INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



479 



The Bordeaux type (Pig. 480), is used largely in the applica- 

 tion of Bordeaux mixture and the arsenicals, but it is also used 

 for all kinds of work by many or- 

 chardists. The nozzle is easily 

 adjusted by the stop-cock and is 

 specially adapted for clogging sprays 

 or whitewash, for they can be cleaned 

 simply by turning the stop-cock once 

 around and blowing out the obstruc- Fig s .« Y .. 



tioil. '-The "U" shaped form is much better 



than one with a "V" shaped fork as 

 It has been demonstrated that an shown at the right, because the spray is 

 i i /t-t ir-o i \ • e forced straight ahead instead of side- 



angle nozzle (*lg. 4f8 b) IS tar Slipe- ways. Angle nozzles should be used on 



rinr to the straight form for most the straight " Y " and straight nozzles on 

 HOI to till Midlgllt lUim lOl most the angle "Y." (After Bean Spray Pump 



purposes, in that it admits of a much Company) 



greater variety of work, allowing the operator to spray at will in any 



direction by a slight turn of the wrist. 



For a power pump and two leads of hose, two angle nozzles on a 

 straight "Y" (Fig. 479) or two straight nozzles on an angle "Y" to 



Pig. 480. — Drawing, showing construction and exterior views of a Bordeaux nozzle. 

 Natural size. (Courtesy Prof. C. W. Woodworth, Cal. Agrcl. Exp. Sta.) 



each lead of hose, has given very satisfactory results where a great 

 spread of the spray is desired. 



THOROUGHNESS 



Great care should be taken to make the application thorough in 

 every respect. The material should not only be well agitated but 

 applied to every portion of the tree. Most of the unsatisfactoiy 

 results in spraying are due to inefficient and careless operators. Every 

 portion of the tree should be thoroughly drenched. The tips of the 

 side branches and the tops should receive the same careful considera- 

 tion as is usually given to the trunk. No one can hope for good results 

 who neglects this important phase of spraying work. 



