(8) N-(3, 4-dichlorophenyl) -2-methylpentanamide is effective as a post- 

 emergence treatment for the control of small annual broadleaved weeds and 

 weed grasses in several vegetable, small-fruit, and ornamental crops. Oral 

 toxicity (LiDjQ = more than 10,000 mg./kg.) is low for rats. 



(9) N-(3, 4-dichlorophenyl)methacrylamide [DCMA] is effective as a di- 

 rected post-emergence treatment for control of small annual broadleaved 

 weeds and weed grasses in cotton. Other experiments have indicated that 

 several vegetable, field, and ornamental crops have a tolerance to post- 

 emergence treatnaents. Oral toxicity (LD50 = 3,l60 mg./kg.) is relatively low 

 for rats, 



(10) 0-(2, 4-dichlorophenyl) O-methyl isopropylphosphoramidothioate is ef- 

 fective for the control of germinating crabgrass and other annual >veed 

 grasses in established turf. Nonviable seed are formed when crabgrass is 

 sprayed during flow^ering. Oral toxicity (LD^g ~ more than 1,000 mg./kg.) is 

 relatively low for dogs and cats. 



(11) 2-chloro-4-diethylamino-6-isopropylanaino-s-triazine [ipazine] is ef- 

 fective as a post-emergence spray for the control of small annual weeds in 

 cotton. Oral toxicity (L,D „ = more than 5,000 mg./kg.) is low for mice. 



(12) 2, 3, 5, 6-tetrachloroterephthalic acid, the dinnethyl ester, is effective 

 in controlling many germinating annual broadleaved Aveeds and weed grasses 

 in turf and in field and horticultural crops. Crop tolerance to post-emergence 

 treatments suggests that it may prove useful for lay-by applications follo'w- 

 ing clean cultivation. Oral toxicity (L.D50 = rnore than 3,160 mg,/kg.) is rela- 

 tively low for rats. 



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