زیست‌ شناسی سوسک چهار نقطه‌ای حبوبات،Callosobruchus maculatus (F.) ، روی رقم‌های مختلف عدس

Lentil (Lens culinaris Med) is among the important crops of Leguminosae and, on average, contains 22% protein. The cowpea weevil (Callosobruchus maculatus F.) is a storage and field pest of legume seeds which cause significant economic damage to these products all over the world, particularly in tropical and subtropical regions. Although the use of fumigants is a common method in pest management, their application led to detrimental side effects on human and non-target organisms. Therefore, the introduction of effective and low-risk methods in pest management is necessary. The use of resistant varieties is one of the effective methods in the integrated management of agricultural pests. Also, studying the biological and demographic parameters of pests is one of the most important factors in evaluating the sensitivity or resistance of host plants against them. In the present study, the effect of different lentil cultivars, including perkoz, gachsaran, sana, sepehr, and bileh-savar, on the biological and demographic parameters of cowpea weevil was assessed. All the experiments were done in the rearing chamber with 30 ± 1 °C, 65 ± 5% relative humidity, and complete darkness. The obtained results indicated that the survival percentage of the pest on the Bileh-savar cultivar was the lowest (70%). The longest pre-adult period was related to the Bileh-savar (29.92 days), Gachsaran (28.52 days), and Sepehr (28.40 days) cultivars. Fecundity was the lowest on Bileh-Savar (59.33 eggs) and Sepehr (59.94 eggs) cultivars. The lowest intrinsic rate of population increase was observed on the Bileh-savar cultivar with 0.096 day-1. The mean generation time was the highest on Bileh-savar (29.97 days), Gachsaran (29.40 days), and Sepehr (29.20 days) cultivars, and the doubling time was the highest on Bileh-savar cultivar (7.21 days). Based on the findings of the present study, the Bileh-savar cultivar can be introduced as a resistant cultivar for population increase of the cowpea weevil.