Utah Effect of Environmental Factors on the Susceptibility of 



Creeping Perennial Weeds to Herbicides^ (1) Learn susceptibility 

 of creeping perennial weeds to herbicides as influenced by soil 

 moisture, soil fertility, soluble salts, cultivation before and 

 after herbicide treatments, etc. (2) Increase efficiency of 

 herbicides. 



Agron. U98 (W-ll) 



Va. The Effect of Herbicides on Crop Plants and Weeds . To 



determine (1) effects of herbicides on food value, texture, 

 flavor, enzymes, vitamins, and other quality measures of crop 

 plants and (2) mode of entry and processes involved in killing 

 action of herbicides on weeds and crops. 

 PI. Path., Physiol. 93903 (S-18) 



Wash, Perennial Weed Control . To (l) Learn physiological charac- 

 teristics and ecological relations of creeping perennial weeds as 

 related to herbicidal effectiveness; (2) learn factors affecting 

 entrance and translocation of certain herbicides, and learn physi- 

 ologic changes induced in plants; (3) relate results of physiolog- 

 ical studies to methods of control and make control trials; (It) 

 test new chemicals which show promise for use in controlling weeds. 

 Agron. 1120 



Wash. Effect of Herbicides on Root Morphogenesis with Special 

 Reference to Meristems and Vascular Tissues . Learn effect of 

 herbicides on morphogenesis of roots in relation to herbicidal 

 effectiveness; note changes occurring in meristems and vascular 

 tissues. 



Agron. 1372 (W-ll) 



W. Va. Factors Affecting the Herbicidal Activity of Some Chemicals 

 Applied to the Soil Surface . To study (1) fundamental relations 

 between soil characteristics on the effectiveness of various her- 

 bicides as measured by germination and seedling vigor in the green- 

 house; (2) effective rate of application of herbicide under con- 

 trolled conditions of moisture and pH; (3) influence of above soil 

 characteristics as thev affect herbicidal activity of 2,U-D, 

 dinitro's, etc.; and (U) persistence of herbicidal activity under 

 controlled soil moisture conditions. 

 Agron., Genetics 76 (NE-12) 



Wis. Control of Vegetative Bud Activity in Weedy Plants . To de- 

 tennine more exactly the mechanisms regulating vegetative bud 

 activity in weedy plants and develop methods for controlling weeds 

 by this means. 



Agron. 56 (NC-10) 



