Biodegradable pesticides

Of the salts of N-lauroyl-L-valine only the sodium and the potassium salts were active (Homma et al., 1973b). 

The fungicide N-lauroyl-L-valine does not pollute the environment, because the N-acyl bond of the complex is easily ruptured, and the two components are rapidly degraded by microorganisms (Misato et al., 1974). 

A broad study concerning other derivatives of amino acids and peptides, such as triazine and benzimidazole derivatives, has been started (Maekawa et al., 1975). Of the triazine derivatives, few have shown any decisive fungicidal action. However, 

Other food additives have also shown an antifungal effect, for example oxalic acid, saccharin and its sodium salt, erythorbic acid and its salts, acrylamidated and hydroxyethylated starch. Saccharin (46) in an aqueous solution of 2000 mg/kg protects rice from infestation by Piricularia oryzae fungi (Misato et al., 1973). 

(1979) Proceedings British Crop Protection Conference, Pests and Diseases, Brighton, The Boots Co. Ltd., Nottingham, 2, 311. 

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Shafik TM, Sullivan HC, Enos HR. 1973b. Multiresidue procedure for halo- and nitrophenols. Measurement of exposure to biodegradable pesticides yielding these compounds as metabolites. J Agr Food Chem 21 295-297. 

Gerstl Z, Yaron B (1983) Behavior of bromacU and napropamide in soils. 11. Distribution after application from a point source. Amer J Soil Sci 47 478 83 Gerstl Z, B Yaron, Nye PH (1979a) Diffusion of a biodegradable pesticide as affected by microbial decomposition. Soil Sci Soc Am J 43 843-848... 

The comparative figures for methoxychlor, a biodegradable pesticide, were 1343 and 206, respectively. Although it is... 

Shimabukuro, R. H. Lamoureux, G. L. Frear, D. S. Pesticide Metabolism in Plants Reactions and Mechanisms, Proceedings of the US-India Seminar on Biodegradable Pesticides, April 16-19, 1979, Lucknow, India. 

Biodegradable pesticides can be extremely persistent when present in the soil at unusually high concentrations (6-10), which contributes to an increased risk of surface and ground water contamination. When a business has a major contamination incident, state or federal regulatory agencies can order a cleanup, but such action is more difficult for private farms and residences. The nature of the cleanup is more problematic. Contaminated soil is excavated and removed to a "secure" landfill. The end result is perhaps a cleaner site, but the waste has not been detoxified. 

A similar relationship was also found in the microbial degradation of various halogenated phenols (Alexander and Lustigman, 1966). Further investigation of such structural correlations may create good possibilities for the preparation of biodegradable pesticides of shorter life. 

Biodac. [GoldoiCat] Biodegradable pesticide carriers and diluents. 

A biodegradable pesticide is one that is quickly converted to harmless products by microorganisms and natural processes. Pyrethrins are an example of a class of biodegradable insecticides. An example of a pyrethrin is shown here. 

Hydrogen sulfide is used commercially to purify hydrochloric and sulfiiric acid, to precipitate sulfides of metals, and to manufacture elemental sulfiir and organosulfur compounds. Chemical production processes using hydrogen sulfide include the manufacture of mercaptans pharmaceuticals plastics adhesives television, cathode ray tubes (CRT), and fluorescent tube phosphors dyes pigments biodegradable pesticides ethylene nylon soda ash sodium hydrosulfide heavy water and others. 

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