Efficacy of 1,2-Dibromo-3-chloropropane for Control of Meloidogyne javanica as Influenced by Concentration, Exposure Time and Rate of Degradation
Abstract
Laboratory experiments were conducted by applying 1,2-dibromo-3-chloropropane (DBCP) to sealed vials of soil infested with Meloidogyne javanica. A minimum initial concentration of 0.25 [mu]g of DBCP/g of oven-dry soil killed all nematodes within 35 days. A concentration of 1.0 [mu]g/g killed all nematodes within 28 days. The rate of degradation of this chemical was determined by treatment of steamed and nonsteamed dry soil in open and sealed vials. Extraction of tile chemical, followed by quantification by gas chromatography, showed approximately 100% of the amount applied recovered", after 14 days in sealed vials without soil. With soil present, approximately 10% of the amount of chemical applied was recovered. Key Words: root knot, DBCP, chemical control, fumigant, bioassay.Downloads
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