Cooperative Spraying Experiments. 167 



the past season. The curcuHo was less numerous than usual in i\Ir. 

 Brown's orchard and there was practically no difference between the 

 sprayed and untreated trees, all bore good crops of fine quinces. In the 

 other experiment, part of the orchard was sprayed with arsenite of lime 

 and part with arsenate of lead, but no conclusions could be drawn, for a 

 " curculio catcher " or jarring machine was also used on all the trees. 

 Jarring is a very laborious process in this orchard as four men are re- 

 quired to run the machine, as shown in Fig. 42. 



While the results of these two seasons' experiments are far from con- 

 clusive, they should at least encourage New York quince growers to 

 thoroughly test a spray of arsenate of lead poison for this insect. It will 

 be a great boon to quince growers if they can discard the laborious jarring 

 process and control the pest with a poison spray. 



