Release of these compounds was a function of the decomposition process. Various products and intermediaries were produced and dissipated in a chemical cascade. In conjunction with soil heating, the formation and release of these biotoxic volatile compounds occurred mainly during the first three weeks of solarization. After that time, concentrations of most compounds dropped to low or undetectable levels. Feasible alternatives to chemical soil fumigants must provide effective, predictable, economical, and relatively rapid reductions of pest and disease organisms.
Solarization has limitations which prevent it from universally replacing fumigants.
However, in suitable climates and for compatible applications, solarization alone, or in combination with other agents, is ready for implementation. References Becker, J.O., and Wrona, A.F. 1995. APS Press, St. Paul. Bell, C.E., and Laemmlen, F.F. 1991. Soil solarization in the Imperial Valley of California.