Investigating the effect of aqueous extracts of sunn hemp (Crotalaria juncea) and oats (Avena sativa L.) on the germination of wild mustard weed (Sinapis arvensis)

Allelopathy is one of the biocompatible methods to reduce the germination and establishment of weeds.In order to investigate the effect of sunn hemp extract (Crotalaria juncea) extract and oats (Avena sativa L.) on the germination of wild mustard (Sinapis arvensis), an experiment was conducted in 2022 at the Faculty of Agriculture and Natural Resources of University of Mohaghegh Ardabili University. The experiment was conducted as a factorial based on completely randomized design with three replications. The experimental treatments included the type of extract and their concentrations of zero (distilled water), 1, 5, 10, 15, and 20%. The results showed that the percentage of wild mustard seed germination and its growth components of wild mustard seeds were significantly affected by the interaction of extract type and their concentrations. The lowest percentage of germination and growth components such as plumule length, radicle length, germination speed, mean germination time, and seed germination were obtained from the concentrations of 15 and 20% of the extracts. Also, the results showed that sunn hemp extract had more inhibition on germination percentage and growth components of wild mustard seeds than oat extract. It can be concluded that with the increase in the concentration of the extracts, the inhibition of germination and the establishment power of wild mustard decreased in laboratory conditions.