212 OHIO EXPERIMENT STATION: BULLETIN 194 



KXPLANATION OF ~'LATB VI. 



Fig. 1. Horse chestnut photographed July 20, 1906, after it had been 

 defoliated by the first brood of tussock moth larvae. The larvae, 

 at the time the photograph was taken, were transforming to 

 the pupal stage, many having already completed the operation. 

 The tree was sprayed with strong kerosene emulsion and banded 

 with tanglefoot. 



Fig. 2. The same tree, as above described, 40 days later. Evidently 

 most of the larvae were destroyed by the treatment, as the tree 

 had grown a partial second crop of foliage. Compare with 

 Fig. 2, Plate VII. 



