % respectively. Moreover, Tell-Afar3 variety gave the lowest values in the characteristics (leave area, weight of flag leave, weight of biological yield, number of spikes, length of spike, number of grains in spike, weight of 1000 grains, and grain yield ) with an averages of (9.07 cm 2, 0.046 mg, 425.00 g/m2, 200.00 spike / m2, 2.65 cm, 7.56 grain / spike, 33.18 g and 144.00 g/m2), for each, respectively. Whereas the durum wheat variety Um-RAbee was less favorite from larvae in which it was reflected in the percentage of number of infested plants and leaves plants and yield components in which the lowest percentage of infested plants and leaves were 83.33 and 67.89 % ,respectively. As well as it was showed increase in the characteristics (leave area, weight of flag leave, weight of biological yield, number of spikes, number of grains in spike, weight of 1000 grains, and grain yield ) with an average mean of (10.87 cm 2, 0.057 mg, 480.00 g/m2, 216.33 spike /m2, 9.30 grain / spike, 38.55 g and 167.63 g/m2) for each, respectively.