The association between a monoculture crop, an established pest and a means of chemical pest control is an important consideration in modern agriculture. Collembola, in particular the Onychluridae Tullbergia krausbaueri and Onychlurus armatus, have been associated with the cultivation of sugar beet (Beta vulgaris) since 1958 (Jones and Dunning, 1972). Since the 1960's, pests of sugar beet have been controlled with gamma-benzene hexachloride (BHC). Although the association between sugar beet, Collembola and BHC has been established for some time, the specific interactions have not been evaluated by laboratory methods. The aims of this study were to clarify the plant, pest and pesticide interactions and to develop mathematical models to assist in control of the pest.

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This report discusses research in three areas of organic synthesis: The synthesis of potential insecticides; the reinvestigation of the reaction of hexamethylphosphoramide with ketoximes; and the regioselective fluoroalkoxylation and polyfluoroalkoxylation of activated dihalobenzenes and dihaloheterocycles. In Part I, a series of N-(4-heteroaryloxybenzoyl)-N'-(2, 3-dichlorobenzoyl) hydrazines are synthesized, and attempts at cyclic dehydration to the corresponding 2, 5-disubstituted-1, 3, 4-oxadiazoles are discussed. In Part II, the synthesis of N, N-dimethyl-N'-aryl amidines by the reaction of aryl alkyl and diaryl ketoximes with HMPA is discussed. In Part III, a series of activated dihalobenzenes and dihaloheterocycles are reacted with sodium trifluoroethoxide to study the possibility of regioselective fluoroalkoxylation and polyfluoroalkoxylation of these activated substances.

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