16 



Ky. Chemical and Cultural Control of Weeds in Agronomic Crops , 



(1) Develop practical and economical measures for control of 

 weeds of agronomic crops in state through use of chemical 

 herbicides, cultural techniques, and combinations of chemical 

 and cultural measures. (2) Study effect of chemical herbicides 

 on crop and weedy plants, and biological factors affecting weeds. 

 Agron. 16U 



Va. Chemical Weed Control in Corn and Alfalfa . Develop safe and 



economical chemical control of various types of weeds at different 

 stages of growth of alfalfa and corn. 

 Agron. 86073 



W. Va. Weed Control in Corn . (1) Learn and demonstrate effective 

 methods of weed control in corn under state conditions with em- 

 phasis on grass control. (2) Study chemical weed control as 

 related to type of herbicide, rate and time of application on 

 corn. (3) Study factors influencing germination and viability 

 of weed seeds so that plots under weed control may be seeded with 

 weeds with assurance of a stand, (k) Learn economic losses caused 

 by weeds and cost of weed control in corn. 

 Agron., Genetics 52 



Field Crops 



Ark. Physiological Effects of Selected Herbicides on Cotton, Soy- 

 beans, and Noxious Weeds . Establish maximal limits of certain 

 herbicides for cotton and soybeans, and minimal requirements for 

 control of noxious weeds, as may be influenced by age of plants 

 and i environmental conditions. Learn degree to which varieties 

 within a given species differ in their tolerance to any given 

 herbicide and learn cause of differences. Investigate mechanism 

 by which herbicides kill plants. 

 Agron. U08 (S-18) 



Calif. Weed Control Associated with Cotton Production . (1) Develop 

 a program of controlling annual and perennial weeds in cotton 

 fields and a control for similar weeds in nearby areas that act 

 as seed reservoirs. (2) Lower production costs, increase grades 

 of cotton, increase yields of cotton in some instances, reduce 

 maintenance costs along water ways, fence lines, etc., adjacent 

 to cotton land. 



Bot. 1568 Coop. USDA 



Del. Chemical Control of Weeds in Soybeans . Evaluate herbicides 

 for development of satisfactory and economical weed control 

 practices in soybeans with emphasis on pre-emergence applications. 

 Agron., Agr. Engin. 36A 



