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EFFECTS OF AGROCHEMICALS ON BROWN PL THOPPER NILAPARVATA LUGENS (STÅL) AND ITS PREDATORY ENEMIES *
Author(s) -
Chen Jianming,
Yu Xiaoping,
Lu Zhongxian,
Zheng Xusong,
Cheng Jiaan
Publication year - 1999
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.1999.tb00162.x
Subject(s) - brown planthopper , butachlor , biology , nymph , toxicology , acetochlor , predation , pesticide , botany , ecology , biochemistry , weed control , gene
Abstract The effects of agrochemicals on brown planthopper (BPH), Nilaparvata lugens , three predators were studied. The results showed that with recommendatory concentrations of 0. 30preti‐lachlor EC could cause high mortalities to adults of BPH, Microvelia horvathi and Cyrtorhinus lividipennis; 0. 50 butachlor EC had significant lethal effects on adults of M. horvathi and C. lividipennis , but had negligible effects on BPH and Erogonidium graminicolum; and 40% acetochlor WP had no obvious killing effect to other insects mentioned above, except C. lividipennis . Effects of 0. 50 quincolorac WP, 0. 10 bensulfuron methyl WP, 0. 10 cyclosulfumuron WP and 0. 20 daofuxing WP on these insects were insignificant. As far as fungicides were concerned, 2nd‐3rd instar nymphs of BPH and adults of Microvelia horvathi , and Cyrtorhinus lividipennis were obviously sensitive to 0. 40 IBP EC, but 0. 75 chlorothalonil WP 0. 20 tricyclazol WP, 0. 50 carbendazin WP, 0. 25 yekuling WP, 0. 5 jinggangmycin SL and 0. 20 yeqing shuang WP had no evident effects on them. 0. 4635 urea G had also no obvious insecticidal activity on adults of these insects. The results of toxic regression expression and LC 50 of IBP, pretilachlor, butachlor and acetochlor to BPH and its predators were determined.