Effect of treatment by Carboxin Thiram fungicide and Imidacoloroprid pesticide on some indicators of seed germination and vigor of maize (Zea mays L.) single cross hybrid704

This study was conducted to evaluate the effect of treatment by Carboxin Thiram fungicide and Imidacoloropride pesticide on storability and some indicators of seed germination and vigor of maize single cross hybrid 704 in laboratory of department of agriculture at Islamic Azad University in Karaj. Seeds were prepared from Kermanshah Agriculture and Natural Resources Research Centre. Seeds were treated by pesticide, imidacloprid in two rates, 3 and 6 g per kg of seed, fungicide Carboxin Thiram in the 2 and 2.5 per thousand, and combined 3 g Gaucho + 2 per thousand Carboxin Thiraman and non- seed treatment were as a control. Treated seed and control seed stored at room temperature (25°c) 3 months. Then standard germination test was conducted and final germination percentage (FGP) was evaluated, normal seedling percentage and some related traits of seed vigor including seedling length, primary root and shoot length, root and shoot dry weight, seedling dry weight, seedling length and weight vigor indices were measured and the experiment was conducted as completely randomized design with 4 replications. The results showed that highest percentage of seed germination was related to treatments of imidacloprid 6 g and the lowest percentage of seed germination was related to control (non- seed treatment), the highest and lowest meantime of germination and control respectively Carboxin Thiram was 2 per thousand. The highest, the lowest weight and seedling vigor index of 2 per thousand treated by imidacloprid 6 grams and Carboxin Thiram. Therefore it can be concluded that seed sterilization as a method to prevent accelerated aging, is disinfectant to maintain and improve seed quality.