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A leaf of flue-cured tobacco damaged by aphids. Part of the leaf is black from mildew growing 



on the honeydew excretion. 



In Tennessee, Maryland, and 

 the Northern States, the aphids 

 may increase all summer, and 

 most of the damage occurs late in 

 the season. In warm weather they 

 may reproduce so rapidly on the 



lower leaves that severe damage 

 occurs before the grower notices 

 them. When the temperature is 

 higher than 95° F. for several 

 days, many aphids die, and danger 

 of severe injury is reduced. 



