226 Maine Agricultural Experiment Station. 1917. 



TABLE 24. 



Chemicals on or in Soil and Their Effect on Pupae and Adults 

 Upon Emerging. 



Square feet 

 of soil 

 treated 



2 

 2 

 2 

 2 

 2 



1 V2 



1 V2 



1 V2 



1 V2 



1 V2 



1 y2 



1 V2 



2 



1 1/2 



Number of| Dates of 

 pup aria ! appliea- 

 buried tion 



50 



May 11 



25 

 25 

 25 

 50 



50 

 50 



11 

 11 



n 



12 

 13 

 12,22 



25 



11,22 



25 



12,22 



25 



12,22 



25 



13,22 



50 



13,22 



50 



12,22 



25 



12,22 



50 



11, 22 



50 



12, 22 



25 



1] 



Treatment 



1 lb. sulphate of iron mixed with 24 

 lb. of sand on soil 5 



5 lb. unslaked lime stirred in soil 5 



15 lb. unslaked lime on soil 1 



13 lb. lime s'aked on soil 2 



Vi lb. potassium cyanide in soil o 



4 tablespoons carbon bisulphide In sofl 16 



2 gal. 1 pt. formaldehyde to 30 gal. 

 water 



1 % gal. 2 pt. formaldehyde to 50 gal. 



water 

 1 V2 gal. 1 part Nikoteen to 100 parts 



water 2 



1 V2 gal. 1 part Nikoteen to 400 parts 



of water 2 



1 1/2 gal. 1 part Black Leaf 40 to 600 



parts water 



1 % gal. 1 part Black Leaf 40 to 800 



parts water 

 1 % gal. 1 part stock solution kerosene 



emulsion to 12 parts water \ 



1 % gal. 1 part stock solution kerosene 

 emulsion to 20 parts water J 1 



2 gal. 1 part stock solution carbolic 



acid emulsion to 35 parts water \ 1 



2 gal. 1 part stock solution carbolic 

 acid emulsi-n to 50 parts water 



None (check) : 12 



Number ot 



adults 



emerged 



In view of the fact that no adults emerged from 50 puparia 

 buried with potassium cyanide as indicated in table 24, a num- 

 ber of experiments were now conducted to determine the effect 

 of potassium cyanide on wild gooseberry bushes growing in 

 sod and on cultivated currant bushes. Different quantities of 

 this poison were buried in holes three inches deep at various 

 distances from the origin of the branches above the soil as indi- 

 cated in table 25. Several weeks after the treatment, all of the 

 wild gooseberry and cultivated currant bushes had shed their 

 leaves, but the next spring all of the shrubs "leafed out" again. 



