21 



Miscellaneous Crops and Weeds 



Control of Noxious Perennial Weeds by Chemical and Cultural 

 Methods . (1) Screen chemicals for the control of nutgrass, 

 Johnson grass, and wild onions under greenhouse conditions. (2) 

 Test chemicals under field conditions both when used alone and in 

 combination with tillage operations. 



Agron. 33 



Control of Weeds in Economic Crops . To (1) improve methods 

 of controlling weeds by developing herbicides for use alone and 

 in conjunction with other cultural practices and to adapt these 

 methods to crop production techniques; (2) search for and test 

 improved selective and general^ herbicides; (3) learn influence of 

 environmental conditions on selective action of herbicides on 

 major crops and weeds; (h) evaluate response of major crop 

 varieties and breeding stocks to established herbicides such as 

 2,li-D; (5) learn most effective method of using more promising 

 herbicides, i.e. time of application, preferred concentration and 

 dosage, and site of application; (6) secure fundamental engineer- 

 ing information leading to development and improvement of equip- 

 ment and methods for controlling weeds; and (7) study development 

 of crops and weeds as influenced by the several factors of en- 

 vironment, weed control practices, and crop production methods. 



Agron., Agr. Engin., Bot., Hort., PI. Path. 1121(NC-10) Coop.USDA 



Weed Control in Maine Crops . To devise more effective chemical 

 weed control practices in Maine crops. 

 Agron. lii 



The Use of Herbicides for the Control and Eradication of Leafy 

 Spurge""and Poisonous Weeds . To develop more effective methods of 

 controlling leafy spurge ( Euphorbia esula ) in cultivated and non- 

 cultivated land, and study methods of controlling poisonous plants 

 with herbicides. 



Agron. 151, M.S. 952 



Eradication and Control of Weeds . To (1) establish principles 

 and develop methods to eradicate or economically control annual, 

 biennial, and perennial weeds on fields, pastures, roadsides, irriga- 

 tion ditches and lawns; (2) investigate new and old herbicides to 

 supplement present knowledge of cultural and chemical weed control 

 methods; (3) determine effects of weed control measures on yield, 

 quality, and germination of crops produced; (U) compare cultural and 

 other weed control practices alone, chemical treatments alone, and 

 combinations of these methods; and (5) study influence of environ- 

 mental factors on results obtained from weed control measures. 



Agron. 216 (NC-10) 



