210 



VAN Slyke (L. L.). Composition of some of the Insecticides and 



Fmigicides used in this State.— Proc. 66th [3rd] Ann. Meeting 



N.Y. State Hortic. Soc, Rochester, N.Y., 1921, pp. 12-16. 



[Received 23rd February 1922.] 



From an examination of nearly 200 samples of insecticides and 



fungicides in New York State it would seem that the chief materials 



used during 1920 were very generally up to the guarantee given by 



the manufacturers. 



The materials tested were Paris green, arsenates, Bordeaux mixture, 

 Bordeaux and lead arsenate mixtures, Bordeaux and Paris green 

 mixtures, lime-sulphur solution, dry hme-sulphur preparations, nicotine 

 preparations, soap and hellebore, anah^ses of which are given. 



Parrott (P. J.). The Seasons Experience with Insects and Insecti- 

 cides. — Proc. 66th [3rd] Ann. Meeting N. Y. State Hortic. Soc, 

 Rochester, N.Y., 1921, pp. 17-37. [Received 23rd February 

 1922.] 



The more important insect enemies of apples during 1920 were 

 three species of small leafhoppers, the injury by which is described. 

 One of these is also a serious pest of roses. Should these insects 

 continue to be numerous, it is suggested that nicotine sulphate be 

 used against them. The nymphs, especially in the earlier stages, are 

 very susceptible to nicotine, but special care should always be taken 

 to coat the lower surfaces of the leaves. 



The San Jose scale [Aspidiotus perniciosus, Comst.] has been of 

 little importance during recent j^ears in commercial orchards in Western 

 New York, but should an increase of this past be noticed, lime-sulphur 

 at the rate of 1 to 8 should be applied, especially in orchards of large 

 trees. 



The pear thrips [Taeniothrips inconsequens, Uzel] is very destructive 

 in orchards in the Hudson Valley, causing large losses in yield and 

 reducing the vitality of the trees by injury to the foUage. Timely 

 and thorough spraying with miscible oil and nicotine sulphate is the 

 most promising remedial measure. 



Calcium arsenate has proved as effective as lead arsenate for the 

 control of codling moth [Cydia pomonella, L.], and although severe 

 scorching occurred in several instances, this was generally avoided by 

 adding an extra amount of lime. Hitherto calcium arsenate has been 

 chiefly used against the cotton boll weevil [Anthonomus grandis, Boh.], 

 for which purpose about ten million pounds were allotted to the Southern 

 States during 1920. Aphis sorbi, Kalt. (rosy aphis) occurred in great 

 abundance during 1920. AppUcations of lime-sulphur and nicotine 

 sulphate afford a certain amount of protection, and the difficulty of 

 reaching all the insects maybe partly overcome by timely application 

 and thorough distribution of the spraying materials. 



Information with regard to toxic gases for the peach borer [Aegeria 

 exitiosa, Say] and the control of sucking insects by dust mixtures has 

 already been noticed [R. A.E., A, ix, 325, 352]. 



Strickland (L. F.). The Pear Psylla Problem.— Proc. 66th [3rd] 



Ann. Meeting N.Y. State Hortic. Soc, Rochester, N.Y., 1921, 



pp. 48-49. [Received 23rd February 1922.] 



The pear psylla [Psylla pyricola, Forst.] has been rapidly increasing 



during the past three years in New York. The factors influencing 



the severe infestation in 1920 were the ph\^sical condition of the trees, 



