26 



This has been proved by numerous careful experiments made at several 

 of the experiment stations and by many progressive orchardists in vari- 

 ous parts of the country. 



The Pear. 



The pear-tree psylla can be kept under control by the use of kei'osene 

 properly applied, as has been shown by the experiments made by Dr. 

 Jabez Fisher of Fitchburg, and by the experiments made at the Cornell 

 University and the Massachusetts experiment stations. The wormy fruit 

 is prevented by the use of Paris green, and the leaf blight and ci'acking 

 of the fruit by the use of the Bordeaux mixture and copper sulphate 

 solution. 



The Plum. 



The fruit of the plum may be largely 

 saved from injury by the plum curculio 

 by the use of Paris green, and the in- 

 jury to the tree by the black-knot and the 

 leaf blight (Fig. 1 illustrates a plum 

 tree sprayed and Fig. 2 one of the same 

 variety unsprayed), and to the fruit by 

 the monilia or brown-rot may be pre- 

 vented by the use of the Bordeaux mix- 

 ture and the copper sulphate solution. 

 The large crops of plums that are borne 

 on the trees in the Hatch Experiment 

 Station orchards, some trees of which are 

 over thirty years old, is proof of this 

 assei - tion. The aphides that have been 

 so destructive to the plum in the past 

 two seasons can be destroyed by the use 

 of the kerosene emulsion or kerosene 

 and water. A pump for the use of kero- 

 sene and water is shown in Fig. 6. 

 The Japanese plum trees cannot be 

 sprayed with Paris green after the foli- 

 age has opened, and, if an arsenate is 

 necessary for the destruction of chewing 

 insects, arsenate of lead must be used. 



Fig. 6. 



The Peach. 



This fruit while not so much benefited by spraying as some of the 

 other fruits, may be sprayed with the Bordeaux mixture to prevent the 

 leaf curl, the shot-hole fungus and the rotting of the fruit. Paris green 

 cannot be used on the peach, but the arsenate of lead may be used for 

 the destruction of the plum curculio. The peach aphis, which causes the 

 leaves to curl up during the summer, may be destroyed by the use of 

 kerosene emulsion or kerosene and water. 



The Cheery. 



The cherry aphis, the minute black insect that causes the leaves to 

 curl and stops growth, can be kept from doing serious injury by the use 

 of the kerosene emulsion or kerosene and water, or by cutting off a few 

 leaves on the ends of the gi'owing branches. The rotting of the fruit 

 just as it begins to ripen may be prevented by spraying after every rain 

 for a week or two about the time the fruit is ripening with the copper 

 sulphate solution 4 ounces to 50 gallons. The cost of this work at first 

 would seem to be more than an ordinary crop would be worth, but the 



