Herbicidal dispersion and efficacy of a flowable formulation of pyributicarb/bromobutide/benzofenap mixture using several application methods

• Published in: Journal of Weed Science and Technology Vol. 40; no. 4; pp. 262 - 270
• Main Authors: Jikihara, Kazuo, Mukaida, Hideshi, Maruyama, Toshishiro, Ichizen, Nobumasa, Konnai, Makoto
• Format: Journal Article
• Language: Japanese
• Published: The Weed Science Society of Japan 1996
• Subjects: application methods; diffusion; flowable; formulation; herbicidal efficacy
• ISSN: 0372-798X; 1882-4757
• DOI: 10.3719/weed.40.262

The diffusion and efficacy of a flowable formulation of a pyributicarb/bromobutide/benzofenap mixture (TSM-612 flowable), applied with a uniform pouring method, center line pouring method, multiple border pouring or a single border pouring method were evaluated in a paddy field at Ami, Ibaraki, Japan in 1990. The uniform pouring method provided a uniform herbicide layer and excellent control against Echinochloa oryzicola Vasing., Monochoria vaginalis (Burm. f.) Presl var. plantaginea (Roxb.) Solms-Laub. and Scirpus juncoides Roxb. subsp. juncoides Roxb. in the whole paddy area. With the methods of center line pouring, multiple border pouring and single border pouring, diffusion of each active ingredient of pyributicarb/bromobutide/benzofenap was detected within 10m from the application point and excellent control of E. oryzicola, M. vaginalis var. plantaginea and S. juncoides subsp. juncoides was obtained. It seems that pouring application of TSM-612 flowable from both levees would be applicable for paddies less than 20m wide. The influence of soil type and water depth on the diffusion of TSM-612 flowable were also examined under 16m2 (4m×4m) micro paddy conditions. No difference in the diffusion of each active ingredient between Ami (OM; 6.29%, Clay; 26.72%) and Aichi (OM; 1.36%, Clay; 16.35%) soil was confirmed at 24 hours after application. The diffusion velocity of each active ingredient was confirmed to be much faster under 6cm than under 1.5m water depth conditions.