APHIDIUS NIGRIPES و پارازيتوييد MACROSIPHUM EUPHORIBIAE با موجودات غير هدف : اثرات جانبي روي شته LEPTINOTARSA DECEMLINEATA برهمكنش گياهان ترانس ژنيك مقاوم به سوسك كلرادو

Interactions of Genetically Engineered Potato Resistance to Colorado Potato Beetle Leptinotarsa decemlineata and Nontarget Organisms: Effects on Biology of Potato Aphid Macrosiphum euphorbiae and itʹs Parasitoid, Aphidius nigripes

Fitness of potato aphid Macrosiphum euphorbiae and itʹs parasitoid Aphidius nigripes were studied when the host was reared on either of five potato lines (transgenic-BT, transgenic-OCI, NYL 235-4 and two controls) with different mechanisms of resistance to the Colorado Potato Beetle (CPB) Leptinotarsa decemlineata. Results indicated that factors of potato resistance that are currently being developed mainly against the CPB affected the nontarget organisms in different ways. BT potatoes negatively affected fitness indices of M. euphorbiae and aphid parasitoid, whereas OCI-potatoes unexpectedly improved aphid and parasitoid performance. Aphids and parasitoids were larger on OCl and smaller on BT potatoes than in controls. This difference was reflected on aphid fecundity, which was lowest on BT, and highest on OCI. Parasitoid survival was significantly lower on the BT potatoes as compared to other lines. The parasitoid developed significantly faster on ʹNYL 235-4ʹ than on other lines. The results indicate that the performance of potato aphid as a secondary pest as well as itʹs parasitoid depends on the nature of the resistance factors; factors involved while developing specific resistance to primary pests.