430 



THE GYPSY MOTH. 



with Paris green, in the proportion of 2 lbs. to 150 gal. of 

 water. Five died the third, two the fourth, one the sixth, 

 one the seventh and one the ninth day. 



Check experiment : one died the fourth day. 



No. 56. — June 10, 1894. Ten caterpillars, of the second 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 2 lbs. to 150 gal. of 

 water. One died the second, two the third, one the fourth, 

 four the seventh and two the eighth day. 



Check experiment : none dead. 



No. 57. — June 21, 1894. Ten caterpillars, of the third 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 2 lbs. to 150 gal. of 

 water. One died the second, one the third, four the fifth, 

 two the sixth and two the seventh day. 



Check experiment : one died the seventh day. 



No. 58. — June 29, 1894. Ten caterpillars, of the fourth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 2 lbs. to 150 gal. of 

 water. Two died the second, five the third, one the fourth, 

 fifth and sixth days. 



Check experiment : one died the fourth and one the sixth 

 day. 



No. 59.— July 10, 1894. Ten caterpillars, of the fifth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 2 lbs. to 150 gal. 

 of water. One pupated the fifth day ; two died and four 

 pupated the sixth day ; one pupated the seventh day ; one 

 died the tenth and one the fourteenth day. 



Check experiment : four pupated and one died the fourth 

 day ; one pupated the fifth day, one the sixth, one the ninth 

 and one the eleventh day. 



No. 60 (field experiment). — July 7, 1894. Ten cater- 

 pillars, of the fifth molt, were placed on willow branches 

 which had been sprayed with Paris green, in the proportion 

 of 2 lbs. to 150 gal. of Avater. One pupated the fourth and 

 one died the thirteenth day ; three pupated the fourteenth 

 and one died the seventeenth day ; two pupated the nine- 

 teenth and two the twenty-sixth day. Foliage badly burned. 



