4-Amino-6-methyl- 1,2,4-triazine-3(2H)-thione-5-0ne (1) was condensed with propargyl bromidein the presence of sodium rnethoxide to afford 3-propargylmercapto- 4-arnino-6-rnethyl-1,2,4-triazin-5-one(2) . Transformation of the latter to 8-dihydro- 3-methyl-7-methylene-4-oxo-6H-[1,2,4]TRIAZINO [3,4-b] [1,3,4] thiadiazine (3) was performed under the condition of palladium (II) salt. Ring closu...

Methyl bromide, a highly toxic and ready penetrating fumigant, is widely used against rodents, insects, mites, and a range of pathogenic organisms in soil, compost, and timber. To disinfect soil in greenhouses, methyl bromide is brought under pressure from outside by a vaporiser and blown on to ground under a polyethylene cover. The gas being three times heavier than air easily penetrates the g...

1. The mode of action of phosphine and development of insect resistance. 2. The corrosion of copper by phosphine. 3. The mode of action of methyl bromide and its relationship to insect resistance. 4. Residues of methyl bromide and the reaction products formed in treated foods. In this conununication are given some results from one of these studies, i.e. residues of methyl bromide occurring in f...

Methyl bromide is a widely used fumigant for both pre-plant and post-harvest pest and pathogen control. The Montreal Protocol and the US Clean Air Act mandate a phase-out of the import and manufacture of methyl bromide, beginning in 2001 and culminating with a complete ban, except for quarantine and certain pre-shipment uses and exempted critical uses, in January 2005. In 1995, ARS built on its...

United Nations Environment Program (UNEP) Reviews United Nations Environment Programme. 2006. Methyl Bromide Technical Options Committee. 2006 Report of the Methyl Bromide Technical Options Committee, 2006 Assessment. Montreal Protocol on Substances that Deplete the Ozone Layer. Abstract: The MBTOC addresses the technical feasibility of chemical and non-chemical alternatives for the current use...

Preplant fumigation with methyl bromide commonly is used in open-field perennial crop nurseries in California for control of plant-parasitic nematodes, pathogens and weeds. Because this fumigant is being phased out, alternatives are needed to ensure the productivity of the perennial crop nursery industry as well as the ornamental, orchard and vineyard production systems that depend on clean pla...

4-amino-6-methyl- 1,2,4-triazine-3(2h)-thione-5-0ne (1) was condensed with propargyl bromidein the presence of sodium rnethoxide to afford 3-propargylmercapto- 4-arnino-6-rnethyl-1,2,4-triazin-5-one(2) . transformation of the latter to 8-dihydro- 3-methyl-7-methylene-4-oxo-6h-[1,2,4]triazino [3,4-b] [1,3,4] thiadiazine (3) was performed under the condition of palladium (ii) salt. ring closure o...

We now have two consecutive years of yield data following soil fumigation that provided differing volumes of sterilized soil. Tarped methyl bromide at 400 lb/ac provided soil sterilization throughout the surface six feet of soil. Telone II applied in 11 foot wide strips at 50 gallons per acre provided sterilized soil to 4.5 feet deep across half the field surface area. Nine years later the yiel...