Studying on chemical control technology of the weeds of the dry direct-seeded rice of single-middle-late season

In this paper the field experimentation was conducted during in 2012 in Huida Farm, Huizhou County, Guangdong Province. The main treatment is herbicide (Pretilachlor + Bensulfuron-methyl, Yangguo and Butachlor), the sub-treatment is application method (soil treatments,seedling treatment and integrated treatment). Results of investigation showed that under the soil moist conditions two methods can significantly controlled weed when were applied at 1 or 2 days after the seeding. one which 80 g of 36% Pretilachlor+4% Bensulfuron-methyl deluted to 50 kg of water was sprayed on the leaves of the weed per 667 m2; another which 200 g of 23.9% Butachlor +1.1% Bensulfuron-methyl mixed with 15 kg of sandy soil were applied on the pad per 667 m2.