Evaluation of controlling effects of alfalfa fields dodder with different amount of rotten wheat straw

In order to control different amounts of rotten wheat straw infested feature dodder alfalfa under field conditions, two separate experiments in crop year 2014-2015, in two different field of Urmia region, with a randomized complete block in four replications were evaluated. Treatments consisted of seven levels straw weighing one, two, three, four and five kg, hand weeding and no control were considered. Different amounts of straw was distributed on whole plots' surface. In each block, one plot for manual control and an infected plot were as control. Test results showed that the effect of different amounts of straw used in alfalfa on some vegetative traits such as stem diameter, stem height, and fresh weight of alfalfa was significant at the 1% level and increase compared was to the control treatment. Results also showed that yield and yield components of meaningful use different amounts rotten wheat straw yield of dry matter and chlorophyll content, is the 1% level. Among the different amounts of straw, 5 kg treatment showed the best results in dry matter yield about 1.8 kg/m2) compared to other treatments. It was found that the use of rotten wheat straw and straw to control the dodder (5 kg per pound) had a good effect.