Herbicidal characteristics of MT-147, a novel glycol benzyl ether as a graminicide in paddy rice

• Published in: Journal of Pesticide Science Vol. 31; no. 4; pp. 405 - 408
• Main Authors: Kakimoto, T.(Mitsui Chemicals Inc., Mobara, Chiba (Japan). Rand D Center), Hirase, K, Koizumi, F, Arai, K
• Format: Journal Article
• Language: English; Japanese
• Published: Tokyo Pesticide Science Society of Japan 01.01.2006; Japan Science and Technology Agency
• Subjects: 3,3a,5,9b-tetrahydro-2H-furo[3,2-c]benzopyran; ARROZ IRRIGADO; barnyardgrass; bromobutide; GRAMINEAS; GRAMINEE; GRASSES; HERBICIDAS; HERBICIDE; HERBICIDES; IRRIGATED RICE; MT-147; ORYZA SATIVA; RIZ IRRIGUE; transplanted rice
• ISSN: 1348-589X; 1349-0923
• DOI: 10.1584/jpestics.G06-21

The herbicidal performance of MT-147, (2R,3S,3aS,9bR)-2-ethyl-3-(2-fluorobenzyloxy)-6,7-methylenedioxy3,3a,5,9b-tetrahydro-2H-furo[3,2-c] [2]benzopyran, was examined as a graminicide for paddy rice. MT- 147 completely controlled barnyardgrass from pre-emergence up to the 2.0-leaf stage at 300 g a.i./ha by submerged application; however, the efficacy decreased as the leaf stage proceeded further. The herbicidal activity of MT- 147 was not influenced by water depth, but it was slightly affected by the seeding depth of barnyardgrass, the activity being lower when the seeding depth was deeper. MT- 147 had no phytotoxicity to transplanted rice at 300 g a.i./ha but phytotoxicity was observed when rice seedlings were placed on the soil surface and the roots were exposed to water. Bromobutide remarkably increased the herbicidal activity of MT-147 against barnyardgrass. In this study, it was revealed that a novel 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2]benzopyran, MT-147, has excellent herbicidal activity against barnyardgrass, and its activity was enhanced by bromobutide.