Studies on the rates and application timing of tank mixture of pretilachlor and cinosulfuron in pre-germinated direct seeded rice
1992
Sombat Chinawong | Santi Suwankanti (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Studies on the rates and application of tank mixture of pretilachlor and cinosulfuron in pre-germinated direct seeded rice were conducted in a farmer field in Bangken district, Nakorn Pathom province during the dry season of 1991. The herbicides were applied at 4, 6 and 8 days after seeding (DAS). The mixture of pretilachlor and cinosulfuron gave better weed control than that of the single treatment. Pretilachlor at a rate of 64 g ai/rai gave better control when applied at 4 DAS and was less effective at 6 and 8 DAS. The efficacy of these herbicides was increased with higher rate of application. Slight phytotoxicity to rice was observed at 10 DAS but plants recovered within 30 days after application.
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