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Synthesis and Activity of Novel Acaricidal/Insecticidal 2,4-Diphenyl-1,3-oxazolines
Junji SUZUKI, Tatsuya ISHIDA, Yasuo KIKUCHI, Yoshiaki ITO, Chiharu MORIKAWA, Yokichi TSUKIDATE, Isao TANJI, Yasuhiro OTA and Kazuya TODA
J. Pestic. Sci.
27, 1-8 (2002)
A series of substituted 2,4-diphenyl-1,3-oxazolines were synthesized and their acaricidal and insecticidal activities were examined. When either or both of the ortho-positions of the 2-phenyl group was substituted with halogen(s), an acaricidal activity against two-spotted spider mites (Tetranychus urticae) was observed as an effect on their eggs (ovicidal activity). Hydrophobic substituents at the para-position of the 4-phenyl group of 2-(2,6-difluorophenyl)-4-phenyl-1,3-oxazoline enhanced the acaricidal activity, and induced an insecticidal activity against green rice leafhoppers (Neophotettix cincticeps), diamondback moths (Plutella xylostella), and green peach aphids (Myzus persicae). When the 1,3-oxazoline ring was exchanged to either 1,3-oxazole or 4-methyl-1,3-oxazoline, both acaricidal and insecticidal activities were significantly decreased.
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