simultaneously undergoing research for information regarding questions about safety and

contamination.

 Environmental conditions are important for effective control with Telone. Youngson

(1982) found that Telone II was more readily leached from sandy soils than loam soils. Turner

(1970) discussed the influence of air space in the soil upon the effectiveness of Telone II. As

water is added to the soil, the amount of air space is decreased. This resulted in an observed

decrease in efficacy for nematode control, due to the decreased movement of the fumigant

through the pore space. It is advisable to apply the chemical during the fall, when drier

conditions exist, which allows the chemical to diffuse through the soil for increased efficacy.

This can be a limiting factor when considering planting dates and delayed use of the field (for

a brief review of information derived from the specimen labels for Telone II and Telone C-17,

refer to Appendices C-4 and C-5).


Chloropicrin

 Chloropicrin is mixed in varying formulations with methyl bromide. At low

concentrations this chemical is primarily used as a marker for escaping fumes of methyl

bromide. Use of this chemical by itself, as a soil fumigant, is cost prohibitive. However, due

to its fungicidal properties, chloropicrin when mixed with methyl bromide at higher

concentrations is effective in the control of soilborne diseases. This chemical is not considered

to be as effective as a herbicide, nematicide, or insecticide as compared to methyl bromide

(Noling and Overman, 1988) (for a brief tabular review of information derived from the

specimen label for Chloropicrin, refer to Appendix Table D).