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Insecticidal Activities of Prunus mume Extract Against Rice Leaf Folder (Cnaphalocrocis medinalis Guenee)  

Park, Eun-Mi (Department of Agricultural Biology, Chonbuk National University)
Kim, Yeon-Kook (Department of Agricultural Biology, Chonbuk National University)
Hwang, Jung-Taek (Department of Agricultural Biology, Chonbuk National University)
Moon, Jong-Min (Department of Agricultural Biology, Chonbuk National University)
Hwang, Tae-Hwan (Department of Agricultural Biology, Chonbuk National University)
Lee, Jong-Jin (Plant Medical Research Center, Chonbuk National University)
Publication Information
The Korean Journal of Pesticide Science / v.14, no.4, 2010 , pp. 394-400 More about this Journal
Abstract
Insecticidal activities of methanol extracts of the different parts of Prunus mume were investigated against the larvae of Cnaphalocrocis medinalis (C. medinalis) by topical application. The mortalities of the larvae of C. medinalis were 34% at the concentration of 4,000 ppm, 36% of 8,000 ppm, 40% of 16,000 ppm and 58% of 32,000 ppm of the extracts from the fruits, and 38% of 4,000 ppm, 45% of 8,000 ppm, 58% of 16,000 ppm and 75% of 32,000 ppm from the stem + flower of Prunus mume (P. mume), respectively. The rates of pupation of C. medinalis treated with either fruit or stem+flower were gradually low according to the concentration of extracts increased. The weight of pupae of C. medinalis has no significantly different in between the control and the treated groups of the extracts from both of fruit and stem+flower. However, the differences of the pupal weight and the rate of pupation of C. medinalis treated with the extracts from the stem+flower and fruit of P. mume were significant as the level of 56% ($R^2$=0.56363, P=0.4364). Both of stem+flower and fruit extracts of P. mume showed good effects of anti-feeding against C. medinalis. The extracts of the stem+flower of P. mume could be advocated for developing as birational agent for the control of C. medinalis.
Keywords
Prunus mume; Cnaphalocrocis medinalis; Insecticidal activities;
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