EFFECT OF NITROGEN FERTILIZERS AND OIL ADJUVANTS ON NICOSULFURON EFFICACY

Authors : Robert IDZİAK, Zenon WOZNİCA

Pages : 174-178

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Publication Date : 2013-02-01

Article Type : Research Paper

Abstract :Effect of oil adjuvants and nitrogen fertilizers on weed control with nicosulfuron was investigated at two locations in the years 2006 ± 2008. Treatments included nicosulfuron at 60 g ha-1 without adjuvant and at 30 g ha-1 with or without methylated seed oil insert ignore into journalissuearticles values(MSO); and petroleum insert ignore into journalissuearticles values(PO); and additionally with and without ammonium nitrate insert ignore into journalissuearticles values(AMN);, urea insert ignore into journalissuearticles values(U); or urea ± ammonium nitrate liquid fertilizer insert ignore into journalissuearticles values(UAN);. Reduction of nicosulfuron rate from 60 to 30 g ha-1, except Echinochloa crus-galli,, significantly decreased Chenopodium album, Viola arvensis, Polygonum convolvulus, and Polygonum aviculare control. E. crusgalli control ranged from 93 to 99% regardless of herbicide and adjuvant treatment. However, addition of oil adjuvants, especially MSO strongly increased weed control, especially when used with AMN and UAN nitrogen fertilizers. Reduction of nicosulfuron rate from 60 to 30 g ha-1 strongly reduced grain yield of maize. However, addition of PO and MSO oil adjuvants, especially MSO applied in a mixture with AMN or UAN nitrogen fertilizers completely overcome this effect and allowed to obtain comparable grain yield of maize as obtained after application of recommended nicosulfuron rate insert ignore into journalissuearticles values(60 g ha-1);
Keywords : Methylated seed oil, mineral adjuvant, sulfonylurea herbicide, weed control