Weed Control J 2022; 21: e202200758

Research Article

Chemical control of Maranta sobolifera

DOI: 10.7824/wcj.2022;21:00758

Abstract

Blackground

The species Maranta sobolifera L. Andersson (Caeté) is tolerant to chemical management and its dispersion in the agricultural areas of western Paraná has increased every year.

Objective

Evaluate the control of M. sobolifera using different doses of herbicides applied alone and in mixture in pot and field experiments.

Methods

In the pot experiment, isolated applications of glyphosate (2160 g ha^-1), carfentrazone (60 g ha^-1), and 2,4-D (670 and 1340 g ha^-1), as well as mixtures of [fluroxypyr + triclopyr] (320 + 960 and 480 + 1440 g ha^-1), glyphosate + carfentrazone (720 + 40 and 1080 + 60 g ha^-1), glyphosate + 2,4-D (1080 + 1340 g ha^-1), and glyphosate + [fluroxypyr + triclopyr] (720 + [320 + 960] and 1080 + [480 + 1440] g ha^-1), were the most efficient (>80%) at 42 days after application (DAA). While in the field, applications of glyphosate (>3000 g ha^-1), glufosinate ( 200 g ha^-1), carfentrazone ( 60 g ha^-1), saflufenacil (≥ 105 g ha^-1), 2,4-D ( 1340 g ha^-1) and the commercial mixture fluroxypyr + triclopyr ( 160 + 480 g ha^-1) were most efficient (>80%) starting at 21 DAA.

Results

The pot experiment used a completely randomized design with four repetitions, while the field, a randomized block design was used in a split- plot scheme in time, with three repetitions.

Conclusions

Carfentrazone and saflufenacil were more efficient at higher doses, and only the mixture glyphosate + carfentrazone (720 + 40 g ha^-1) showed synergistic effect.