Seleção De Isolados De Trichoderma Spp. Na Promoção De Crescimento De Mudas Do Feijoeiro Cv. Carioca E Controle De Sclerotinia Sclerotiorum

Abstract

O objetivo deste trabalho foi selecionar isolados de Trichoderma spp. visando à sobrevivência de mudas de feijoeiro (Phaseolus vulgaris L.) cv. carioca na presença de Sclerotinia sclerotiorum (Lib.) De Bary, bem como a promoção de crescimento desse cultivo. No experimento ex vitro, visando à sobrevivência de plantas de feijão, foram utilizados quatro tratamentos (presença dos isolados IT2, IT3 e IT4 de Trichoderma viride + controle sem Trichoderma spp.) em substrato Plantmax® inoculado com S. sclerotiorum. O experimento da promoção do crescimento de plantas de feijão foi conduzido na ausência e presença de pó biológico da mistura dos três isolados de T. viride (IT2, IT3 e IT4) em substrato esterilizado e não esterilizado, totalizando quatro tratamentos. Nos dois estudos, os trata-47-58, 2012/13 respectively). The misture of the three isolates of T. viride promoted the highest plants, either using sterilized substrate or not (23,69 cm and 20,42 cm, respectively) if compared to the treatments without isolates (13,78 cm and 16,375 cm, respectively). In the presence of biological powder the avarages of dry mass were higher (6,42 and 6,579 g) and different from the sterilized substrate without biological powder (3,98 g). We conclude that the isolates tested T. viride are effective in controlling S. sclerotiorum, presenting higher percentages of bean plants survivors. The mixture of isolates also promotes the growth of seedlings of bean cv. Carioca.

Efficiency of inoculation by Bacillus subtilis on soybean biomass and productivity

“…B. subtilis species produce phytohormones during their development, which also stimulate root growth as verified by Araújo et al (2005) on soybean. The growth promotion caused by soil microorganisms occurs due to the action of several factors still unclear, which may involve plant hormones production, vitamins synthesis or conversion of useful materials for plants, mineral absorption and translocation, and pathogen control (Aguiar et al, 2013).…”

Growth promotion mediated by endophytic fungi in cloned seedlings of Eucalyptus grandis x Eucalyptus urophylla hybrids

“…have been shown to induce growth and control Sclerotinia sclerotiorum in seedlings of the bean plant cv. Carioca grown in nurseries (Aguiar et al, 2012). However, in seedlings of Eucalyptus benthamii, it was indicated that this fungus shows antagonistic potential for the biological control of Botrytis cinerea (Sbravatti Júnior et al, 2013).…”

Trichoderma spp. isolates with potential of phosphate solubilization and growth promotion in cherry tomato1

“…x 10 7 spores mL -1 % Trichoderma "F" (Table 2), however, just "R" was higher than the control. A study conducted by Aguiar et al (2013) demonstrated that the presence of Trichoderma spp. allowed a greater accumulation of shoot fresh mass in bean plants.…”