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Blueberr ies 



Diuron has been cleared for use as a weed killer in blueberries at the rate 

 of 2 pounds per acre. It is most effective xvhen applied to a weed-free soil in 

 early spring. In no case should it be applied within 60 days of harvest. Diuron 

 is quite effective against most annual broadleaf weeds and grasses but is much 

 less effective against the deep-rooted perennials. 



Chloro-IPC has also been cleared for use around cultivated blueberries up to 

 a total of 12 pounds per acre applied during the dormant season. Since this is 

 essentially a grass and chiclcweed killer and can be used only during the dormant 

 season, its effectiveness is limited, 



2,4-D up to 3 pounds per acre has also been cleared for use on cultivated 

 blueberries but care should be exercised not to get it on the leaves of the 

 plants. Since its use is limited to fall application and it is effective only 

 against broadleaf weeds, its use in blueberries is also limited. 



Raspberries 



Only two materials have been cleared for weed control in raspberries in the 

 Northeast. 2,4-D can be used to control broadleaf weeds since mature canes are 

 quite resistant to it. However, care should be exercised to use a directed spray 

 and not to use it at a time when the gro\;ing tips of the new canes v;ill be sprayed. 

 It may be applied at the rate of 1 pound actual acid equivalent per acre. 



Chloro-IPC, as with strawberries and blueberries, can be used as a dormant 

 application up to a total of 8 pounds per acre. 



Grapes 



Simazine 80-W lias been cleared for use on grapevines at least 3 years old. 

 It should be applied before the weeds emerge in the spring at rates from 2 to 6 

 pounds per acre. 



Dalapon may be used for grass control up to 14.8 pounds per acre. The spray 

 should be so directed that it does not hit the vines. 



Diuron, as previously stated, is most effective when applied in the spring 

 before weeds germinate. It can also be applied in the fall for the control of 

 fall and winter vjeeds. The total amount applied should not exceed 4.8 pounds per 

 acre. If the application is split, half may be applied in the spring and half in 

 the fall. 



The herbicidal formulas of dinitro may also be used on grapes up to a total 

 of 1.9 pounds per acre active ingredients. These are most useful where most of 

 the weeds are annuals. 



Amino triazole may be used as a dormant application at rates not to exceed 2 

 pounds per acre on vines 3 years old or older. 



V;henever using herbicides, read th e label carefully until you thoroughly 

 understand its directions. Then foll oi'; them e:c actly. 



John S. Bailey 



