PROGRESS REGARDING SUGAR-BEET WEBWORM. 



67 



and may cause some trouble by catching in fences, etc., when turn- 

 ing at the end of the field. Number 2 (fig. 18) is so arranged that 

 two nozzles are above each row of beets. This is desirable, but not 



60 



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X* 



a 





a 



V 



20 



eo' 



Fig. 17. — Four-row attachment for beet sprayer. (Original.) 



absolutely necessary, when large beets are to be sprayed. Number 3 

 (fig. 19) is so made that both the surface and the underside of the 

 beet leaves are reached by the spra}^. By using this attachment 



SO' 



A± 



t 



A 



-eo 



20- 



Fig. 18. — Four-row attachment for beet sprayer. (Original.) 



beets can be very thoroughly sprayed and young webworms on the 

 underside of the leaves will be more quickly killed than when only 

 the surface of the foliage is wet by the spray. A nozzle arrange- 



as' 



^^^V 



-20 



Wf 



? 



^~ 



Y 



Q 



H 



8_li(Bui| 



£>o 





r 



Fig. 19. — Four-row attachment for beet sprayer : Nozzles arranged so that both the upper 

 and lower sides of the leaves may be wet by the spray. (Original.) 



ment such as is obtained with this type is necessary when Bordeaux 

 mixture is applied for the leaf -spot disease (Cercospora heticola 

 Sacc). 



