Calif. Penetration of Herbicides . To (1) learn how to increase 

 penetration of herbicides and thus enhance the possibility of 

 greater effectiveness in their use; and (2) study intimate 

 mechanisms involved in passage of such chemical across plant 

 membranes. 



Bot. 1583 (W-ll) Coop. USDA 



Colo. Studies on Physiological Factors Related to Weed Control. 

 To (1) learn relationships of physiological activities to herb- 

 icidal reaction; and (2) relate these studies toward devising or 

 improving means of controlling or eradicating weeds with maximum 

 efficiency and minimum injury to associated plants, soils, animals, 

 and man. 



Bot. & PI. Path. 21ix (W-ll) 



Storrs The Influence of Soil Factors on the Herbicidal Effective- 

 (Conn.) ness of_ Certain Carbamates . To determine the influence of soil 

 moisture, texture, organic matter content and pH upon herbicidal 

 activity of these carbamates: isopropyl N-(3-chloro-6-methoxy- 

 phenyl) carbamate, sec. 'butyl N-phenyl carbamate; isopropyl N- 

 (3-chloro-6-methoxyphenol) carbamate, isopropyl N-(3-methyl- 

 phenyl) carbamate, isopropyl N-3, 6-dichlorophenyl) carbamate, 

 and isopropyl N-(3-chloro-phenyl) carbamate, 

 PI. Sci. 221 (NE-12) 



Del. Persistence and Penetration of CHU in Asparagus Soils . To 

 determine degree of persistence and penetration of CMU (3-para- 

 chlorophenyl-1, 1-dimethylurea) in asparagus soils particularly 

 as affected by irrigation and soil organic matter. 

 Hort. 55-H (NE-12) 



Fla. The Effects of Simulated Rainfall on the Herbicidal Activity 

 of DNBP and 2,U-DES . Learn effects of rates and frequencies of 

 simulated rainfall under different conditions on the herbicidal 

 activity of DNBP and 2,U-DES. 

 Agron. 839 (S-18) 



Ga. Evaluation , of Several Environmental Eactors Influencing the 

 Absorption and Translocation of Herbicides by Johnson Grass> 

 (1) Study the absorption and translocation of chemicals which 

 appear promising for eradication or control of Johnson grass and 

 nutgrass. (2) Investigate production and dormancy of Johnson 

 grass seed. 



Agron. 108 (S-l8) Coop: ARS 



Idaho Physiological and Anatomical Effects of Herbicides and 



Associated Treatments on Canada Thistle, Perennial Ground Cherry , 

 Field Bindweed, and Poverty Weed . To develop information on be- 

 havior of four above named weed species as: relative rate and 

 direction of translocation of herbicides and effect of associated 

 treatments which may facilitate translocation; comparative anat- 

 omy or morphology of these species and relation of these factors 

 to environmental adaptability, competitive ability and methods of 

 control; effect of chemical and mechanical treatments on vegeta- 

 tive and sexual reproduction, 

 Agron. 295 (W-ll) 



