Physiological Quality of Pigeonpea Seed after Application of Desiccant Herbicides

• 作者: Alessandro Guerra da Silva André José Campos Gisele Carneiro da Silva Itamar Rosa Teixeira Ivano Alessandro Devilla Paulo César Timossi Raniele Tadeu Guimar?es
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: CAJANUS cajan (L.) Millsp. Pre-Harvest DESICCATION Deterioration Maturity VIGOR
• 年，卷（期）: 2015,（6）
• 页码范围: 826-832
• 页数: 7页
• 分类号: R73

摘要

The pre-harvest application of herbicides may impair seed quality. This way, this paper was conducted to evaluate the effects of the application of desiccant herbicides on the physiological quality of pigeonpea seeds. Six batches of seeds from plants desiccated with glyphosate were evaluated at doses: 1.125 (B1), 1.5 (B2) and 1.875 L&middotha-1 (B3);and Gramocil (20% Paraquat + 10% Diurom) at doses: 1.5 (B4) and 2 L&middotha-1 (B5), and a control which received no application (B6). Seed viability was assessed through the germination standard test, and vigor through the first germination count, accelerated aging, electrical conductivity, seedling length, seedling dry matter and biomass density tests. The experimental design was the completely randomized, with four replications. Data were submitted to variance analysis, and when significant effects were observed, the Scott- Knott test was carried out at 5% probability using the SISVAR 5.1 software. The results showed that: a) the application of 1.875 L&middotha-1 of glyphosate was harmful to pigeonpea seed viability and vigor, evaluated through the accelerated aging test;b) applications of glyphosate in a 1.875 L&middotha-1 dose and Gramocil in 2 L&middotha-1 resulted in low vigor according to the electrical conductivity test of seeds;and c) the seed vigor measured by the first count, seedling length, seedling dry matter and biomass density test was not influenced by the type of desiccant applied.