21. Advocates for Colombians exposed to the fumigant have charged that it caused a variety of ill effects. 22. Elimination of the agent from contaminated soils typically involves the use of toxic fumigants with limited success. 23. It is used mainly in farming as a pesticide, specifically as a preplant fumigant and nematicide. 24. A fumigation system can be used to administer a fumigant ( normally phosphine ) to the silo. 25. Wilson said banning the fumigant would strike a severe financial blow to the state's agricultural industry. 26. The concrete floor was sprayed with a strong fumigant , probably DDT, to combat mosquitoes and scorpions. 27. Mercedes said six in the group died after a fumigant or similar substance was sprayed into the hold. 28. There is also a fumigant known as paradichlorobenzene ( PDB ) that is used to destroy these moths. 29. Once the tarp is removed it can take from a few hours to overnight for the fumigant to dissipate. 30. Chemicals, such as those used in refrigeration, in fumigants and fuel additives are believed to destroy ozone.
