18 



Va. Weed Control in Field Crops . Develop principles and practices 

 for effective and efficient chemical weed control in peanuts, soy- 

 beans, small grain, forage seedling establishment and maintenance, 

 cotton, tobacco seed beds, and field grown tobacco. 

 PI. Path., Physiol. 86067 



Wyo. Use of Herbicides for Control of Weeds in Sugar Beets . (2) 



Learn effect of chemicals upon yield and composition of beets. (3) 

 Devise and develop a band method for field application of herbicides. 

 Agron. 608 



Lawns and Turf 



Ohio Weed Control in Turf . To grow turf free of weeds by the use 

 of chemicals and/ or good maintenance practices. 

 Agron., Ent. 71-6 (NC-10) 



Ponds and Ditches 



Ala. Chemical Control of Weeds in Ponds . To test (1) effectiveness 

 of commercial and experimental herbicides and algacides on common 

 pond weeds; (2) toxicity of herbicides and algacides to fish and 

 fish food organisms, and their effects on fish production, plankton 

 and bottom organism production; (3) effects of herbicides or 

 algacides on flavor of fish. 

 Ent., Zool. U27 



Ariz. The Control of Weeds on Irrigated Lands . To determine the 



most effective and economic methods of weed control on the irrigated 

 lands of Arizona. 



Agron. and Range Mgt. 26l Coop. ARS 



N. Mex. Chemical Weed Control on Cropland, Irrigation Systems, and 



Water Courses . To (1) determine germination requirements and lonn 

 gevity of weed seeds under New Mexico conditions; (2) utilize in- 

 formation gained under objective (1) to determine the influence 

 of temperature, moisture, and soil conditions on the action of 

 herbicides on germinating seedlings; (3) further these, evaluate 

 environmental variables as they affect the action of herbicides 

 on emerged seedlings; (U) relate differences in enzyme systems and 

 other plant constituents to the selective action of herbicides on 

 resistant and tolerant strains of perennial weeds of the same 

 species; (f>) utilize knowledge of crop and weed ecology to pre- 

 disposed infesting weeds to the selective action of herbicides; 

 (6) determine the toxicity of growth regulator herbicides to salt 

 cedar, and the variables affecting their action; and (7) evaluate 

 in screening tests the effects of new herbicides on the growth and 

 quality of field and horticultural crops and on the weeds common 

 to these crops. 

 Agron. U6 



