Behavior of different rice seed cultivars to ammonium gluphosinate herbicide

This research aimed to detect the sensitivity of rice varieties to ammonium gluphosinate herbicide. Two assays were conducted based on the germination test of the Varieties: BRS-Chuí, BRS-Taim and BRS-Firmeza. In the first assay moist germination paper with herbicide was used and in the second assay, the seeds were imbibed in a solution containing herbicide. In the first assay, ammonium gluphosinate concentrations: 0,0; 0,4; 0,008; 0,12; 0,16% were tested and in the second, the concentrations were: 0,0; 0,04; 0,08; 0,12; 0,16; 0,2; 0,4; 0,6; 1,0 and 2,0%. The following parameters : germination %; roots and shoots length of normal seedlings and total seedling length were analyzed after 7 and 14 days. It was concluded: a) there is a variation in the cultivar sensitivity to ammonium glufosinate, b) the germination of rice seeds is inhibited when, the concentration of ammonium glufosinate is 0,04% in moist germination paper, or 1,0% when imbibing the seeds in herbicide solution.

Oryza sativa; seeds; herbicide; varieties