The weed management in soybean cultures stands out as an important tool to ensure its high yield potential. The direct tillage advent increased the importance of management performed in the soybean off season and pre-seeding, in order to avoid the weeds interference in the initial cultivation period. The survey was conducted in order to evaluate the weeds control and the agronomic performance of conventional soybean, using different desiccant herbicides. The experiment was conducted in randomized blocks design with four replications. […]

With the introduction in national agriculture of corn hybrids resistant to glyphosate herbicide, weed management, especially grasses, it was favored. However, volunteer maize plants coming from grains lost in mechanized harvesting can cause significant losses in crops subsequently sown, which has often been soybeans. Thus, the aim of this study was to evaluate the effect of different herbicides in controlling volunteer maize plants resistant to glyphosate herbicide. The experiment was conducted in the Brazilian municipality of Nova Xavantina, MT, between […]

Ryegrass is an important weed in maize crops and winter cereals. The emergence of glyphosate-resistant biotypes, the main herbicide used in the Brazilian agricultural system, and the ability of natural reseeding, have raised the need to seek alternatives to minimize seed bank replenishment of this species. The objective of this study was to evaluate the effect of herbicide application at different growth stages of glyphosate-sensitive ryegrass plants on the viability of seeds from these plants. To this end, ryegrass plants […]

The adoption of weed management practices is one of the main tools that can contribute to increased grain yield in wheat crops. This study has aimed to evaluate the efficiency of the chemical group of the sulfonylurea herbicides, alone and in combination, at different times of the application, on the productivity of wheat cultivars, and control of annual ryegrass (Lolium multiflorum L.). The design was randomized blocks with 5 repetitions. The treatments were arranged in a 4 x 2 x […]

The objective of this paper was to identify alternatives for the chemical handling of weeds that infect wheat, as well as verifying the phytotoxicity of herbicides on the crop. The experiment was carried out in randomized blocks, organized in a factorial design of 2x 13, with four repetitions. The wheat crops were allocated to factor A (Quartzo and Pioneiro) and the herbicides to factor B (iodosulfuron – 0,100 kg ha-1; imazapic + imazapyr – 0,140 kg ha-1; clomazone 0,800 L […]

Aimed to evaluate the herbicide efficiency applied pre-emergence for Digitaria insularis when glyphosate resistant control in bean crop. The experimental design was a randomized complete block design with four replications. Treatments consisted of seven different managements of D. insularis: weeded witness, witness without weeding, s-metolachlor (1.440 g ha-1 a.i.), clomazone (648 g ha-1 a.i.), imazethapyr (106 g ha-1 a.i.), flumioxazin (50 g ha -1 a.i.), imazethapyr + flumioxazin (106 + 50 g ha -1 a.i.). D. insularis were seeds sown […]

Some invasive species has shown potential to develop resistance to glyphosate herbicide in no-till areas. Herbicides inhibitors of ACCase enzyme may be an alternative control to Digitaria insularis (L.) Fedde. The objectives of this study were to identify the occurrence of resistance in D. insularis (L.) Fedde to glyphosate in tillage areas of the State of Paraná, and find the appropriate clethodim doses for its control. Were conducted two experiments in a greenhouse in Bandeirantes-PR, where the first was the […]

Herbicides that present long persistence in the soil can cause problems in crops sown in succession due to the soil’s residual effect. That way, the objective of this paper was to evaluate the effects of herbicides applied in the pre-emergence of the cotton to the productivity of corn grown in succession. The experiment was installed in the municipality of Santa Helena de Goiás – GO. The application of herbicides treatments were carried out in a pre-emergence state of the cotton […]

The use of ripeners has been common practice in sugarcane cultivation. The application of these products is often performed through aerial spraying, which increases the chances of molecules from the ripener drifting into other crops, such as corn. With the aim of studying possible phytointoxication in corn caused by ethephon drift, a field experiment was conducted in order to evaluate the effect of ripener sub-dosing when applied in the V4 and V8 development stages of corn cultivation. The experiment was set […]

Searching for renewable energy sources has motivated the development of biodiesel production units in Brazil. However, for biodiesel being considered fully sustainable, suitable destinations for its production waste should be found, especially for crude glycerin. Therefore, this work was developed to evaluate glyphosate herbicide efficacy on weed control when combined to different concentrations of non-purified residue of biodiesel production. Two experiments were carried out, one in an experimental plant nursery, using sourgrass (Digitaria insularis) as bioindicator, and another one in […]