TY  - PRO
AU  - El Harrak,A.
AU  - Duveiller,E.|Dubin,H.J.|Reeves,J.|McNab,A.
AU  - Mergoum,M.
AU  - Saadaoui,E.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Major foliar diseases of Triticale in Morocco
SN  - 970-648-001-3
U1  - 633.1194 
PY  - 1998///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT|UCL|BADC
KW  - Blights
KW  - Disease resistance
KW  - AGROVOC
KW  - Morocco
KW  - Plant diseases
KW  - Triticales
KW  - Triticum
KW  - CIMMYT
N2  - Triticale (x Triticosecale Wittmack), a new crop in Morocco, is currently attracting more interest from farmers. Though triticale had shown excellent resistance to major diseases and insects under Moroccan conditions in the past, many disease symptoms have recently been observed on several genotypes in breeding nurseries. Therefore, a survey of triticale diseases was conducted during the 1989/90 and 1990/91 crop seasons in different regions of Morocco. The main foliar diseases recorded were tan spot (Pyrenophora tritici- repentis) and spot blotch (Bipolaris sorokiniana). Speckled leaf blotch (Septoria tritici), glume blotch (S. nodorum), leaf rust (P. recondita), and stem rust (P. graminis) were less frequently observed. Another study, including 16 triticale genotypes (three of which had already been released), two bread wheat, and two durum wheat cultivars, was conducted in the greenhouse to determine their reaction to the major cereal pathogens in Morocco. Results showed that genotype reaction ranged from resistant to susceptible for all pathogens except S. tritici and Erysiphe graminis, isolated from wheat, which were not virulent on triticale genotypes. The virulence of B. sorokiniana, P. tritici-repentis, and S. nodorum strains isolated from wheat was relatively higher on triticale. This suggests that selection pressure by triticale may induce variation in pathogenicity of some parasitic fungi of wheat
ER  -