BARNYARDGRASS CONTROL BY DIFFERENT HERBICIDES IN RICE CROPS LOCATED IN THE EXTREME SOUTHERN STATE OF SANTA CATARINA

Authors

  • Diogo Crepaldi 1Instituto Federal Catarinense - Campus Santa Rosa do Sul
  • Jéssica Fernandes Kaseker UDC
  • Marcos André Nohatto 1Instituto Federal Catarinense - Campus Santa Rosa do Sul
  • Samuel Freguglia Bereta 1Instituto Federal Catarinense - Campus Santa Rosa do Sul
  • Eliete de Fátima Ferreira da Rosa 1Instituto Federal Catarinense - Campus Santa Rosa do Sul
  • Bruno Pansera Espindola 1Instituto Federal Catarinense - Campus Santa Rosa do Sul

DOI:

https://doi.org/10.28998/rca.21.13246

Keywords:

Echinochloa spp, chemical management, Oryza sativa, pre-germinated

Abstract

Barnyardgrass (Echinochloa spp.) is one of the main weeds in irrigated rice, as it is difficult to control due to morphophysiological similarities with the crop and aggravation of the problem of resistance to herbicides registered for the management of the species. In order to find alternatives for the management of this weed, this study was developed with the objective of evaluating the control of barnyardgrass resulting from the use of different herbicides applied after rice emergence, as well as their effect on the productivity of rice fields located in the extreme southern state of Santa Catarina. A field experiment was implemented in the 2020/2021 season in a randomized block experimental design with four replicates. Treatments were: florpyrauxifen-benzyl (30 g active ingredient ha-1), imazapyr + imazapic (105 + 35 g a.i. ha-1) and fenoxaprop-p-ethyl (82,8 g a.i. ha-1), in addition to control without herbicide application. Variables analyzed were: weed control (%) and crop phytotoxicity (%), evaluated at 12 and 40 days after application (DAA); and crop productivity (kg ha-1) at stage R9.  Based on results obtained, it could be concluded that the evaluated herbicides were efficient in the barnyardgrass management and, in general, were selective to the crop, resulting in improvement in grain yield, since the presence of weeds negatively interfered with the productive performance of irrigated rice.

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Published

2023-10-27

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Section

Produção Vegetal