Study on chemical control technique of Scirpus lineolatus.

In order to control Scirpus lineolatus plants in direct-seed rice fields,field experiments were carried out by using different herbicides and application methods.The results showed that firstly treating the soil with 10%pyrazosulfuron-ethyl WP at 300 g/hm~2 before seeding and secondly applying 10%pyrazosulfuron-ethyl WP at 300 g/hm~2(or 30%bensulfuron-methyl WP at 225 g/hm~2 or 30% anilofos EC at 4 500 mL/hm~2)at 1.5-leaf stage of rice could efficiently control the damage caused by S.lineolatus plants,and the control efficiency could reach over 97.57%(by plants) at 28 days after application and still above 84.02%(by fresh weight of plants)at 148 days after application.The above herbicides proved to be safe for rice growth and to have an obvious effect on increasing rice yield.