EFFECT OF LEAF AND BARK AQUEOUS EXTRACTS ON GERMINATION AND RADICLE LENGTH OF CROPS IN MIZORAM

Leaf and bark aqueous extracts of Anthocephallus chinensis,Albizzia procera and Aporosa octandra were tested on crops viz.Oryza sativa, Glycine max and Brassica campestris for phytotoxiceffects on germination and radicle length. Leaf and bark extracts oftrees inhibited the germination and radicle length of all crops exceptG. max for radicle length in bark aqueous extract of A. chinensis,which stimulated to the extent of 30.03% over control. The lowestgermination of crops (irrespective of trees and source of extracts)was for B. campestris (55 %) followed by O. sativa (82.5%) and G.max (84.5%). Similarly, like germination, maximum growth ofradicle was for G. max (8.42 cm) followed by O. sativa (4.72 cm)and B. campestris (2.95 cm). Thus, in order of toxicity of trees(irrespective of crops) were Aporosa octandra Albizzia procera Anthocephallus chinensis. However, the tolerance in crops was inorder of (irrespective trees and source of extract) G. max O.sativa B. campestris.