Optimizing herbicide selection for pre-emergence control of itchgrass and cypressvine morningglory in sugarcane

Abstract

The aim of this study was to assess the efficacy of herbicides in association to control Rottboellia exaltata and Ipomoea quamoclit during pre-emergence while also to evaluate the potential impact on the sugarcane. The experimental design employed a randomized block with seven treatments and four replications. The treatments were: 1 – no herbicide application; 2 – indaziflam + sulfentrazone; 3 – indaziflam + diclosulam; 4 – indaziflam + tebuthiuron; 5 – flumioxazin + diclosulam, 6 – flumioxazin + pyroxasulfone and 7 – clomazone + sulfentrazone. The evaluated parameters were: percentage of weeds control, green coverage percentage (Canopeo® system), weed biomass (g m⁻²), itchgrass height, and sugarcane tiller. Several herbicide associations have been proven effective alternatives for managing itchgrass and cypressvine morningglory. The most successful treatments for itchgrass control were indaziflam + tebuthiuron (100%) and indaziflam + diclosulam (97%), whereas for cypressvine morningglory, the betters were indaziflam + sulfentrazone (97%), indaziflam + diclosulam (98%), indaziflam + tebuthiuron (97%), flumioxazin + diclosulam (94%), and clomazone + sulfentrazone (96%). All treatments reduced the weed biomass, with indaziflam + tebuthiuron being the safest option for protecting sugarcane.

Keywords:

• Sugarcane
• selectivity
• rottboellia exaltata
• ipomoea quamoclit
• canopeo®

Author contributions

Conceptualization of the manuscript and development of the methodology: R.A.C., S.G.Q.C., A.P. and L.T.; data collection, analysis and interpretation: R.A.C., S.G.Q.C., S.A.Q.C., G.O.N.S. and L.T.; funding acquisition and resources: S.G.Q.C., S.A.Q.C. and A.P.; project administration: S.G.Q.C.; L.T. and P.J.C.; writing, review and editing: R.A.C., S.G.Q.C., S.A.Q.C., A.P., G.O.N.S., L.T. and P.J.C. All authors have read and agreed to the published version of the manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data supporting the findings of this study are available from the corresponding author, R. A. C., upon reasonable request.

Additional information

Funding

The author(s) reported there is no funding associated with the work featured in this article.