Growth regulators, agrochemical

A.G. Hackett, Chloroacetanilides in Metabohc Pathways of Agrochemicals Part 1 Herbicides and Plant Growth Regulators, ed. T. Roberts, Royal Society of Chemistry, Cambridge, pp. 179-218(1998). 

Marine fauna and flora, then, show great promise as a source of leads to new agrochemically useful plant growth regulators or insect control agents. 

The limited amount of research invested by the agrochemical industry into this class of chemicals is reflected in the fact that there are only a handful of fluorine-containing plant growth regulators, or PGRs as they are more commonly known. 

The acid salts and metal complexes of 99 (e.g. R = CC13, CC12F, CC1F2, perfluoroalkyl) and of 100 (e.g. X = F, Cl, Br, CN, SCN, alkylcarbonyloxy, alkyl carbonylthio, amines) were used as agrochemical fungicides and plant growth regulators, Eq. (38) [131]. 

T. Roberts (Ed.), Metabolic Pathways of Agrochemicals. Part 1. Flerbicides and Plant Growth Regulators, Royal Society of Chemistry Information Services, Cambridge, 1998. (Contributing editors on title page, D. H. Hutson, P. W. Lee, P. H. Nicholls and J. R. Plimmer.)... 

This section of the book presents a variety of synthetic experience in a wide assortment of agrochemical applications outside the standard areas. Included are such areas as strigol, pheromones, chemical hybridizing agents, and plant growth regulators (40). 

However, it is not only the first generation derivatives of individual cresols but secondary and even tertiary derivatives that have proved to be very important plant growth regulators or agrochemicals apart from their uses as household insect and pest repellents. Synthetically made pyrethroids which are replacing more costly natural pyrethrum or pyrethrins are one such example. 

Heterocycles are contained in a large number of agrochemicals . Triazoles, such as cyproconazole, are effective plant fnngicides and have mechanisms of action - inhibition of steroid synthesis - similar to those used medicinally. Other triazoles have limited antifungal activity, bnt are nseful plant-growth regulators, for example paclobutrazol. Another widely used fungicide is davicil. 

Hsu, A., C.-T., 1991,1,2-Diacyl-l-alkyl-hydrazines a novel class of growth regulators in Synthesis and Chemistry of Agrochemicals, II. ACS Symposium Series 443 (Baker, D.R., Fenyes, J.G., Moberg, W.K. (Eds) American Chemical Society, Washington D.C., 478-490. 

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