Table 5. — Loss of dichlorvos vapor concentrations from a wine cellar at intervals 



after treatment by a vapor generator 



Hours after 

 treatment 



Before 



1/4 

 1/2 

 1 

 2 

 4 

 6 

 8 

 24 



Dichlorvos : 



Loss of original 

 concentration 



fi^./cu. ft.- 



Percent 



0.14 



— 



4.00 







4.00 







3.63 



9 



2.00 



50 



1.63 



59 



1.38 



66 



.68 



83 



.58 



86 



.13 



97 



— Not corrected for controls. 



— ' Reading at time generator was turned off. 



15 



