二氯喹啉酸对水稻后茬作物的安全性研究

Studies on the Safety of Quinclorac for Succeeding Crops of Paddy Rice

针对湖北省水稻(Oryza stativa)田常用除草剂二氯喹啉酸对后茬作物的安全性进行试验。结果表明,50%二氯喹啉酸WP有效成分300 g/hm2对水稻后茬作物西芹(Apium graveloens)具有轻度的抑制作用,表现为株高和产量稍低;50%二氯喹啉酸WP有效成分225、300 g/hm2对水稻后茬作物烤烟(Nicotiana tabacum)有轻度药害,症状为心叶扭曲、黄化且叶片较小;50%二氯喹啉酸WP有效成分225、300 g/hm2对水稻后茬作物棉花(Gossypium hirsutum)、番茄(Lycopersicon esculentum)和茄子(Solanum melongena)安全。对照药剂2.5%五氟磺草胺OD有效成分22.5、37.5 g/hm2对水稻后茬作物西芹、烤烟、棉花、番茄和茄子安全。

The safety of quinclorac commonly applied in succeeding crops of paddy rice fields in Hubei province was studied.The results showed that 50％ quinclorac WP at the rate of 300 g/hm2 slightly inhibited the growth and yield of the succeeding crop celery （Apium graveloens）.50％ quinclorac WP at the rate of 250 and 300 g/hm2 mildly injured the succeeding crop tobacco （Nicotiana tabacum）.The symptoms included twisting yellow spear leaf and smaller leaves.50％ quinclorac WP at the rate of 250 and 300 g/hm2 were safe for the succeeding crops cotton （Gossypium hirsutum）,tomato （Lycopersicon esculentum） and eggplant （Solanum melongena）.Meanwhile,2.5％ penoxsulam OD was safe for these five succeeding crops mentioned above.