162 Bulletin 235. 



W. A. Bassett, Interlaken, on plums. 

 G. Schoenfeld, Westfield, on plums. 



The beetles appeared in full force on peaches at E. Smith & Sons, Lodi, and it 

 was thought necessary to use the jarring machines on all the trees, thus rendering it 

 impossible to draw any definite conclusions from the spraying. 



George H. Bostwick, Ripley, sprayed cherries three times with the poison on 

 May 2d, May 14th, and June 2nd. He reported that " the curculios were very scarce, 

 but I am well satisfied we did not have as many wormy cherries, as did our neigh- 

 bors who did not use a poison spray." J. W. Spencer, Westfield, again used the 

 poison spray on peaches, plums and cherries with results similar to those he obtained 

 in 1903, as detailed on page 159. 



Owing to the adverse conditions detailed above, the results from the 

 cooperative experiments with a poison spray against the plum curculio 

 in 1904, were far from conclusive but were sufficiently encouraging, es- 

 pecially on cherries, to warrant further experiments the next season. 



In 1905, I sent 20 pounds of arsenate of lead to each of the fol- 

 lowing fruit-growers who desired to cooperate in spraying experiments 

 against the plum curculio : 



Freeman Pintler, Ontario. 



Albert Wood, Carlton Station. 



Geo. H. Bostwick, Ripley. 



Ira Pease, Oswego. 



I recommended that the poison be used at the rate of 2^4 pounds in 

 50 gallons, and that on part of the trees at least, three applications be 

 made, once just before blooming, again just after the blossoms fell, and 

 finally about a week later. 



Mr. Pintler sprayed peaches on June sth, 9th, and 15th, and in spite of several 

 heavy rains during the spraying season, he reports that " it is very difficult to make 

 a comparison, for the damage done by the curculios is very light. There were 

 almost no peaches stung on the sprayed trees, while there were some on the un- 

 sprayed." 



Mr. Wood sprayed one row of plums with the arsenate of lead three times as 

 directed, using the Bordeaux mixture each time. An adjoining row was sprayed 

 at the same time with Paris green at the rate of i pound in 50 gallons of Bordeaux, 

 and a fourth application of whale oil soap was made after the other three with the 

 poison. Two check trees were left unsprayed. Both sprayed rows bore a large crop 

 of fine fruit. The check trees lost most of their foliage from the leaf blight fungus 

 and they had much fewer fruits on them. Note how the branches on the sprayed 

 tree in Fig. 40 are bending down with their load of fruit, and compare it with the 

 unspraj^ed tree in Fig. 41. Thus Mr. Wood's results were quite striking and he is 

 convinced that he can control the plum curculio with a poison spray. 



Mr. Bassett reports curculio not numerous, and there was but little difference 

 in favor of the sprayed trees. However, he has obtained sufficient results from his 



