484 



THE GYPSY MOTH. 



No. 4. —May 22, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf which had been sprayed 

 with Hyannis tobacco mixture. Three died on the fourth, 

 five on the fifth and two on the sixth day. 



Is'o. 5. — May 22, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf and both sprayed with 

 Hyannis tobacco mixture. Seven died on the third, two on 

 the fourth and one on the sixth day. 



No. 6.— May 22, 1894. Ten caterpillars, before the 

 first molt, were placed in a dish and sprayed with Hyannis 

 tobacco mixture, and then put on a fresh leaf. Six died on 

 the fourth, two on the fifth and two on the seventh day. 

 The strength of the mixture used in this trial was in the 

 proportion of 1 part to 50 parts of water. 



* * SULPHO-XAPHTHOL . 



Ko. 1. — May 15, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf which had been sprayed 

 with sulpho-naphthol. Two died on the fourth, one on the 

 sixth and one on the seventh day. 



No. 2. — May 15, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf and both sprayed with 

 sulpho-naphthol. Two died on the second, one on the 

 third, one on the fifth, one on the sixth and one on the 

 seventh day. 



No. 3. — May 15, 1894. Ten caterpillars, before the 

 first molt, were placed in a dish and sprayed with sulpho- 

 naphthol, then placed on a fresh leaf. Three died on the 

 second and one on the fourth day. The strength of the 

 sulpho-naphthol used in this trial was in the proportion of 

 1 part to 100 parts of water. 



Ko. 4.— May 22, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf which had been sprayed 

 with sulpho-naphthol. Three died on the fourth, two on 

 the fifth, one on the sixth, three on the seventh and one on 

 the ninth day. 



No. 5. — May 22, 1894. Ten caterpillars, before the 

 first molt, were placed on a leaf and sprayed with sulpho- 

 naphthol. Eight died on the fourth, one on the fifth and 

 one on the sixth day. 



