Evaluating clopyralid as a broad leaf herbicide in canola fields of Iran
2006
Shimi, P. (Iranian Plant Protection Research Inst., Tehran (Iran)) | Poorazar, R. (Agricultural Research Center, Zarghan (Iran)) | Jamali, M. (Agricultural Research Center, Khuzestan (Iran)) | Bagherani-Torshiz, N. (Agricultural Research Center, Golestan (Iran))
Efficacy of clopyralid to control weeds of the Umbelliferae, Asteraceae, Papilionaceae, Polygonaceae and Poaceae families was tested in canola fields of Fars, Golestan and Khuzestan Provinces, Iran, during 2005. Treatments included post-emergence application of clopyralid at 0.12, 0.18, and 0.24 kg ha-1 when broadleaf weeds of above families were at 6-leaf stage; pre plant incorporation of trifluralin at 0.96 kg ha-1, trifluralin + clopyralid at times and doses mentioned above and weed-free check. All treatments were sprayed with cycloxidim against grassy weeds (2-6 leaf stage) at the rate of 0.2 kg ha-1. Results showed that 0.24kg of clopyralid could control Malva sylvestris by 76%, Melilotus sp. by 87%, Ammi majus by 90%, Silybum marianum by 94%, Cardauus pycnocephalus by 95% and Polygonum sp. by 94%. Combination of clopyralid with trifluralin did not affect percentage control of above weeds, or much effect on yield.
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