Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Leaf spotting symptoms

Donald Groth, Louisiana State University AgCenter, Bugwood.org

Rice leaves showing symptoms of leaf blast

Sally Leong, USDA Agricultural Research Service, Bugwood.org

Leaf from resistant rice variety CO39 showing ability to resist formation of lesions when the Magnaporthe grisea strain carries the AVR1-CO39 avirulence gene. The dark spots are areas where plant cells have died to abort rice blast infections.

USDA Agricultural Research Service , Bugwood.org

Lesions on rice plant leaves.

Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

gray fuzzy growth of Pyricularia grisea

Donald Groth, Louisiana State University AgCenter, Bugwood.org

Rice flag leaf collars symptomatic of infection with the rice blast pathogen

Donald Groth, Louisiana State University AgCenter, Bugwood.org

Rice stem nodes symptomatic of infection with rice blast pathogen  

Donald Groth, Louisiana State University AgCenter, Bugwood.org

Rice head showing symptoms of panicle blast infections

Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Close-up of collapsed, newly-seeded tall fescue infected with Pyricularia grisea the cause of Gray leaf spot.

Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org

Close-up of two spots infected with Pyricularia grisea the cause of Gray leaf spot.

D. Settle, Bugwood.org

gray leaf spot (Magnaporthe grisea) symptoms on perennial ryegrass (Lolium perenne)

Ned Tisserat, Colorado State University, Bugwood.org

gray leaf spot (Magnaporthe grisea) symptoms on perennial ryegrass (Lolium perenne)