The experiment was conducted with the objective of evaluating the selectivity of herbicides, applied in different times, in ornamental turf grasses. The first experiment was conducted in greenhouse conditions in randomized entirely design, with four replications, in a 4 x 5 x 2 factorial scheme. The factors corresponded to the pre-planting application herbicides ( sulfentrazone – 800 g ha-1, s-metolachlor – 1440 g ha-1 and atrazine – 2000 g ha-1 and  control without herbicide application) in five species of turfgrass: […]

This study aimed to evaluate the control of red rice and the selectivity to commercial mutant rice varieties under application of imidazolinone herbicides. The experiment was installed in completely randomized blocks design, under factorial scheme 4×4, with four replications. Factor A was composed by the herbicides and Factor B by doses of these herbicides. The herbicides and doses were: imazethapyr + imazapic [(0.00; 37.50 + 12.50; 75.00 + 25.00 and 150.0+50.00 g ha-1) + Dash 0.5 v v-1], imazapyr + […]

Safeners are chemicals applied to crops, usually by seed treatment, to improve their tolerance to herbicides. The objective of this research was to evaluate the potential use of dietholate as a safener for pre-emergence applications of clomazone in common beans. Treatments were arranged in a factorial combination 2 x 5 x 6 composed by two herbicide treatments (without or with clomazone at 750 g ha-1), five doses of dietholate (0, 125, 250, 375 and 500 g. a.i. per 100 kg […]

The aim of this study was to evaluate glyphosate application in Roundup Ready® soybean and yield at different levels of manganese applied by foliar way. The experiment was conducted in 2011/2012 agricultural year in Nova Maringa County, Mato Grosso State, in randomized blocks experimental design, in factorial scheme 3 x 4, with four replications. Three glyphosate levels (0.0; 0.972; 1.620 kg a.i. ha-1) and four manganese levels (0.0; 0.350; 0.700 and 1.050 kg ha-1) were used. Glyphosate was applied at […]

Chemical control of weeds in sugarcane crop may be performed in dry season, mainly due to agricultural operations planning, and logistics in relation to the use of equipment and labor. This study aimed to evaluate the agronomic efficacy of herbicides for controlling sugarcane grass weeds by using different periods of water restriction. Evaluated weeds were Digitaria nuda, Panicum maximum and Brachiaria decumbens. Herbicides treatments applied in total pre-emergency condition were: diuron + hexazinone + sulfometuron-methyl (1387 + 391 + 33.35; […]

The application of the mixture of glyphosate with 2,4-d took on great importance with high adoption of no-tillage system in the early 90s, and with the constant reports of weed biotypes resistant to glyphosate. However, studies on the drift of this mixture are still scarce. The aim of this study was to evaluate the potential drift of these herbicides, with or without the adjuvant, applied in wind tunnel. The experimental design was completely randomized considered, arranged in a factorial design […]

This study aimed to evaluate the weed control with the herbicide diuron sprayed in pre- and post-emergence, either under shade or full sun. It was studied the effect of the diuron at in the formulation 500 SC at 3.2 and 4.8 L ha-1 of the trade product on the plants of Euphorbia heterophylla, Ipomoea grandifolia and Raphanus raphanistrum sprayed in pre-emergence, as well as the same doses sprayed in post-emergence on plants of E. heterophylla, I. grandifolia and Senna occidentalis. […]

The objective of this study was to evaluate the effects of application of glyphosate and paraquat compared to mowing to control invasive grasses in degraded areas. For the present study, the area was divided into two areas with different values of penetration resistance of soil and the fresh weight of the shoots. In each environment were selected five plots of 6×6 m². Each plot was divided into four subplots receiving treatments: glyphosate (1,44 kg ha-1), paraquat (0,40 kg ha-1), mowing […]

Weed interference can cause severe damages to common bean grain yield. Although the use of herbicides is considered as an efficient means to control weeds, there are just a few alternatives to use in pre-emergence applications. The objective of this work was to evaluate the potential use of pre-emergence applications of clomazone for five cultivars of common bean. Experiments were carried out under greenhouse conditions in a completely randomized design, and the treatments were increasing rates of clomazone (0, 300, […]

The objective of this research was to evaluate contrasting textures soils (clay and loamy sand) in the leaching of diuron + hexazinone + sulfometuron-methyl (1386.9 + 391 + 33.35 g ha-1) commercial formulation, and also hexazinone (391 g ha-1), diuron (1386.9 g ha-1) and sulfometuron-methyl (33.35 g ha-1), in soil columns mounted in PVC pipes. One day after the herbicide application, half of the columns received 40 mm of simulated rainfall and Ipomoea triloba weed was sown. At 21 and […]