-12- 



A systemic insecticide such as demeton should give complete control of aphids, 

 leafhoppers and mites and not be particularly daniaging to the predator population, 

 Demeton could be applied somev/hat later June or even in early July, after the leaves 

 had become somewhat curled. To obtain a high degree of control vrLth the other 

 materials or vrith malathion and TEPP, it would be necessary to make the applications 

 before serious leaf curling had occurred and they certainly would have to be repeat- 

 ed two or three times on som-e varieties or when conditions were favorable to the 

 aphids* 



Demeton is extremely toxic like parathion and. TEPP , It should be handled v/ith 

 all due respect. Follow all safety precautions listed on labels for any of these 

 materials. Directions for diluting the materials are always found on labels and 

 are reliable. 



The buffalo treehopper causes damage to the trunks and branches of young trees 

 through its egg laying activity, Deep slits are made in the tender bark and vfhere 

 they are numerous, the affected parts are heavily scarred, may be stunsted or even 

 killed. 



Upon hatching in May or June, the nymphs of the treehopper move to succulent 

 plant groiTth such as weeds, various legumes like alfalfa, sweet clover, and a few 

 others. You can readily see that clean cultivation of young orchards would be an 

 effective control measure for the buffalo treehopperc 



DDT is very effective against both nymphs and adults of this treehopper. Some 

 of the materials used as aphicides, such as BK), lindane, malathion and perhaps 

 demeton, also should be effective against them, but might not give as long-lasting 

 residual effect as does the DDT« 



Regardless of the material used, the best time to make the application is 

 about mid-July or as soan as any adult treehoppers are discovered. 



The treatment should be made to all the vegetsta-on in the orchard and for a 

 distance of about 100' around the orchard if good control under conditions of 

 severe infestation are to be expected. 



Once again, let me remind youj you have an investment, why not protect it? 



E, H, ViTheeler 



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SPECIAL CIRCULAR RECENTLY REVISED 



The following circular has been revised and is available to anyone wishing 

 a copy. 



Special Circular #21^ "Controlling Weeds in Strawberries With Chemicals" 



Address requests to either the Department of Pomology or the I'iailing Room, 

 University of Llassachusetts, Amherst, Massachusetts, 



Editor 



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