Different potato (Solanum tuberosum L.) cultivars mediated life-history variables of the potato leafminer, Liriomyza huidobrensis (Blanchard) (Diptera: Agromyzidae)

초록

Liriomyza huidobrensis (Blanchard) is an emerging pest of potatoes in Korea. Host selection is crucial for the survival of leafminer as immatures have limited mobility and selection is often influenced by the host quality. A potato choice made by leafminer is guided by cultivar characteristics. To determine the effects of potato cultivars on the life variables of leafminer, a feeding preference of adult leafminer was examined by offering a choice of 21 different potato cultivars: 'Superior', 'Hongyeong', 'Seohong', 'Chuyeong', 'Chudong', 'Jinseon', 'Bangui', 'Saebong', 'Jowon', 'Goun', 'Jopung', 'Hongseon', 'Dejima', 'Atlantic', 'Jayeong', 'Namseo', 'Chubake', 'Haryeong', 'Jeseo', 'Oryun', and 'Minseo'. The preference and performance of adult leafminer were varied significantly among cultivars. L. huidobrensis showed a preference for the Goun cultivar. Adult showed poor performance toward less attractive and poor in quality cultivars such as cv. Oryun. There was a significant relationship between choice and performance, and between plant morphology and performance. The results suggest that higher preference and performance of L. huidobrensis on cv. Goun and least on cv. Oryun might be governed by morphology as well as chemical attributes of potato cultivars. These variables estimated in this study can serve as a basis for selecting potato cultivars with resistant characteristics and can be applied as a pest management tool for leafminers at minimal costs. However, field experiments are needed to obtain concrete information about leafminer behavior relative to potato cultivars.

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