-4- 



forms because of its very short residual effect. Both Trithion and Diazinon 

 are longer lasting. 



BHC (benzene hexachloride) may be substituted for lead arsentate in one 

 or more of the sprays suggested for apple tree borer and should give control 

 of green aphid as well as borer. 



Leafhoppers should be controlled by any of the materials mentioned except 

 lead arsenate. 



Buffalo Treehopper ; This insect damages young apple trees by slitting 

 the bark of twigs and smaller branches to lay eggs. This occurs in August and 

 the eggs hatch the following April and early May. The nymphs fall to the ground 

 and feed on the cover crop until they become adults beginning about mid-July. 

 Alfalfa, sweet clover and bindweed are favorite food plants. 



Keeping the young orchard free of suitable host plants and weeds is often 

 practicable and in some situations an effective control for this insect. 



Where necessary, sprays or dusts of DDT or BHC may be applied to the ground 

 cover and trees sometime in late July or as the adults appear in the trees. 

 (If the cover crop is to be used as feed for cattle, substitute methoxychlor 

 for DDT or BHC) . About 4 pounds of a 50% wettable powder DDT (4 pounds of a 

 10-12% gamma BHC) should be applied per acre. 



— E, H. Wheeler 



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



STAND-BY GENERATORS FOR THE FARM 



Electric power suppliers do an excellent job of providing dependable power 

 and satisfactory service. Power failures are very infrequent and usually for 

 very brief periods. But no electric power supplier can guarantee continuous 

 service. Should farms which are highly dependent upon electric power have stand- 

 by units? The answer depends upon the nature of the operation, the electrical 

 equipment involved, the loss a power failure might cause and the dependability 

 of the power supply. 



For some operations a stand-by generator may be justified and provide needed 

 protection. 



Type . Small electric generators can be driven either by a direct-connected 

 engine or by your tractor. Each type has both advantages and disadvantages. The 

 engine-driven unite are easier to locate: you can put them in a corner of the 

 basement, the garage, or any building near the main service entrance. Tractor- 

 driven units must be placed where they can be belted to the tractor. It is best 

 to operate the tractor inside. If it is to be operated outside, a rubber belt 

 is essential. Voltage and speed of the tractor- driven unit must be controlled by 

 the speed of the tractor. 



One disadvantage of the engine-driven unit is the upkeep and servicing 

 that are required to keep it in operating condition. The farm tractor is ready 

 to operate at all times, and it can therefore be used with little added trouble 



