Study on the applied techniques of the herbicide,Butachlor,in vegetable fields

The paper set forth the study on the applied techniques of the herbicide, Buta-chlor, that was particularly used in rice fields originally, control efficiency in vegetable fields. The results showed that the effective dosage of the herbicide used in water spinach (Ipomoea repians), interplanting dishcloth gourd (Luffa cylindrica), pak choi (Brassica chmensis), spinach (Spinacia oleracea), chinese cabbage (Brassica pekinensis), cabbage mustard (Brassica alhoglabra). cabbage (Brassica oleracea var capitata), leaf mustard (Brassica juncea) and rape (Brassica napus) vegetable fields is 60-90 g/M u. The total control rates are 80.7-93.5% among which, the average rates of 8 species of annual weeds in Gramineae, 3 species of annual weeds in Cyperaceae and 4 species of weeds in Compositae and Scrophu 1 ariaceae are 91.5%, 98.6%, 93.4% and 95.8% respectively. At the same time, it was proved that Butachlor was safe and economic for using in vegetable fields. The herbicids. Butachlor, has been used more than 100000 Mu of vegetable fields in past seven years.