TY  - PRO
AU  - Díaz de Ackermann,M.
AU  - Ginkel,M.van|McNab,A.|Krupinsky,J.
AU  - Ibañez,V.
AU  - Kohli,M.M.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Septoria tritici resistance of wheat cultivars at different growth stages
SN  - 970-648-035-8
U1  - 632.4 
PY  - 1999///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT
KW  - Disease resistance
KW  - AGROVOC
KW  - Growth period
KW  - Infection
KW  - Plant developmental stages
KW  - Plant diseases
KW  - Septoria
KW  - Triticum
KW  - CIMMYT
N2  - Nine wheat cultivars planted in the greenhouse were inoculated with a mixture of three isolates of Septoria tritici at four different growth stages. The first evaluation, done six weeks after inoculation, showed that the facultative wheats at growth stage (GS) 39 (flag leaf ligule just visible) and spring wheats at GS 65 (flowering halfway complete) reached the highest levels of infection, with two exceptions, cvs E. Pelón 90 and P. Oasis. In the second evaluation a week later, the highest level of infection was reached when facultative wheats were inoculated at GS 32-33 (stem elongation-first node detectable) and spring wheats at GS 39 (flag leaf ligule just visible). In both evaluations, the effects of cultivars, seeding date/GS at inoculation, and the interaction between cultivars and GS at inoculation were significant. Septoria tritici susceptibility increased with the age of the plants. The increase in the level of infection was significantly lower in cv P. Superior (Bobwhite), indicating a certain level of adult plant resistance
ER  -