Inoculação de sementes de milho utilizando o Trichoderma harzianum como promotor de crescimento

Abstract

RESUMOConduziu-se este trabalho com o objetivo de estudar o efeito do fungo Trichoderma harzianum como promotor de crescimento de sementes de milho tratadas com diferentes fungicidas. O experimento foi realizado em vasos em casa-devegetação, adotando o delineamento experimental inteiramente casualizado em esquema fatorial (3x2), utilizando os tratamentos com fungicidas: Captan®, Maxim® e testemunha e inoculação (com e sem inóculo) em quatro repetições. As características agronômicas avaliadas foram: altura de planta, peso da matéria seca da parte aérea e de raízes e também a técnica de isolamento do fungo nas raízes aos 45 dias após semeadura. Observou-se diferença significativa somente para o fator inóculo na característica peso de matéria seca de raízes. Pelos resultados obtidos, verificou-se que o fungo Trichoderma harzianum estimulou maior acúmulo de matéria seca nas raízes das plantas de milho e também estava presente nas raízes das plantas oriundas de sementes inoculadas, independentemente do tratamento fungicida das sementes. Termos para indexação:Trichoderma harzianum, promotor, crescimento, milho. ABSTRACTThe objective of this work was to study the effect of the fungus Trichoderma harzianum as a growth promoter on the corn seeds treated with different fungicides. This experiment was carried out in pots in a greenhouse by adopting the experimental completely randomized design in (3 X 2) factorial scheme, by utilizing the treatments with fungicides: Captan®, Maximim® and control and inoculation (with and without an inoculum) with four replicates. The agronomic characteristics evaluated were: plant height, shoot and root dry matter weight and also the inoculum isolation technique on the rots after sowing. Significant differences were found only for the factor inoculum in the characteristic root dry matter weight. The results obtained revealed that the fungus Trichoderma harzianum stimulated greatest dry matter accumulation in the roots of corn plants and also it was present in the roots of plants from inoculated seeds regardless of the treatment of the seeds with fungicides.

Trichoderma spp no biocontrole de cylindrocladium candelabrum em mudas de eucalyptus saligna

“…Na Tabela 2, observa-se que o crescimento (cm) de C. candelabrum, quando confrontado com os bioprotetores, foi inferior estatisticamente ao crescimento da testemunha, em que não houve confronto. Em estudo realizado por Martins-Córder e Melo (1998) (MELO, 1996) e plantas de milho (RESENDE et al, 2004). Respostas à aplicação de Trichoderma spp.…”

Biodiversity of Trichoderma in Neotropics

“…Since agriculture is a vital segment of local economies in the neotropics, most research in this region on Trichoderma has been directed to their biological control activities against phytopathogens. Studies have focused on biological control of plant pathogens with economical importance in cacao plantations, orchards, coffee, beans, cotton, flowers and rubber tree plantations, (Castro, 1996, Carsolio et al, 1994Hoyos-Carvajal et al, 2008;Rivas & Pavone, 2010;Samuels et al, 2000, to control the symbiotic fungus of the leaf-cutting ant Atta cephalotes (López & Orduz, 2003), as well as to study the ability of Trichoderma to improve plant vigour and stimulate crop growth (Bae et al, 2009, Hoyos-Carvajal et al, 2009b, Resende et al, 2004. Our knowledge of the distribution of Trichoderma species is constantly evolving in the context of current advances toward resolving the taxonomy of the genus.…”

Efficiency of the inoculation of Trichoderma asperellum UFT-201 in cowpea production components under growth conditions in field

“…Further research has shown that seeds treated with Trichoderma have played an important role in increasing the biomass of plants such as papaya, tomato (Gravel et al, 2007;Tavares, 2009;Fontenelle et al, 2011), corn (Resende, 2004), eucalyptus (Fortes et al, 2007;Filho et al, 2008), chickpeas (Srivastava et al, 2008), beans (Hoyos-Carvajal et al, 2009) and rice (Almança, 2005).…”