PRODUCCIÓN MASIVA DE Trichoderma harzianum Rifai EN DIFERENTES SUSTRATOS ORGÁNICOS

Abstract

One of the substrates used to reproduce Trichoderma spp., it is the rice grain of, which has relatively high cost. With the purpose of finding an organic, economic and available substrate in the region, in the one which this fungus has a good development and a high production of viable spores, this investigation has as objectives to evaluate 15 organic substrates in the massive reproduction and viability of spores from T. harzianum, and to associate it with the nutrimental composition of the evaluated substrate. Husk tomato (flower calyx); rice (flower glumes, lemma and palea); garlic (coriaceous cataphyllary); cocoa (seed coat); sesame (fruit pericarp); peanut (fruit pericarp); coffee (fruit pericarp); bean sheath (fruit pericarp); corn cob (feminine inflorescence rachis); grains of rice, sorghum, bird seed and corn; soybean and corn stubble were evaluated. A randomized complete block design with eight replications design was used. It was quantified the number and viability percentage of the spores and it was correlated with the proximal chemical analysis. The corn cob is the best substrate as much in the production as in the spores germination of T. harzianum with 4.43 x 108 ml-1 and 99.0 % of viability. In base with the proximal chemical analysis, the mycelium development, esporulated and spores viability, T. harzianum has a good production in those organic substrates that have high humidity percentage, low content of minerals, protein and fat, and an intermediate fiber percentage.