EFFECTS OF THE AQUOUS EXTRACT OF CANNAVALIA-ENSIFORMIS, BURSERA-GRAVIOLENS, PETIVERIA-ALLIACIA AND PARTHENIUM-HYSTEROPHOROS ON SORGHUM GERMINATION - TECHNICAL NOTE

A random block design was used for studying the effect, a the extract of some plants on sorghum 50 g of the fresh plant material were immers ed in 500-600 ml of water for 48 hr. Sorghum for 6 hr in the resulting liquid. In the first test (4 replications) the liquid obtained from p ure or 50% diluted Cannavalia ensiformis leaves were used; in the seco nd (6 replications) Bursera graviolens leaves, whole plants of Petiver ia alliacia and Parthenium hysterophorus was employed. 200 seeds were placed on humid filter paper in Petri plates. Seeds soaked in these li quids had a significantly lower germination with respect to the contro l water treated. This effect could be due to the release of allelopath ic substances not determined in this study.