Effect of Different Heat Periods on Fusarium oxysporum f. sp. melonis Survival and Viability

in HortScience
View More View Less
  • 1 Universidad de Colima, Facultad de Ciencias Biológicas y Agropecuarias, Tecomán, Colima, 28100, México
  • | 2 Universidad de Colima, Facultad de Ciencias Biológicas y Agropecuarias, Tecomán, Colima, 28100, México
  • | 3 INIFAP, Campo Experimental Tecomán, Tecomán, Colima, 21800, México
  • | 4 Universidad de Colima, Facultad de Ciencias Biológicas y Agropecuarias, Tecomán, Colima, 28100, México
  • | 5 Universidad de Colima, Facultad de Ciencias Biológicas y Agropecuarias, Tecomán, Colima, 28100, México

Soil solarization is used for soil born pathogens control, as a result of temperature increase in soil, around 10 °C higher than in not solarized soils. In Mexico, is mostly used to decrease cost to control of different diseases that affect to melon crop, one of them is caused by Fusarium oxysporum f. sp. melonis (L & C) Snyder & Hansen, which is characterized by wilt and yellowing in melon plants. The objective of this assay was to evaluate the effect of heat on infective capacity of F. oxysporum f. sp. melonis in melon plants and its reproduction capacity after to be under different periods of heat under laboratory conditions. Isolated was taken from melon plants from Carmelitas Ranch in the Colima Municipality. Inoculation was 1 × 10-6 conidia concentration. Cloth bags, with 20 g of inoculated soil, were introduced at 9 cm depth in metallic pots (16 cm diameter and 18 cm depth) containing 4 kg of not inoculated soil during 24, 48, 72, 96, and 120 h, with 6 replications. After each period, 1 g was taken from the cloth bags used in heat treatments, later was diluted in 50 mL of distillated water, and petri dishes containing PDA, were inoculated with 1 mL from that dilution and inoculum viability was registered at 96 h after incubation. Parameters evaluated were: mycelium growth, propagule number, and conidia number. Results showed a positive effect to control of Fusarium oxysporum f. sp. melonis, in treatments with a higher heat period, respecting to the control. Is necessary to evaluate this technique under field conditions during summer season.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 48 13 0
PDF Downloads 54 17 1