Induction of tolerance to Globodera spp. with growth-promoting microorganisms in potato culture (Solanum tuberosum subsp. tuberosum)

Abstract

The effect of induction of tolerance to the attack of Globodera spp. was evaluated from the use of three fungi (Trichoderma, Pochonia and Pleurotus) and one bacteria (Bacillus), as growth promoters microorganisms (PGPR) in developing potato variety Desirée under greenhouse conditions. Cysts were extracted from the infested soil, from the Municipality of Pocona, 25 cysts were infested in each pot during planting, after 30 days the microorganisms promoting PGPR growth, strains from FCAyP, were inoculated. The investigation was carried out under a completely random design, with 15 treatments and two witnesses (absolute witness and nematode witness), with 8 repetitions. The evaluations were carried out at 70 days, considering the physiological variables: fresh weight of the foliage, and fresh weight of the root, and at 90 days to the harvest the Nematological variables (final population), variables Agronomics (number of tubers and yield) and analysis of mesofauna (population of piglets and mites) was determined. The application of growth-promote microorganisms PGPR helped to induce tolerance to the Globodera spp. attack and also on the plant's physiology, which manifested itself in the yield of the crop, with two fungi (Pochonia and Pleurotus) combined, act synergistically helping the plant tole the nematode attack, increasing the yield, even if attacked by the pest.

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