Articles

Results of the study of cross-resistance and effect of herbicide on crops in the production of cycloxydim-tolerant maize (Zea mays L)


Abstract


In Hungary, monocot weed species are present as a signiἀcant yield limiting factor. In practice there is a great demand for efἀciently applying agrochemicals against monocot weeds at a later period and without causing phy totoxicity. Field trials were carried out in 2010 and 2011. The trials aimed to understand whether the cycloxydim-tolerant (CT) maize have cross-resistance to herbicides expressing different graminicide action (quizalofop-p-tefuril, haloxyfop-r-methyl ester, propaquizalofop, Ḁuazifop-p-butyl). The obtained results conἀrm that CT maize has signiἀcant tolerance to cycloxydim active substance. Lower rates of other types of graminicides neither damage maize plants nor reduce the yield, while application of higher rates used to control perennial weeds do. According to the authors’ conclusions, no other types of graminicides can be used to perform chemical weed control in CT maize. Post-emergent use of cycloxydim showed excellent efἀcacy against monocot weeds: Echinochloa crusgalli, Setaria verticillata, Panicum miliaceum. It is well-known that growing genetically modiἀed maize is greatly restricted in Europe, therefore the published scientiἀc results provide good option for the control of monocot weeds in the maize growing areas.

Keywords

ACCase inhibitor; graminicide; ACCase resistance; monocotyledon weeds; weed control; herbicide tolerant maize, cycloxydim

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