Diffusion of chlornitrofen in water from the bubbling tablets and its herbicidal efficacy [to Irrigated rice]

• Published in: Journal of Weed Science and Technology Vol. 39; no. 2; pp. 120 - 124
• Main Authors: Hirase, K. (Mitsui Toatsu Chemicals Co. Ltd., Mobara, Chiba (Japan)), Koda, S, Shimono, S, Nishida, M, Asano, T
• Format: Journal Article
• Language: Japanese
• Published: The Weed Science Society of Japan 1994
• Subjects: AGUA DE RIEGO; ARROZ IRRIGADO; AZOTE; BIFENIL; BIPHENYL; BIPHENYLE; bubbling agent; CHLORIDES; chlornitrofen (CNP); CHLORURE; CLORUROS; COMPLEJOS ORGANOMINERALES; COMPLEXE ORGANOMINERAL; DESHERBAGE; EAU D'IRRIGATION; ESCARDA; ESPUMACION; ETER ETILICO; ETHER; ETHYL ETHER; FOAMING; FORMULACIONES; FORMULATION; FORMULATIONS; herbicidal activity; IRRIGATED RICE; IRRIGATION WATER; MOUSSAGE; NITROGEN; NITROGENO; ORGANOMINERAL COMPLEXES; release in water; RIZ IRRIGUE; tablets; WEED CONTROL
• ISSN: 0372-798X; 1882-4757
• DOI: 10.3719/weed.39.120

Some properties of the tablets of chlornitrofen (CNP) including sodium hydrogencarbonate and tartaric acid as bubbling agents, which are used for weed control in paddy fields were investigated under green house conditions. The results are summarized as follows. 1. The rate of emission and amount of the bubbling gas increased when the water temperature increased between 10°C and 30°C. At the same time, the amount of chlornitrofen released into water and the herbicidal efficacy on barnyardgrass also increased. 2. The properties of the formulation were affected by the humidity conditions of the tablets during storage. At a higher humidity level, the amount of bubbling gas was smaller than at a lower humidity level. The loss of the bubbling activity resulted in the decrease in the amount of released chlornitrofen and herbicidal efficacy.