| botanical identification of several echinochloa biotypes collected in spanish rice fields with control failures of cyhalofop-butyl. | there is some disagreement about the species that constitute echinochloa. correct identification is agronomically and economically important because echinochloa spp. are aggressive invaders and difficult to control. the identification of echinochloa spp. is complicated because of the morphological diversity shown by the genus. this work was initiated because of the differential response to cyhalofop-butyl treatment shown by some populations of echinochloa spp. four biotypes were selected for bot ... | 2003 | 15149139 |