Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Pre-emergent herbicides for volunteer corn and sourgrass control.

Abstract

Volunteer corn and sourgrass stand out as the main invasive species in soybean crop, causing yield losses due to interference process. In this context, the objective of this study was to evaluate the efficacy of herbicides applied in preemergence herbicides for the control of volunteer corn and sourgrass. The study was carried out in greenhouse conditions, in completely randomized design with six treatments and four repetitions. The treatments were: S-metolachlor (1152 g ha-1), diclosulam (25.2 g ha-1), imazethapyr (80 g ha-1), flumioxazin (60 g ha-1), [imazethapyr + flumioxazin] [106 + 50 g ha-1] and control without herbicide. The applications were performed immediately after sowing the species, proceeding the wetting of the soil contained in the pots. The control at 14, 21 and 28 days after emergence (DAE), number of emerged plants and dry mass of plants at 28 DAE were evaluated. For the control of volunteer corn, the best treatments were [imazethapyr + flumioxazin] and diclosulam. S-metolachlor, flumioxazin and association between [imazethapyr + flumioxazin] provided the highest levels of sourgrass control. For the pre-emergence control of the two species, the best alternative consisted of the association between [imazethapyr + flumioxazin].