5种除草剂防除旱直播稻田杂草比较试验

42%噁草·丁草胺EC1 500 mL/hm2对鳢肠的防效为82%,对禾本科杂草、大多数阔叶杂草及莎草均有良好的防除效果,防效均达100%;33%二甲戊灵EC 2 250 mL/hm2对旱莲草的防效为64.7%,对禾本科杂草和部分阔叶杂草及莎草的防效均在86%～100%之间;30%苄·丁WP2 250 g/hm2和35%苄嘧.丙草胺WP 900 g/hm2对阔叶杂草和莎草科杂草的防效较好,但对禾本科杂草的防效较差;30%丙草胺EC1 800 mL/hm2对稻田多种杂草的防效均低于63%。

Comparative Test of Weed Control Efficacy of Five Herbicides in Dry Direct-seeding Rice Field

This field experiment selected five herbicides to apply in the dry direct-seeding rice field for comparative test of its weed controlling efficiency.The results showed that weeds controlling effeciency of butachlor+oxadiazon 42%EC 1 500 mL/hm2 was 82% to control Yerbadetajo Herb,100% to control poaceae weeds,most broadleaf weeds and sedges;controlling efficiency of phendimethalin 33% EC 2 250 mL/hm2 was 64.7% to control Yerbadetajo Herb,86%~100% to control poaceae weeds,some broadleaf weeds and sedges;controlling efficiency of butachlor+bensulfuron methyl 30% WP 2 250 g/hm2 and pretilachlor+bensulfuron 35% WP 900g/hm2 was higher to broadleaf weeds and sedges,but low to poaceae weeds;controlling efficiency of pretilachlor 30%wp 1 800g/hm2 was lower than 63% to most of the weeds varieties in the rice direct-seeding field.