Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

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Weeds as hosts of microorganisms in an agroecosystem succession Zea mays L.- Phaseolus vulgaris L.

Abstract

The competition between weeds and crops is a topic of great interest, since this interaction can cause heavy losses in agriculture. Despite the existence of some studies on this subject, little is known about the importance of soil microorganisms in the modulation of weed-crop interactions. The competition between weed plants and crops promotes changes in the microbial community of the soil. The objective of this work was to determinate microorganisms in the rhizosphere of weed plants. In a Red Ferralitic soil, six experiments were conducted to know the possible benefits of timely management of weeds in corn (Zea mays L.) and bean (Phaseolus vulgaris L.) crops in a successional system for which the structural changes of the weeds and the influence of these on the fertility and presence of soil microorganisms were determined. The dominant species of weed was Sorghum halepense L. in both crops. The interspecific weed-crops relationships increased the nutrients and biodiversity associated with the productive system. 31 species of weeds were recorded (15 in corn and 16 in beans). Amaranthus dubius L., S. halepense L., Parthenium hysterophorus L., and next to them, Eleusine indica L. and Lepidium virginicum L., harbored the highest amount of microorganisms in the rhizophore.