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Distribution of Agamermis unka (Nematoda: Mermithidae), a Mermithid Parasite of Brown Planthopper (Nilapawata lugens) in Korean Rice Paddies  

이동운 (경상대학교 농생물학과, 응용생명과학부, 농업생명과학원)
조성래 (경상남도농업기술원 기술보급과)
추호렬 (경상대학교 농생물학과, 응용생명과학부, 농업생명과학원)
김형환 (농촌진흥청 원예연구소 원예환경과)
Publication Information
Korean journal of applied entomology / v.41, no.2, 2002 , pp. 129-136 More about this Journal
Abstract
Agamermis unka, a mermithid parasite of brown planthopper (BPH), Nilaparvata lugens, is the most important natural enemy of BPH and white-backed planthopper (WBPH), Sogatella furcifera in Korea. Distribution of A. unka was investigated in Korean rice fields from 1992 to 1998 and in 2001. Overwintering population of A. unka in Gosung, Namhae, and Tongyoung from 1992 to 1998 was different depending on locality and year. In the survey of A. tanka distribution in the spring of 2001, A. unka was found only at Jangheung and Haenam in Jeonnam province and Namhae, Jinju, Sancheong, Sacheon, Gosung, Tongyoung, Uiryeong, Changwon, Gimhae, and the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services at Jinju in Gyeongnam province out of 30 observed regions in 5 provinces. The number of A. unka was 1,045/㎥ at Namhae, 947/㎥ at the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services, and 395/㎥ at Gosung. Density of A. unka at the rice paddies of Gyeongnam province after harvest in 2001 was higher at the rice fields of Namhae, Gosung, and the experimental field of Gyeongsangnamdo Agricultural Research and Extension Services. Although density of A. unka was higher in the pesticide-untreated plots than fungicide-treated or insecticide-treated plots of forecasting paddies, there were no significant differences. After rice harvest A. unka was found from the forecasting paddies of Gosung, Jinju, Namhae and Sacheon out of 19 observed localities in Gyeongnam province.
Keywords
Agamemis unka; Rice paddy; Distribution; Brown planthopper; Nilaparvata lugens; Agamermis unka; Nilaparvata lugens;
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