cis- and trans- 1,3-Dichloropropene (gamma-Chloroallylchloride or 1,3-Dichloropropylene) are major active ingredients of Shell D-D and Tolone II, commercial products for control of plant-parasitic nematodes. 1,3-Dichloropropenes which evaporate from soil go into the atmosphere and have a significant effect on the total air pollution caused by chlorinated hydrocarbons in The Netherlands (Van Rijn et al., 1995. Handbook Bestrijdingsmiddelen: gebruik & milieu-effecten, p.629-632). Shell D-D and Tolone II also represent an important class of carcinogenic water pollutants. Both the cis- and trans- isomers of 1,3-Dichloropropene can be converted to the corresponding 3-Chloro-2-propene-1-ols and 3-Chloroacrylic acids (Roberts et al., 1976. Pestic. Sci. 7:325-335). These pathways are found in Pseudomonas cichorii strain 170 ([http://www.ncbi.nlm.nih.gov/pubmed/9687453|Poelarends et al., 1998]). The first step of these pathways, hydrolysis of 1,3-Dichloropropenes to 3-Chloro-2-propene-1-ols, can also take place abiotically in soils (Castro et al., 1966. J. Agric. Food Chem. 14:69-70) (Van Dijk, 1974. Agro-Ecosystems 1:193-204).