Phytosociology of We Ed Communit Y in Culture of Cowpea ( Vigna Unguiculata L. Walp ) and Controlling Possibilities With P Re - Emergent Herbicides
Year: 2018
Type: article
Abstract: This study has aimed to diagnose and compare the predominant weed species in cowpea crop in the Amazon region and to evaluate the effectiveness of herbicides applied in pre-emergence.The weed sampling was obtained before planting, the cowpea cultivar was BRS Aracê, by collecting all the plants present within a 0.25 m² hollow frame, randomly thrown 40 times in experimental area to calculate the phytosociological indices.The herbicide efficiency experiment was conducted in a randomized block design with four replications, in time subdivided plot model.Treatments were applied one day after crop planting, their doses (g/ha ai) were: metribuzin (360), sulfentrazone (600), S-metolachlor (1200), pendimethalin (750), oxadiazon (1000), alachlor (2400), metribuzin + pendimethalin (360 + 750), metribuzin + alachlor (360 + 2400), manual weeding and weedy check.The evaluations of weed control were done at 21, 28 and 35 DAP.The most important weed in phytosociology was Tridax procumbens.Cultivation of the crop with weeds caused a reduction of more than 66% in crop productivity.The application of the metribuzin herbicide prevented the emergence of all cowpea seedlings while oxadiazon satisfactorily controlled the weeds without affecting the crop yield.
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: diamond
OpenAlex ID: W2898233183