ENGLISH: ILLINOIS TREES: THEIR INSECT ENEMIES 



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in large quantities by the aphids, makes the leaves sticky and 

 drips on objects under the tree. Sooty mold often grows in the 

 honey dew and causes the leaves and other objects it covers to 

 appear black. 



Control Measure 3 (end of circular). 



WALNUT 



Walnut Caterpillar, Datana integerrima G. & R., fig. 47. — 

 The larva of this species, a large, black caterpillar with gray 



Fig. 47. — Walnut caterpillar: a colony of larvae. Walnut caterpillars, 

 reddish when small, later have black bodies covered with white hair. They 

 may completely strip the foliage from the trees they infest. 



