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Idesia (Arica)

versión On-line ISSN 0718-3429

Resumen

DA COSTA CRUZ, Sandra Maria; COSTA RODRIGUES, Antônia Alice; BARBOSA COELHO, Rildo Sartori  y  SILVA SARDINHA, Diogo Herison. Inductor action on the resistance of tomato plant to Fusarium oxysporum f. sp. Lycopersici, causal agent of fusariosis, and effect on mycelial growth of the fungi. Idesia [online]. 2011, vol.29, n.2, pp.111-118. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292011000200015.

ABSTRACT The inductors of resistance are compounds that induce the synthesis of PR - Proteins, as well as other defense responses of a plant. Searching for an alternative for control of fusarium wilt on tomato plants (Lycopersicon esculentum), we evaluated the inductors Acibenzolar-S-Metil (ASM) (5.0g i.a/L of water), Ecolife (5ml/L of water), Biopirol (2ml/L of water) and Nim oil ( 15ml/L of water); applied in different seasons.  We used plants of cultivars Caline IPA-6, highly susceptible and IPA-6, susceptible to Fusarium oxysporum f. sp. lycopersici. The inductors of resistance were applied to the leaves 5, 10 and 15 days before the inoculation of plants. Thirty days after the seeding the plants were inoculated with 20 ml of suspension of 1 x 10 conidium/ml of the fungus. The evaluation was performed 21 days after the inoculation using a scale of scores of 1 to 5. A significant difference was observed between the inductors and the control on the two tested cultivars.  For cultivar IPA 6 the inductors ASM and Biopirol applied  5, 10 and 15 days before the inoculation presented 72.23% of the control of fusariosis; for cultivar Caline IPA6 the inductors ASM and oil of Nim 5 days before the inoculation and the inductor Biopirol 5 and 10 days before the inoculation gave 75% of the control tomato plant fusariosis.  ASM, the Biopirol and neem oil did not inhibit mycelial growth; no significant difference between these treatments and the control were found. Ecolife40 significantly inhibited mycelial growth ''in vitro''; this was considered to be the best treatment.

Palabras clave : Inductors of resistance; Control; Tomato fusariosis.

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