Comparative pathogenesis and mating type of Moroccan isolates of Pyricularia grisea (Magnaporthe grisea) from rice and Stenotaphrum secundatum

Moroccan isolates of Pyricularia grisea (Magnaporthe grisea) from Orzya sat iva and Stenotaphrum secundatum were crossed with standard fertile isolates (mating type Mat 1.1 and Mat 1.2) by using the three-points culture method on oatmeal agar. Only Mat 1.1 isolates from rice were identified and consi dered to have only the ability to function as males, whereas no isolate fro m S. secundatum mated with Mat 1.1 or Mat 1.2. Cross-inoculation studies us ing Pyricularia grisea (M. grisea) isolates from Oryza sativa and S. secund atum show that rice varieties cultivated in Morocco were susceptible to iso lates originating from S. secundatum. Similarly, S. secundatum was suscepti ble to some isolates from O. sativa.