Qualidade de sementes de feijão tratadas com trichoderma asperilloides em suspensão e sólido

Abstract

Seed treatment is a way of protecting the seed in the initial stages, in order to guarantee uniformity of germination and stand, in addition to being low cost for the farmer. Therefore, the present work aimed to evaluate the effect of different doses and forms of application of Trichoderma aspelloides on the physiological quality of seeds of common beans cultivars. The experiment was carried out in the Agroecology laboratory of the Federal University of Fronteira Sul, Campus Erechim, with two bean cultivars: IPR Siriri (Rio beans) and IPR Tiziu (black beans). Trichoderma asperelloides was tested in the following situations: T0 – control, 0 g/ha; T2 – 5 g/ha in dry powder; T3 – 5 g/ha in suspension; T4 – 10 g/ha in dry powder; T5 – 10 g/ha in suspension. The seed quality tests carried out were: germination and first count, germination speed index (IVG), seedling length and dry mass (aerial part, root and total) and cold test. The two cultivars showed similar performance in the germination test in both forms of application, dry powder and suspension, in relation to the control. In the IVG test there was only an effect of cultivar, with IPR Siriri being more vigorous. Under cold stress conditions, the use of T. asperelloides did not contribute to increasing the germination percentage of IPR Siriri, but IPR Tiziu responded positively to T3 and T4. T4 stimulated the growth of the aerial part of the seedlings, the other parameters of length and weight were not influenced by the use of T. asperelloides. Therefore, under the conditions evaluated, the doses and forms of application of Trichoderma asperelloides do not improve the germination and vigor rates in bean seeds.