تأثیر پودر دارچین و فلفل سیاه بر سوسک چهارنقطه ای حبوبات Callosobruchus maculatus با استفاده از روش جدول زندگی

Stored product pests are one of important factors of crop loss often causing significant damage after harvest. The Cowpea weevil, Callosobruchus maculatus Fabricius (Coleoptera: Bruchidae) is one of the most important pests of beans causing the most damage to cowpea and some other legumes in Iran and most of the world. The most commonly used method to control this species is application of fumigant insecticides The use of botanical insecticides due to their low toxicity to humans, low environmental durability and reduced environmental impacts have been considered as suitable pest control tool in organic farming. In this study, the effect of 0.1 and 0.2 g cinnamon and black pepper powder in Petri dishes (6 cm diameter) on biological characteristics and population growth of C. maculatus on Cowpea was evaluated at a temperature of 28 ± 2° C and relative humidity of 50 ± 10 and full darkness in the framework of life table study. 0.1 g cinnamon powder resulted in 100% lethality on the egg stage. The larval period in control, 0.1 g cinnamon and 0.1 and 0.2 g black pepper were 26.35, 29.25, 30.23 and 29.19 days, respectively, indicating an increase in larval period of treatments compared to the control. Significant differences were observed among treatments in terms of intrinsic (r) and finite (λ) population growth rates and the mean generation time (T) between treatments compared to the control. The intrinsic rate of population increase in control, 0.1 g cinnamon, 0.1 and 0.2 g black pepper were 0.113, 0.062, 0.050 and 0.056 day-1, respectively. The net reproductive rate (R0) in all treatments showed significant difference with the control. It was 42.84, 11.48, 5.92 and 7.50 individual in control, 0.1 g cinnamon, 0.1 and 0.2 g black pepper, respectively. The highest and lowest pre-adult mortalities occurred in 0.2 g cinnamon (100%) and the control (8%). Based on their effects and safety, it is concluded that they can be used as healthy and complementary tools in IPM programs.