نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه گیاهپزشکی، واحد خوی، دانشگاه آزاد اسلامی، خوی، ایران.
2 گروه گیاهپزشکی ، دانشکده کشاورزی، دانشگاه محقق اردبیلی ، اردبیل، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Rapeseed Brassica napus is one of the oilseed plants of interest to farmers in Iran. Cabbage waxy aphid Brevicoryne brassicae is one of the important pests of rapeseed all of the world and one of the main methods to protect plants against aphids is using resistant genotypes. In order to evaluate the resistance of twenty-one canola genotypes to cabbage waxy aphid, a study was conducted (at 27.5±2ºC, 60±10% RH, 14L: 10D) under greenhouse conditions. To evaluate canola genotypes antibiosis, the genotypes were planted in pots in 10 replications and based on a completely random design. Net reproductive rate (R0), intrinsic increase rate (rm), finite increase rate (λ), mean generation time (T), doubling time (D) of the cabbage waxy aphid, and pre-mature period length were calculated in greenhouse conditions. The results of the variance analysis of studied data showed statistically significant difference at least at the probability level of five percentage (P ≤0.05). The intrinsic increase rate of cabbage aphid population on Geronimo and Okapi genotypes had the highest and lowest values of 0.287 and 0.215 (female/female/day), respectively. Okapi and Geronimo genotypes had the lowest (16.5 female/female/generation) and the highest net reproductive rate of cabbage aphid (36.75 female/female/generation), respectively. In this experiment, Geronimo was observed as the most sensitive and Opera and Okapi as the most resistant genotypes in comparison with other experimental genotypes.
کلیدواژهها [English]
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