Study the allelopathic potential of wild barley (Hordeum spontaneum Koch.)‎ as an integrated weed management (IWM)‎ tool

الملخص EN

A randomized complete block design (RCBD) field experiment was conducted on Grdarasha agriculture experimental station fields, college of Agriculture, Salahaddin University, during agricultural growing season 2014-2015 to study the effect of spraying of two post emergence herbicides Nominee (Bispyribac Sodium 10% W/V, 300 ml.

ha-1), and Bonanza 10g granular (Trifluralin10%, 50 g.ha-1) with aqueous extracts of Wild barley (Hordeum spontaneum Koch.) at the rate (200 g.L-1) on growth and yield of two crop species durum wheat (Triticum durum L.) and two-rowed barley (Hordeum distichum L.).

Zero weed (weed free) and weedy check plots were included for comparison.

Treatments caused significant effects on Photosynthetic pigment, Flag leaf area (cm2), Plant Height (cm), Number of tillers.m-2, Number of spikes (m2), Number of grains.spike-1, Weight of 1000 grain (g), Grain yield (ton.ha-1), Straw yield (ton.ha-1), Biological yield (ton.ha-1), Harvest index (HI %), Weed index (WI %).

Results showed significant differences between all treatments, minimum grain yield was recorded in Bonanza herbicide comparing to other treatments and maximum grain yield was registered with weed free treatments, highest level of chlorophyll content was recorded with weedy check and weed free plots while lowest level of chlorophyll content was recorded in plots treated with Bonanza herbicide.