Potencial alelopático diferencial de cultivares de trigo (triticum aestivum L.) chileno sobre algunas malezas asociadas al cultivo en el sur de Chile

Abstract

The objective was: to evaluate the allelopatic potential of 50 wheat cultivars on four weed species associated with this culture in south Chile. The experimental design was in blocks with four repetitions. The longest main root of the receptive species (weed) was evaluated eighteen days after the establishment of the last one. The transformed data into percentage of inhibition of root length of the receptive species in relation to the control was analized using ANDEVA, cluster analysis and Tukey (P≤0.05). The allelopatic potential of fifty wheat cultivars in most cases root development of was inhibited and occasionaly some weeds were potentiated. The more inhibitory cultivars were Perquenco, Metrenco, Aztec and Baroudeur (range 57 and 65%) and with less potential Dollinco, Tilburi, Tukan and Bingo (range 20 and 29%); the other cultivars showed a ntermediate inhibition. The interaction allelopatic between wheat cultivars and weed species was: Spergula arvensis (+10 and 88%), Rumex acetocella (+8 and 70%), Avena fatua (+36 and 74%) and Vulpia bromoides (+11 and 68%).