10 



WEED CONTROL 

 Horticultural Crops 



Weed Control of Horticultural Crops. To determine which 

 chemicals and cultural practices or combination thereof are best 

 suited to the control of weeds and their influence on produc- 

 tivity, winter survival, and quality of such crops as lettuce, 

 cabbage, beets, and strawberries. 



Hort. 9 



Effect of Mulching on Survival, Productivity, and Weed Control 

 Practices of Strawberries . To determine (1) effect of mulching 

 and weed control practices on overwintering and productivity of 

 strawberries; (2) if good commercial varieties can be grown success- 

 fully when cultured in a manner similar to that used by commercial 

 Stateside growers; and (3) to provide a means of developing straw- 

 berry industry with existing varieties until such time as a better 

 variety is released from the hybridizing program. 



Hort. 11 



Control of Weeds in Lettuce and Cantaloupes . To (1) screen 

 and evaluate existing herbicides as well as those which may be 

 developed during the time the project is in progress; and (2) 

 make detailed evaluation of herbicides found to be effective as 

 to rate of application, time of application in relation to crop 

 seeding and growth, concentration, and method of application. 



Hort. 37U Coop. ARS 



Control of Weeds in Horticultural Crops with Emphasis on 

 Herbicides Applied Prior to Weed Emergence . (1) Screen new chemicals 

 as possible pre-emergence herbicides. (2) Evaluate herbicide-soil 

 incorporation and irrigation prior to and following herbicide applica- 

 tion as means of making pre-emergence weed control more effective. 

 (3) Learn deleterious affect of repeated application of chlorophenyl 

 dimethylurea on asparagus field over a number of years. 



Hort. 11-H 



Control of Weeds in Nursery by Chemical Sprays . Find chemicals 

 or combinations of chemicals that will control weeds without injury 

 to ornamental plants. 



Landsc. Arch. 8U 



Weed Control in Vegetable Crops . To develop more efficient 

 methods for the control of weeds in vegetable crops through the 

 use of various herbicides and/or mechanical means. 



Hort. 87 



Weed Control in Cranberries . To discover best means for con- 

 trolling or eradicating weeds among cranberry vines. 

 Cranberry 116 



