1913.] PUBLIC DOCUMENT — No. 31. 89 



As a whole, the results were less satisfactory than in 1911. 

 AVhetlier tliis difference was duo to the diff"ercnce in the maker's 

 formula, to the rain following- within tw(^lve hours, or to the 

 greater dilution (in 1911 with the old formula it was 1 to 20 

 and 1 to 30), it is impossible to determine. jMany of the 

 scales were certainly killed, but enough were left so that the 

 trees were abont in their former condition at least three months 

 earlier than was the ease in 1911. It may be that the dilution 

 with the new fonnula material was greater than should have 

 been. the case; but the relative concentration of the two ma- 

 terials was, of course, known to the maker, who shonld ac- 

 cordingly have been able to advise the proper dilution for the 

 second formula to make it properly compare with the first, l^o 

 difference in results was noted with the two dilutions used. 



It may be said of this material that thus far it seems to have 

 some value as a scalecide, but that farther experimental work 

 by the inventor, followed by more field tests of the materials 

 thus produced, will be needed before any final formula can 

 be established. 



Nicine. — Manufactured by 'the Hood Chemical Company, 

 Chicago. This substance appears to be widely used as an ab- 

 sorbent, deodorant and germicide. It is also claimed that it 

 will prevent the hatching of the eggs of insects and will drive 

 away flies. It is " a success when blown on trees and shrubs 

 in destroying insects and fungus." 



A claim made in letters from the company, " that it limits 

 the activities of root parasites of all kinds," led to testing this 

 substance both for the protection of corn from wireworms and 

 of onions from the onion maggot. For the corn two plots about 

 a thousand feet apart were taken, and in each, rows were treated 

 in twos, alternating with two untreated, used as checks. The 

 rows were about three feet apart. The Nicine w^as poured into 

 the drills in fairly large amounts, was then covered slightly and 

 the corn planted over it. 



It w^as anticipated that the plots would be quite badly in- 

 fested with wireworms, but unfortunately for the success of the 

 test these proved to be rather scarce, and on this account the 

 experiment can hardly be considered a success. The only con- 

 clusions which could safelv be drawn from the work were the 



