Some growers have obtained good control of established grass and weeds 

 vrith granular simazine applied in May. It is the writer's opinion that the 

 granular simazine was applied under the non-bearing apple trees at a rate in 

 exfcess to that recommended. In trials conducted in 1962, granular simazine 

 applied at the rate of 75 pounds per treated acre failed to control grass. 



Trials have been established using granular simazine under apple trees on 

 October 15, November 1 and as soon as the snow leaves the ground. 



V. DIURON (KARMEX) 



Diuron at the rate of four pounds per acre gave varying degrees of orchard 

 weed control in several trials conducted in 1962. The treatments were applied 

 during May and June under trees having xtoII -established grasses. This liming 

 was used because many orchardists apply herbicides in May and June. 



Diuron 'ill not give satisfactory control of deep-rooted grasses or well- 

 established annual weeds consistently. These weeds should be removed prior 

 to treatment. Since most of our apple orchards are in sod, the best use of 

 diuron is in combination with dalapon. Dalapon controls grasses bvit has no 

 practical effect on other weeds. T'le combination will control grass and 

 eliminate or dwarf many weeds which are likely to take over where the grass 

 has been subdued. Diuron stunts but does not eliminate all sorrel, vetch, 

 dandelions and other weeds. 



Trials have been established using diuron under apple trees on October 15, 

 November 1 and as soon as the snow leaves the ground. 



William J. Lord 



I I I I I I I I I I I I I I I I 



Peach Tree Borer Control on Young Peach Trees 



Successful control of peach tree borers by a preplanting treatment was re- 

 ported in an article published in the June 1962 issue of the Journal of Economic 

 Entomology , by E. H. Smith of the New York State Agricultural Experiment Station 

 at Geneva. Since control measures are often omitted on young trees until they 

 come into bearing, this simple method of treatment before planting should be of 

 great value, especially, if new trees are planted among older ones which can 

 serve as a source of infestation. 



The treatment consists of dipping tho, roots and the basal portion of the 

 trunk in a v;ater suspension of 5 to 10 pounds of 50?/, endosulfan (Thiodan) 

 v/ettable pov/der per 100 gallons. V.'ettable powder formulations r'^quire constant 

 agitation. Although the results reported were based on dipping individual trees, 

 presumably bundles of 10 to 25 trees could be dipped at one time. After treat- 

 ment the trees were air dried before planting. 



