evaluating the allopathic effects hoary cress (cardaria draba) organs extrate on germination and seedling growth of triticale

allelopathy is the main factor of weed interference on growth and development of crops. in order to study of allopathic effect of hoery cress organs extrate on germination and seedling growth of triticale, two separate factorial experiment based on randomized complete block design with four replication were conducted under laboratory and green house conditions. treatment were included of extract organs of hoary cress root, stem, leaves and equal amount of their mixture at concentration, 10, 20, 40 and 80 % with control (distilled water) result showed that different organs extrate at performed concentrations in both laboratory and green house conditions had significant effects on germination and early seedling growth compare with control. in laboratory experiment, the length of plumule and number of seminal roots compare with control were decreased of about 88% and 74%, respectively. the same result was observed. when concentration of different organs increase above index decrease significantly. also compare different hoery cress aqueous extract showed that stem extrat had more inhibitory effect on germination and seedling growth.