Mich. Control of Weeds by Chemical Means . To determine (1) some 

 effects of herbicides on basic physiological processes of weeds 

 and crop plants; (2) effects of herbicides on production, keep- 

 ing quality and palatibility of vegetable crop products; and (3) 

 effects of continued application of herbicides upon growth of 

 crop plants and weed populations in treated soils. 

 Bot., Farm Crops 32 Coop. ARS 



Mich. A Study of the Antimitotic Action of Various Organic Com- 

 pounds""Used as Insecticides, Fungicides and Herbicides . To (1) 

 assess antimitotic and potential mutagenic action of compounds 

 used in insect, fungus and weed control where previous field or 

 chemical studies may suggest that they have such activity; and 

 (2) classify active compounds as to type of antimitotic activity 

 shown on basis of established reactions. 

 Bot. and PI. Path. 99 



Mich. The Role and Fate of Herbicides, Antibiotics, Growth- 

 Regulating Substances and Other Compounds in Different Soil Types . 

 To (1) study residual effects of herbicides, antibiotics and 

 plant hormones in different soils; (2) find effect of various 

 compounds on microbial flora of soils; (3) find species of bac- 

 teria which might prove helpful in aiding disintegration of herbi- 

 cides; and (U) determine effect of biuret on plant growth, to de- 

 termine the cause of transformation of urea to biuret, and to de- 

 termine biuret content of various commercial sources of urea. 

 Bact, Hort, Soil Sci. 123 



Mich. Factors Affecting the Germination of Weed Seeds . To deter- 

 mine (1) physiological characters of dormancy in weed seeds; (2) 

 needs for testing viability of weed seeds; (3) factors affecting 

 weed seed longevity; and (U) develop methods of weed control 

 based on such improved understandings. 

 Bot. and PI. Path. U67 (NC-10) 



Minn. Weed Studies: — 3» The Physiol o gic and Anatomic Effects of 

 Herbicides on Weeds and Economic Crop Plants . To (l) elucidate 

 pertinent phases of the weed problem, (2) formulate control 

 measures, (3) evaluate control measures, and (U) make recommenda- 

 tions through proper channels to put findings into practices. 

 Agron., Bot, For., Hort., PI. Path. 2201-3 



Miss. Factors Relating to the Vegetative Reproduction in Some 



Perennial Weeds of Mississippi . (1) Learn population and extent 

 of underground reproductive systems; (2) how herbicide that shows 

 some control is effective and why it does not give complete con- 

 trol; (3) influence of external factors on production of above- 

 ground parts by under-ground organs; (h) internal factors that 

 may influence vegetative reproduction. (£) Study means by which 

 translocation of potentially herbicidal substances to all under- 

 ground parts may be enhanced; (6) means by which dormant under- 

 ground reproductive organs might be induced to produce above- 

 ground foliage and become amenable to chemical treatment. 

 PI. Path, and Physiol. HL-20 



