The study aimed to evaluate the efficiency and residual effect of herbicides, applied in management operations, in modalities “Apply-Plant” and “Anticipated Management” in soybean crop. The experimental design was randomized complete blocks with four repetitions in 8 x 2 factorial scheme, with eight herbicides associations (with flumioxazin, chlorimuron-ethyl and glyphosate) in two management systems. For “Anticipated Management” was conducted glyphosate application 20 days before sowing, with treatments being applied two days after planting. For “Apply-Plant” system, treatments were applied one […]

Studies on chemical management of green manure are scarce in national literature. This work aimed to evaluate the herbicides efficiency in chemical control of green manure used in succession with sugarcane crop, in minimum cultivation system. Two experiments were conducted with Mucuna aterrima and Crotalaria spectabilis species, arranged in a randomized complete block design with 19 treatments and four replicates. The treatments were composed by three distinct rate for herbicides: glyphosate+2,4-D+carfentrazone-ethyl; glyphosate+2,4-D; glyphosate+MSMA; 2,4-D+carfentrazone-ethyl; 2,4-D; 2,4-D+picloran and check without herbicide […]

The present work aimed to evaluate the efficacy of flumioxazin applied over the soil or in association with sugarcane mulch, followed by different periods without the rain occurrence. The experiment was conducted in vases under greenhouse conditions in Botucatu County, São Paulo, Brazil. Vases were filled with soil and Brachiaria decumbens, Digitaria horizontalis, Ipomoea nil, Ipomoea grandifolia, Bidens pilosa and Sida rhombifolia weeds were sown and then covered or not with sugarcane mulch, depending on the treatment used. The experimental […]

Knowing the stage where the weed is more susceptible to chemical control is a fundamental part of weeds integrated management. In the specific case of C. bonariensis that is a weed with difficult control, this knowledge has a direct influence on herbicides efficiency. Thus the aim of the present study was to evaluate the effectiveness of glyphosate + 2,4-D and glufosinate herbicides in controlling C. bonariensis sprayed at different stages of development. Treatments were arranged in a 2×5 factorial scheme, […]

The objective of this work was to evaluate herbicides efficacy and selectivity applied in post-emergence for controlling weeds in two corn cultivars. The experiment was conducted between December/2007 and April/2008, at FEP – UNESP, Selviria County/MS. The experiment was conducted in conventional tillage, by using seven treatments and four replications, in split plot scheme for cultivar factor: Pioneer 30 S31 and Dow Agroscience 2B710. Applications were effected in crops and weeds post-emergence, 7 and 14 days after crop emergence, by […]

Portulaca oleracea is found intervening in several crops mainly vegetables, besides crops like sugar cane and cotton. The study was developed with the objective of improving the recommendation of herbicides alternatives in pre emergency used on cotton crop, for controlling P. oleracea. The work was conducted in two stages in greenhouse conditions: the first to establishing, through dose-response curve, herbicides rates able to promote efficient control of P. oleracea; the second one, to verify the period of residual activity provided by […]

The aim of this study was to evaluate the association between the herbicides clomazone + hexazinone applied during a dry period and at different doses, on soil and sugarcane mulch, in the weed control. The experiment was applied in August 22, 2007 in Santa Maria, São Paulo, Brazil. The experimental plots were constituted of five sugarcane lines spaced in 1,5 m, with 6 m of length. In the plots were sown the weeds Brachiaria decumbens, Euphorbia heterophylla, Ipomoea grandifolia, Ipomoea nil, […]

Mechanized harvesting has introduced some new factors in the cultivation of sugar cane which affect the dynamics of occurrence and weed control. One such factor is the operation of break-backs performed 60 to 90 days after planting in order to standardize the soil to work the machine harvester, but this operation causes damages to residual herbicides applied at planting. The present work was to evaluate the selectivity and performance of chemical weed control applied in two seasons: the planting of the […]

The management of weeds in the sugarcane is based on the integration of cultural methods, mechanical, physical and chemical. As a physical measure, there is the presence of waste straw from mechanical harvesting, which may act as a barrier, reducing the infestation of weeds or as a physical barrier on the action of herbicides on weed control when applied in preemergence of these plants on the straw of the sugar cane. As a result, the objective of this work is […]

This work aimed to evaluate the efficacy of flumioxazin applied over soil and over oat and corn mulch for controlling weeds, after different periods of permanence without rain. The experiment was carried out in vases, under greenhouse conditions in Botucatu County, São Paulo, Brazil. Vases were filled with soil, and weeds seeds of Brachiaria decumbens, Ipomoea nil, Digitaria spp, Bidens pilosa, Ipomoea grandifolia and Sida rhombifolia were sown and covered or not with oat and corn mulch, depending on the […]