Interferência de plantas daninhas na cultura do feijão-caupi em São Gonçalo-PB.

Abstract

The cowpea is an important crop in Brazil, especially for the Northeast, yet the factors that reduce its production are weeds. The objedive of the study was to evaluate different periods of coexistence of cowpea with weeds in their productivity. Has been used the cowpea cultivar BRS novaera. The experiment was conducted at the São Gonçalo -PB, duãng the months of August and Odober 2010, the design was 30 days after crop emergence, the early of cowpea is. delayed with ncrease the culture of mexistence of weeds, the average length of pods, pod diameter, weight of hundred seeds, grain yield per plant, grain yield, number of pods. per plant and number of grains per pod were negatively affected when culture remains in presence with the weeds. In general, the cultivation of cowpea is adversely affected by the presence of weeds.