Four years of experimental work has indicated that a 25 % zinc ethylene bisdithiocarbamate dust has an effect on weather fleck of shade grown tobacco. Since this type of dust already has application in blue mold control work, it can in effect be made to perform two functions in the field; that is, (1) the control of blue mold, and (2) the control of fleck. As our fleck prediction technique becomes more accurate, it is hoped that control will become more complete. These results indicate to us that the application of dusts or sprays to tobacco plants in a regular schedule or a prediction schedule may be used as a new approach in the control of weather fleck. It is hoped that more work can be done on the use of other chemicals especially anti-oxidants, so that we may achieve better control than we have at the present time.

(Full article published with kind permission from "Tobacco International")