New York Agricultxjkal Experiment Station. 



2G1 



ORCHARD IV : PEACH, PEAR AND APPLE TREES. 



This small orcbard consists of ten peach, pear and apple trees 

 just coming into bearing. The orchard has evidently received 

 fairl}^ good care, and until two or three years ago the trees were 

 thrifty. Recently most of them have shown signs of weakness, 

 probably due in part to the San Jos6 scale. 



The treatment and results are summarized in Table X. 



Time of tests in Table X. — Winter treatment. Trees sprayed 

 Dec. 20 to 24. 



Table X. — Winter Spraying in Orchard IV. 



Trees. Strength 



, • , of 



Number petro- 



Kiiid. treated. Degree of iufeatation. leum. Resalts. 



Per ct. 



Peach: 



Var. unknown. 2 Slightly infested 25 Scales not affocfed. 



Trees slightly in- 

 jured. 



Yar. unknown. 1 Slightly infested 40 Scales dead. Tree 



seriously injured. 

 Pear: 



Var. unknown, 2 Slightly infested 40 Scales dead. Tree 



uninjured. 

 Apple: 



Var. unknown. 6 Extensively infested.. 40 Scales dead, 2 trees 



seriously injured, 

 remainder unin- 

 jured. 



SUMMARY FOR ORCHARD IV. 



In these experiments also, the 25 per ct. emulsion did not 

 Idll the scales while the 40 per ct. was effectual. The peach 

 trees, although no more seriously infested than the pears, were 

 slightly injured by the 25 per ct., and seriously injured by the 

 40 per ct. emulsion. Two of the apple trees were injured by 

 the 40 per ct. emulsion but not seriously. 



ORCHARD V: PLUM TREES. 



This orchard consists of twenty plum trees which have 

 recently come into full bearing. All of them are extensively 

 infested and somewhat weakened by the San Jos^ scale. As 

 shown in the following table half were sprayed in the spring 



