By C.R.A. Godfrey
Bargains an intensive assessment of the $64000 agricultural functions of either usual items and artificial compounds derived from average items, offering certain details at the isolation, structural reports, organic task and toxicology of those compounds. The increasing region of insecticidal average items is highlighted.
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Extra info for Agrochemicals from Natural Products (Books in Soils, Plants, and the Environment)
196 mg/kg). The novel nitro-containing nucleoside clitocine (123, Figure 23), isolated from the mushroom Clifocybe inversu, was claimed to have strong activity againstthe pink bollworm (Pectinophm gossypiella) . Its synthesis has been reported . From the edible mushroom Tricholomu muscurium Kawamura, tricholomic acid (124) was isolated as the active compound againstflies . Tricholomic acid and its threo isomer were both synthesized . The latter cornpound showed neither the flyiadal activity nor the good taste attributed to tricholomic acid.
In the more recent work [123, 1291, dure involved methylene chloride extractionof the fermentation broth followed by concentration and fractionation first onsilica gel and then by reverse-phase HPLC. By using activity againstthe tobacco budworm (Heliothis veriscens) as a guide, the Gupta group was able to isolate 10 of the destruxins from their M. unisopliue culture . Early work indicated that destruxins A and B were active against silkworms by injection only. They were inactive topically and larvae refused to eat mulberry leaves sprayed with aqueous solutions .
Tenuazonic aad (119, Figure 23) was isolated from cultures of the fungus Alternaria tenuis using a larvacide test with Luciliu m'cufa as the screen . Follow-up synthesis work in an attempt to improve potency and activity spectrum affordedthe bis-aryl analog 220 as among the best, but improvement was only marginal . Using the European corn borer (Ostriniu nubilulis) as a bioassay, the cardiotonic glycosides nerifolin (122) and 2"acetylnerifolin (222) were isolated from theseeds of the yellow oleander [ T h e v e t i a fhewfioides (HJ3K) K.
Agrochemicals from Natural Products (Books in Soils, Plants, and the Environment) by C.R.A. Godfrey