The evaluation of some herbicide in control of broad leaf weeds in potato field

To consider and determine the best herbiside treatment to control the weeds in potato fields, an experiment accomplished in Damavand byrandom complete block desingn.Dosages of the treatment were Metribozin 750gr/ha, Pendimetalin 3lit/ha and 5lit/ha, Rihmselphoron 60 and 40 lit/ha with 2.5%sitogit, Paraquat 3lit/ha and the witnees was without herbiside. Paraquat 3lit/ha had the most effect on the dried weight of Acroptilon repens(L.)D.C after 15 days. After 30days the most effect of the herbisides were: Pendimetalin 3lit/ha on Amaranthus viridis L Metribozin 750 gr/ha on Amaranthus retroflexus L Rihmselphoron 60 and 40 lit/ha with 2.5%sitogit on Chenopodium album L Rihmselphoron 60 and 40 lit/ha with 2.5%sitogit on convulvolus. The most successful treatment of herbisides after 45 days were: Pendimetalin 3lit/ha on Acroptilon repens(L.)D.C Rihmselphoron 60 and 40 lit/ha with 2.5%sitogit, Paraquat 3lit/ha on Amaranthus retroflexus L and Amaranthus viridis L, Metribozin 750 gr/ha Chenopodium album L, all of herbisides on convolvulus, Rihmselphoron 60 and 40 lit/ha with 2.5%sitogit, Paraquat 3lit/ha on Chrozophora tinctoria (L.)Juss. The maximum yield was for Paraquat 3lit/ha and metribozin 750 gr/ha. The result showed that the best herbiside treatment in Damavand to control the weeds is Metribozin 750 gr/ha.