New YorkK AGRICULTURAL EXPERIMENT STATION. 341 
water to 40 gallons. This wash sprays fairly well but is some- 
what troublesome in clogging the machinery, especially the noz- 
zies, unless kept warm. It forms a smooth glossy coat on the 
bark. 
Results.-—Although the trees were examined several times dur- 
ing the season, there was no evidence of injury. A fair per- 
centage of the scales were killed, but so many survived the 
treatment that before cold weather the trees had become quite 
badly infested again. The wash did not remain more than two 
or three weeks on the trees. 
Station formula.— This wash is the result of a number of 
attempts to make a resin wash without boiling. In this case 
the ammonia dissolves the resin. It is only necessary to stir 
the mixture about 15 minutes or until all of the resin is dis- 
solved. The principal objection to this wash is the fact that 
it gums the machinery somewhat, especially if allowed to stand 
for a day or two in the tank. It is much beter to empty the tank 
and clean the machinery by pumping through a little diluted 
ammonia or boiling hot water before putting the machine away. 
The wash was tested at two strengths, the stronger containing 
one-half pound of resin to each gallon of the mixture, and the 
weaker one-fifth pound to the gallon. The formula is as follows: 
SE APENIVOTITE DO sos 02. be Wie cre She ele aoele be 14 gallons. 
ESD CGN SSMS Ba ai aS ya A A RE 1 quart. 
PEC TE  Oy ats SheR NG CeO N oan Pas SE LOY s 8 pounds. 
MEE 1S Ws Bh A ne be arm oa Le 4 gallons. 
As soon as the resin is thoroughly dissolved add water to make 
16 gallons of the mixture for the strong and to make 40 gallons 
for the weak. 
Six peach trees were sprayed with the weak and six with the 
strong mixture. One tree in each lot was badly encrusted with 
the scale and the others: were moderately infested. 
Results.--The wash sprayed well, as it formed a soapy mixture. 
It dried quickly on the trees, leaving a smooth polished surface. 
No injury was caused in either case and the scales were evi- 
dently killed wherever the wash came in contact with them, 
as only an occasional live scale was found. 
