TY - JOUR AU - Tanji, K. K. AU - Biggar, J. W. AU - Mehran, Mohsen AU - Cheung, M. W. AU - Henderson, D. W. TI - Herbicide Persistence and movement studies with molinate in rice irrigation management JF - California Agriculture JO - Calif Agr Y1 - 1974/05/01 VL - 28 IS - 5 SP - 10 EP - 12 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v028n05p10 AB - These studies investigated the persistence of molinate (a selective herbicide registered for use in rice culture to control watergrass, or barnyardgrass) in flood and seepage waters, residues, and extent and speed of chemical movement. Results from these and earlier experiments show that water management and circulation in flooded rice fields are important considerations. Regardless of how uniformly a chemical is applied, downstream movement of water tends to redistribute it. Gusty winds can also modify chemical distribution. The redistribution of chemicals can be minimized by holding flood waters for a few days after application. Soil incorporation gives less residue in flood waters and drains than does water application.