Rust: Development of lesions
Pathogen: Puccinia allii (synonym: P. porri) Symptoms The disease first appears as small, circular, white to tan lesions along leaf...
Rust: Pustules formation on leaves
Pathogen: Puccinia allii (synonym: P. porri) Symptoms Rust brown clusters of spores (pustules) forms all over the leaf. The leaf tissue...
Pink root rot
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms The disease may appear either in young seedlings or later in the...
Pink root rot: Undersized onion bulbs
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms In severe cases the roots may die and the plants become weakened or...
Pink root rot: Roots turn pink or maroon
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms Roots turn pink or maroon when infected.​ Leaf number and size are...
Pink root rot: Reduced size of onion bulb
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms Reduced bulb size. Roots turn pink or maroon when infected.​ Leaf...
Pink root rot: Infected roots of onion
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms Infected roots show a light pink color that become deeper pink or red...
Pink root rot: Roots develop pink color
Pathogen: Phoma terrestris (syn. Pyrenochaeta terrestris) Symptoms Onion roots develop pink color. May occur in seedling stage or mature...
Onion yellow dwarf: Crinkled and flattened leaves
Pathogen: Poty virus Symptoms Leaves are sometimes crinkled and flattened and tend to fall over. Leaves show symptoms ranging from yellow...
Onion yellow dwarf: Yellowing of leaves
Pathogen: Poty virus Symptoms Leaves show symptoms ranging from yellow streaks to complete yellowing of leaves. Leaves are sometimes...