Download PDF by C.R.A. Godfrey: Agrochemicals from Natural Products (Books in Soils, Plants,

By C.R.A. Godfrey

ISBN-10: 0585400245

ISBN-13: 9780585400242

ISBN-10: 0824795539

ISBN-13: 9780824795535

Deals a radical review of the $64000 agricultural functions of either average items and artificial compounds derived from average items, featuring exact details at the isolation, structural stories, organic job and toxicology of those compounds. The increasing sector of insecticidal normal items is highlighted.

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Extra info for Agrochemicals from Natural Products (Books in Soils, Plants, and the Environment)

Sample text

Their distribution and biological activities along with the structures of 167 isolated compounds has been reviewed[182]. Outside of the precocenes, 6,7-dimethoxy-2,2-dimethylchromeneand 7methoxy-2,2-dimethylchromene,noted for their ability to induce precocious metamorphosis in some insects by destroying the gland that secretes juvenile hormone [183], several other chromenes have attracted attention as insecticides. , 6-acetyl-7-methoxy-2,2-dimethylchromene (encecalin, W),6-acetyl-7-hydroxy-2,2-dimethylchromene (91), and 6-acetyl-2,2-dimethylchromene(92, Figure 18) [184].

Of a series of benzoyl esters, the 3,5-dimethoxybenzoyl derivative (28) was most active. 51 pg/g to houseflies (pretreated with piperonyl butoxide) and milkweed bugs (Oncopeltus faxiatus), respectively. 6 pg/g, respectively, in the same test. 51 &g doH 27 6 5 R= =M H 3,4-(MeO),PhCO e s R0 1 * i 6H OH OH veracevine 2 8 R e 3,5-(MeO),PhCO OH 29 R =H 3 0 : R-OH ProtoveratrineA ProtweratrineB Figure 7 Insecticidal Veratrum alkaloids. (From Ref. ) veratridine 16 ADDOR for milkweed bugs. 5 mg/kg, respectively, by intraperitoneal administration.

Results of early field tests with 47, designated as AC 303,630, have been published [96]. Necessary efficacy, toxicological, and environmental studies to support registration ofAC 303,630 for use on a variety of crops and ornamentals are being advanced[96]. The synthesis of AC 303,630 has been described by Kuhn and co-workers [97]. G. Stemofoline Extracts of the roots of Stemonaceae plants have been used forthe control of agricultural insects in China [98]. , shown by Irie and co-workers to have structure 48 (Figure 61, has been found to be the major insecticidal component [99].

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Agrochemicals from Natural Products (Books in Soils, Plants, and the Environment) by C.R.A. Godfrey

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