Abstract

LORENA CARDONA, Nadya et al. Microbiological evaluation and pathogenicity of a liquid bioformulation of the fungus Purpureocillium sp. (strain UdeA 0109) on Meloidogyne incognita-javanica stages. Biotecnol Apl [online]. 2014, vol.31, n.3, pp.210-215. ISSN 1027-2852.

The BIOMA research group (Biocontrol and environmental microbiology) has an industrial liquid formulation based on Purpureocillium sp. (UdeA 0109 strain), developed with the collaboration of Laverlam S.A, a Colombian (Cali) commercial house. In the present study the researchers tested the viability and the purity at different storage temperatures as well as its biological potential both in vitro and under greenhouse conditions. The results of viability showed how the infective structures were affected neither by the evaluation time nor by the storage temperatures. Studies also showed that the purity of the bioformulation in the same conditions was over 99 %, and its pathogenicity in vitro with an LC50 of 104 conidia/mL was corroborated. The greenhouse tests showed the ability to produce damages in eggs of the Meloidogyne incognita-javanica complex, and a decreasing of the J2 stages at a concentration of 108 conidia/mL in three tests performed with a different number of applications and at different times each.

Keywords : biocontrol fungus; Purpureocillium sp.; Meloidogyne incognita-javanica.

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