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Relationship between Feeding Damage by Beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae) and Leaf Trichome Density of Potato
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  • Relationship between Feeding Damage by Beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae) and Leaf Trichome Density of Potato
  • Relationship between Feeding Damage by Beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae) and Leaf Trichome Density of Potato
저자명
Kwon. Min,Cho. Hyeon-Mook,Ahn. Young-Joon
간행물명
Journal of Asia-Pacific entomology
권/호정보
2006년|9권 4호|pp.361-367 (7 pages)
발행정보
한국응용곤충학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The responses (infestation level and feeding preference) of 50 potato cultivars, including seven Korean recommended cultivars to Spodoptera exigua larvae were examined in the field and the laboratory. Based on the number of potato leaves damaged by S. exigua larvae in the field, seven cultivars (Anco, Denali, Bintje, Jidose, Sandra, Shimabara, and Spunta) were found tolerant to the insect attack, whereas Nicola and Dejima cultivars were highly susceptible. In feeding preference tests using leaflets of 10 selected cultivars (Anco, Denali, Bintje, and seven recommended cultivars), no significant differences were seen among the cultivars, indicating no involvement of chemical resistance. In trichome density per $mm^{2}$ leaf area, underside leaf surface contained higher trichome densities than the upper side, and the number of long trichome were distributed four times more than short trichome on average. Total leaf trichome density was the highest on cv. Dejima of 32.1, followed by cvs. Bintje and Denali, but the lowest on cv. Jopung of 6.9. From correlation analysis, infestation level in the field by S. exigua was correlated with the density of shorter trichome on upper side of leaf surface (r=0.737* in 1996 and 0.772** in 1997 ). However, it was not correlated with the density of the longer trichome on underside.