This experiment was conducted during 1385-1388 for chemical and mechanical control of swallowort (Cynanchum acutum) in Abyek and Yazd in a random complete block design with 3 replications and 18 treatments using Paraquqt, Triclopyr, Glyphosate, and their combinations together control. The results showed that the best treatment for the control of swallow wort density in Abyek were three times Rounup 6 L/ha and two and three times Garlon 2 L/ha and, and for its dry weight control were previous treatments plus 3 times Rounup 4 L/ha and 2 times Rounup 6 L/ha. The most effective treatments for the control of swallowwort density in Yazd were two and three times Garlon 2 L/ha and three times Rounup 6 L/ha, and the best treatment for the control of swallow wort biomass were previous treatment together Garlon+Rounup. Therefore, systemic herbicide Roundup has more ability in swallow wort control than that of contact herbicides like Paraquat.

another authors reported that DURING 2009 GROWING SEASON, AN EXPERIMENT WAS CONDUCTED AT A PISTACHIO ORCHARD IN ARAN & BIDGOL (ESFEHAN PROVINCE, IRAN) TO EVALUATE THE EFFICACY OF SOME SYSTEMIC HERBICIDES FOR CONTROLLING THE PERENNIAL WEED CYNACHUM ACUTUM. TREATMENTS CONSISTED OF THE APPLICATION OF GLYPHOSATE OR TRICLOPYRASTER, ALONE OR TANK MIXED WITH AMMONIUM SULFATE, AND NICOSULFURON. ALL TREATMENTS, COMPARED WITH CONTROL, SIGNIFICANTLY REDUCED THE GROWTH, DRY WEIGHT AND NUMBER OF C. ACUTUM PLANTS. AMONG THE TREATMENTS, APPLICATION OF GLYPHOSATE AT 3.28 KG AE HA-1 PLUS 4% AMMONIUM SULFATE WAS MORE EFFECTIVE THAN THE OTHERS IN CONTROL OF THE WEED.

Dear Sir Hassan.

Thanks for your answer. But we cannot use herbicides in that garden, because of narrow distance between the weed (C. acutum) and the pistacia trees.

As i know, the name swallowort is a common name of Chelidonium majus and doesn't use for C. acutum. One of the common names of C. acutum is "Kudzu".