Effect of Crude Extract of Euptorium adenophorum Spreng. On Germination and Growth of Some Crops and Weeds

Abstract

Allelopathic effect of croton weed (Eupatorium adenophorum Spreng.) was tested on seed germination inhibition with 19 species of crops and weeds at room temperature after 5 days treated and growth inhibition of 3 species wee tested at 30 ?C. It showed that gemination 9 species (Amaranthus spinosus Linn., A. viridis Linn., Bidens pilosa Linn., Borreria alata DC., Brassica oleracea Linn var. capitala Linn, Celosia argentea Linn, Pennisetum polystachyon (L.) Schult., Aeschynomene americana Linn., and Dactyloctenium aegyptium (L.) P.B.) were strongly inhibited (90-100%), 3 species (Phaseolus lathyroides Linn.f, Brassica alboglabra Barley, Oryza sativa Linn. cv RD23) were moderately inhibited (50-89%), 5 species (Phyllanthus amarus Schum. & Th. Kongl., Mimosa invisa Mart., Oryza sativa Linn. cv Nam Ru, Zea mays Linn., and Oryza sativa Linn. cv Sew Mae Jan.) were slightly inhibited 39%). Germination of the other two species, Mimosa pigra Linn. and Euphorbia geniculata Ort. were not inhibited but seedlings were injured. Growth of O. sativa Linn. cv Nam Ru, M. invisa Mart., and D. aegyptium (L.) P.B.) were decreasing while the concentrations of croton weed was increasing except growth of D. aegyptum (L.) P.B.) at the lowest concentration which was highter than control, however it was decreased at the higher concentration.