مقاومت آنتي زنوزي ارقام مختلف لوبيا به مگس مينوز در اتاقك رشد

Antixenosis Resistance of Bean Varieties to Leafminer Liriomyza sativae(Dip.: Agromyzidae) in Growth Chamber

Leafminer Liriomyza satiyae has been widely distributed in the world in recent years and it is presently an important pest of vegetables and ornamentals. Because of its high potential for resistance to current insecticides, the use of resistant plant varieties seem to be an effective approach in developing IPM programs for the pest. Since bean is a preferred host for Liriomyza sativae, 19 varieties of bean were examined to study the antixenosis resistance mechanism to this insect and determining the damage rate in a growth chamber at 25+1°C, 55±5% RI-I and 16:8 (light:dark) photoperiod. Bean varieties were evaluated in terms of indices such as number of feeding punctures, number of larval mines, proportion of mines to punctures and rate of damage. There was significant differences between varieties. Studied indices such as feeding punctures with larval mines (r= 0.957) and larval mines with damage rating (r= 0.869) showed high positive correlation among these varieties. Bean varieties were analyzed by cluster method based on all measured characters and were generally divided into three main groups including semi-resistant, moderately resistant and semi-susceptible. No variety was immune to the damage inflicted by L. satiyae and Parastoo as a semi-resistant variety roughly sustained 31% damage. Meanwhile, Sayyad, a semi-susceptible variety, up to 61% damage was known as the most susceptible one among studied varieties.