Reference

Insecticides with inhibitory effect of the ecdysis of insects

Insecticides with inhibitory effect of the ecdysis of insects. Nakagawa, Yoshiaki; Fujita, Toshio (Fac. Agric., Kyoto Univ., Kyoto 606, Japan). Kagaku (Kyoto), 41(3), 194-5 (Japanese) 1986. CODEN: KAKYAU. ISSN: 0451-1964. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Insecticides which disturb physiol. function, esp. ecdysis, were found among benzoylphenylurea compds. and natural products. Du 19111 (I) [35377-46-9] inhibited larval ecdysis of Pieris brassicae. Chlorfluazuron [71422-67-8] was ~10-fold more inhibitory than diflubenzuron [35367-38-5] on ecdysis by Spodoptera litura. For Plutella maculipennis, CME 134 (II) [83121-18-0] was ~20-fold more inhibitory than diflubenzuron. These compds. prevented the biosynthesis of chitin [1398-61-4]. Buprofezin [69327-76-0] did not have marked insecticidal effect on Diptera, but was active against Hemiptera due to the inhibition of chitin incorporation into N-acetylglucosamine [7512-17-6]. Plumbagin [481-42-5] was extd. from the root of Plumbago capensis grown in Africa, and at 400 ppm was 90% lethal against Pectinophora gossypiella. L-Alanosine [5854-93-3] was extd. from the incubation medium of actinomycetes, and at 50 ppm inhibited the ecdysis of Leucania separata due to the inhibition of cuticular protein synthesis required for the sclerotization of the epidermis.Except for chemicals metioned above, 1398-61-4 and 5854-93-3 are also used. .

Degradation of buprofezin in flooded and upland soils under laboratory conditions

Degradation of buprofezin in flooded and upland soils under laboratory conditions. Funayama, Shunji; Uchida, Matazaemon; Kanno, Hideo; Tsuchiya, Katsuo (Inst. Life Sci. Res., Nihon Noyaku Co., Kawachinagano 586, Japan). Nippon Noyaku Gakkaishi, 11(4), 605-10 (English) 1986. CODEN: NNGADV. ISSN: 0385-1559. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemical Bioregulators) Degrdn. of buprofezin (I) [69327-76-0] in soils was studied with phenyl-U-14C-labeled I. I was gradually degraded in soils under both flooded and upland conditions with half-lives of 104 and 80 days, resp. Major products found 150 days after treatments under both conditions were II [69329-95-9], III [107484-84-4], 1-tert-butyl-3-isopropyl-5-phenylbiuret [107484-83-3], 1-isopropyl-3-phenylurea [19895-44-4], and phenylurea [64-10-8]. 107484-86-6 and 69329-95-9 which are cas registry numbers of chemicals are mentioned. IV [107484-85-5] and V [107484-86-6] were found as minor products under flooded and upland conditions, resp. Soil-bound 14C found 150 days after treatment and 14CO2 evolved during the 150 days accounted for 13-21 and 23-24% of the applied 14C, resp. Sterilization of soil markedly retarded I degrdn. and stopped 14CO2 evolution, suggesting that mineralization of I was attributable to microbial action. .