818 PoruLAR Editions of Station' Bulleti-ns ok the 



them effectively with any sprayer fitted with fixed nozzles. Hand 

 management of the nozzles, with free hose, gave better results, 

 but is a more expensive method, and, with nicotine, exceedingly 

 unpleasant, drenching of the clothes by the wind causing nausea 

 and illness in many cases. 



The method of applying then, rather than the material to be 

 used, appeared most needful of study ; therefore the efforts of the 

 Station entomologist in the Chautauqua field were directed toward 

 the development of an attachment for power spray outfits that 

 would put the material where needed without personal discomfort. 

 A device of this kind had been made in 1911 by Mr. F. A. 

 Morehouse, of Eipley ; but was not a success because of certain 

 defects. After considerable study this attachment was so modi- 

 fied that it gave most excellent results in actual field work. 



This attachment consists of an iron pipe frame- 

 Automatic work attached rigidly to the side of the spray cart, 

 spraying which carries three movable booms at different 

 attachment, heights, each swung out under the vines by a 

 coiled-wire spring and fitted with hose-and-pipe 

 connection leading to an adjustable nozzle at the end. The 

 springs are made strong enough to hold the nozzles in position 

 under or among the leaves against ordinary resistance but allow 

 the booms to swing past fixed obstructions. The nozzles are pro- 

 tected against entanglement with vines or foliage by inclined 

 guards. The range in height given by the three booms, with a 

 difference in their length, and the change in direction of the spray 

 allowed by the adjustable nozzles make it possible to cover thor- 

 oughly all parts of the vines. 



No attempt is made here to give details of this attachment; but 

 a full description of it is given in the regular bulletin, with plans 

 and illustrations. It can be constructed by any blacksmith or 

 plumber for less than $20. 



Spraying should be done when the nymphs (young 



Directions "hoppers") have reached their maximum num- 



for bers, which, in Chautauqua county, will be some 



spraying. time in July, the exact period varying somewhat 



with the season. 



