CONTENTS 



Page 



I. Chemicals used for weed control 2 



Phenoxy c ompounds 2 



2, 4-dichlorophenoxyethyl sulfate (sesone) 3 



Substituted phenols 3 



Carbamates 4 



Substituted urea herbicides 5 



Trichloroacetic acid (TCA) 5 



2, 2-dichloropropionic acid (dalapon) 5 



3-amino-l, 2, 4-triazole (amitrol) 6 



N-1-napthyl phthalamic acid (NPA) 6 



3, 6-endoxohexahydrophthalic acid (endothal) 6 



1, 2-dihydro-pyridazine-3, 6-dione (maleic hydrazide, MH).„ 7 



Phenyl mercuric acetate (PMA) 7 



Potassium cyanate (KOCN) 7 



Calcium cyanamide 7 



Ammonium sulfamate 8 



Herbicidal oils 8 



Chlorates 8 



Boron c ompounds 9 



Ar s enic als * 9 



2-chloro-N, N-diallylacetamide (CDAA)... 10 



Dichloral urea (DCU) 10 



Methyl bromide 10 



2, 3-dichloro-l, 4 -naphthoquinone (dichlone) 10 



Rosin amine D acetate (RADA) H 



New chemicals available for experimental and trial use H 



II. General considerations in the use of herbicides 13 



Basis for purchasing herbicides 13 



Spray e r c alib ration . 13 



Effect of weather conditions on spraying 15 



III. Weed control in field crops 17 



Corn 17 



S o r ghum 18 



Wheat, barley, and oats--fall or spring seeded 18 



Flax 19 



Cotton 20 



Soybeans 21 



Pe anut s 21 



Rice 22 



Sugar beets 22 



Tobacco (plant beds) 22 



IV. Weed control in horticultural crops 24 



Vegetable crops 



Asparagus 24 



Beans 24 



Beets 24 



Cole crops (cabbage, cauliflower, broccoli, Brussels 



sprouts) 24 



Cantaloupe s 25 



Carrots, celery, dill, parsnips, parsley 25 



Cucumbers 25 



