Tasa de infección de la pudrición del tallo en maíz causada por Fusarium moniliforme

Abstract

Infection rate of the stalk rot in maize to Fusarium moniliforme. The objective of this work was to determine the horizontal resistance of 134 S1 lines of maize to Fusarium moniliforme. The lines were evaluated in Mexico during 2002. The disease was induced by inoculation at male flowering time under field conditions using the technique of the thud pick. Assessment of disease data was done twice with a time interval of 20 days. Field evaluations showed that lines 302 and 802 were resistant in the first and second evaluations. Estimated rates of disease increase varied form 0.018 to 0.299 per unit per day. Lines 110, 302, 706, 801, 1104 showed low levels of disease from 19 a 52 % in the first evaluation. In the second evaluation, disease levels ranged from 39 a 79 %. Rates of infection increase for these lines were 0.074, 0.051, 0.043, 0.69, and 0.088, respectively. In a maize breeding program these lines could be utilized to improve F. moniliforme and stalk rot horizontal resistance.