"Allelopathic Effects of Euphorbia helioscopia and Papaver rhoeas on Germination and Initial Seedling Growth of Cereal Crops and Weed seeds"

Volume 18 , Issue 1 , March 2016 , Pages 145-152

Authors

¹ Field Crop Department, Faculty of Agriculture sciences, University of Sulaimani, Iraq.

A laboratory study was conducted to investigate the allelopathic effect of aqueous

extracts of fresh roots and leaves of sunspourge and field- poppy weeds on germination

and growth of four different plant species; wheat, barley, wild mustard and seabious

seeds. Maximum stimulation ratio of germination percentage was observed on barley

seeds with sunspourge root extract was 23.46%. Maximum stimulation ratio of wheat

root length was 59.16% with sunspourge leaf extract and was 33.02% for barley with

field poppy root extract, while poppy leaf extract reduced wild mustard and seabious root

length ratio by 37.22% and 29.99% respectively. The highest stimulatory ratio of wheat

shoot length was 10.84% with poppy leaf extract at the same time reduced seabious

shoot length by 18.52%. Maximum increasing of wheat fresh weight was 88.76% with

poppy leaf extract and was 87.94% with sunspourge extract leaf for barley while

sunspourge leaf extract decreased wild mustard fresh weight by 77.64%. The highest

increasing ratio of barley seedling dry weight recorded with sunspourge leaf extract was

32-85%.

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