Alternatives for volunteer corn RR® management need further knowledge in the product scope with residual effect, mainly for use in pre-emergence of the soybean RR®. This paper evaluated the performance of residual herbicides to control this species, when applied in soybean using the method “plant-apply”. The experiment was carried in the municipality of Santa Maria/RS, crop season 2015/16; evaluating herbicides applied in pre-emergence of soybean crop and corn RR®. The experimental design was randomized blocks with eight treatments and four […]

The species of Murdannia nudiflora belongs to the family Commelinaceae is known as doveweed. Because of competitive capacity and tolerance to glyphosate this species growing during the soybean crop cycle, presenting rapid growth when the leaf senescence of soybean occurs difficulting weed management in others cultures. The objective of this study was to evaluate the efficiency of different active ingredients of herbicides in combination or separately, and verify the best dosage of the active ingredient, which provided the best control […]

The commercial release of the Roundup Ready® soybean helped the management of weeds and allowed the application of glyphosate during the post-emergence of the culture. However, the intensive use of this herbicide selected resistant hairy fleabane biotypes and hindered control. Many works evaluate the technical effectiveness of herbicides, however, most of the times; the economic return is not analyzed when making decisions about the choice of which herbicide to apply. The aim of this work was to evaluate the technical […]

Many species of the genus Digitaria are known as crabgrass and occurs in the main agricultural crops, especially in sugarcane production, which uses mostly photosystem II inhibitor herbicides for weed management. Due to the complexity of the cultivation system and the problems attributed to the substitution of susceptible species weeds by tolerant species of crabgrass populations, the objective of this work was to verify the control of crabgrass species using photosystem II inhibitor herbicides (PSII) in pre-emergence. The experiment was […]

The chemical weed control is the most used in sugarcane culture, and studies covering the effects of these herbicides on the development of pre-sprouted seedlings of sugarcane. The objective of this work was to evaluate the effect of the herbicides ametryn, clomazone, hexazinone + diuron, metribuzin, sulfentrazone and tebuthiuron isolated and in association with saflufenacil in the initial growth of pre-sprouted seedlings of sugarcane varieties at different times of application. The experiment was conducted in a greenhouse in a completely […]

Despite the extensive cultivated area in Brazil and the growing demand for information about weed control, few studies are found in literature reporting the efficacy and selectivity of herbicides for cowpea (Vigna unguiculata). View of this, this work was developed in order to evaluate the selectivity and efficacy of herbicides for cultivars of cowpea. The experiment was conducted in a randomized block design in factorial scheme 2 x 13, with two cowpea cultivars (BRS Xiquexique and BRS Guariba) and 13 […]

Maize with tolerance to the herbicide glyphosate (Roundup ReadyTM) (RR2TM maize) has been increasingly used, since it favors the use of this herbicide to control weeds. Thus the objective of this study was to evaluate the tolerance of the hybrid 2B810PW (RR2/LL), submitted to the application of isolated and associated of glyphosate, glufosinate and atrazine at post-emergency (V4). The assay was carried out in the field, in the harvest 2013/14, and the design adopted was a randomized block with four […]

The use of chemical ripeners is a reality in the sugarcane sector. The objective of this work was to evaluate the technological and productive parameters of sugarcane when submitted to the application of chemical ripeners in the beginning of the harvest. The experimental design used was in randomized blocks arranged in split plots with four repetitions. The main plots consisted of the application of the following products with their respective dosages: control – without application; sulfometuron-methyl 0.02 kg ha-1 + […]

Among the practices that aim to confer sustainability of the agricultural soil, the use of green manure and/or cover crops such as crotalaria are advocated. The management of weeds is one of the practices for the success of crotalaria. However, the information about the selectivity of herbicide are scarce and these are of paramount importance. The objective of this study was to evaluate the selectivity of different herbicides applied in post-emergence of showy crotalaria (Crotalaria spectabilis). Two experiments were conducted […]