i8 
fHE CODLING MOTH. 
bellows duster,-that is excellent for applying vege¬ 
table powders as pyrethrum or hellebore upon 
plants or for the destruction of flies in-doors. 
If local dealers do not handle the above men¬ 
tioned articles, they may be procured directly from 
the manufacturers. 
THE GRAPE-VINE LEAF-HOPPER. 
Typhlocyba vitis , Harr. 
The Grape-vine Leaf-hopper, often spoken of 
by vineyardists as the “Thrip,” seems to be a very 
serious enemy to grape-vines in Colorado. 
Fhe following extract from a letter recently re¬ 
ceived from Mr. W. B. Felton, President of the 
State Bureau of Horticulture, will be of interest in 
this connection: 
Canon City, Colo., March 18th, 1891. 
“Prof. C. P. Gillette, 
Dear Sir:- -Am glad to know that your are going to investigate 
the Leaf-hopper. It is the great pest of the grape grower here and 
also on Wheat Ridge and in other parts of the State. It will be a 
great blessing to have a bulletin from you giving a reliable and 
thorough method of extermination. 
The hoppers that we have do not touch the buds. They appear 
at the base of the vine in the spring and as the foliage comes out go 
up and attack the under side of the leaves and breed there. They 
suck the substance from the leaves and about the time that the 
gtapes would commence ripening the leaves are only skeletons, and 
the maturing of the grape ceases. 
They attack by preference foreign varieties, Delaware and other 
tender-leaved vines, but when the more toothsome varieties are defol¬ 
iated, they will attack Concord and other tender-leaved vines. 
After a considerable experimenting I found that an emulsion of 
one gallon ©f kerosene, one pound of soap and fifteen gallons of water 
would kill the hoppers and not hurt the foliage I used this emulsion 
through the season and the hoppers did not get the better of me, but 
the emulsion took the bloom off the grapes and left a sta’in that in¬ 
jured their appearance for the market. Yours truly, 
W. B. Felton.” 
