DOWNY MILDEW OF TOBACCO 7 
are occasionally severely burned by the spray, but this injury is 
usually soon outgrown. Spraying should be stopped a week before 
transplanting, however, as there is evidence that plants heavily 
sprayed just before they are set out may not live as well as those not 
sprayed. It is never advisable to dip roots or tops of plants in Bor- 
deaux mixture. 
In spraying, care must be taken to insure that the mixture is 
properly and freshly prepared from suitable materials. Instruc- 
tions on these points can be secured from the county agricultural 
agents, the State colleges and experiment stations, or the United 
States Department of Agriculture. The leaves of the plants should 
be dry but not wilted, and the spray must be applied with good pres- 
sure as a fine mist. For best results it will probably be necessary to 
cover both lower and upper leaf surfaces. The cloth should be kept 
off until the spray application is dry. 
