Iris Yellow Spot Virus(IYSV) disease : Green island tissue appearance
Pathogen : Tomato Spotted Wilt Virus (Tospo virus group) Symptoms Green islands of tissue can appear within a necrotic IYSV lesion. These...
Iris Yellow Spot Virus(IYSV) disease : Infected flower stalk
Pathogen: Tomato Spotted Wilt Virus (Tospo virus group) Symptoms First appear as straw-coloured, dry, tan, spindle or diamond-shaped...
Iris Yellow Spot Virus(IYSV) disease : Progression of the infection
Pathogen: Tomato Spotted Wilt Virus (Tospo virus group) Symptoms As the IYSV disease progresses, concentric rings may, or may not, be...
Iris Yellow Spot Virus(IYSV) disease : Necrotic diamond-shaped lesion on leaves
Pathogen: Tomato Spotted Wilt Virus (Tospo virus group) Symptoms Appearance of necrotic diamond-shaped lesion. These lesions can be small...
Iris Yellow Spot Virus(IYSV) disease : Coalesced lesions on onion leaf
Pathogen: Tomato Spotted Wilt Virus (Tospo virus group) Symptoms Lesions can coalesce making unusual, irregular shaped, larger lesions...
Iris Yellow Spot Virus(IYSV) disease
Pathogen: Tomato Spotted Wilt Virus (Tospo virus group) Symptoms Lesions on onion leaves often appear more elongated than wide and are...
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...
Onion yellow dwarf: Stunting of plants
Pathogen: Poty virus Symptoms Severe stunting of plants, dwarfing and twisting of flower stalks. Leaves are sometimes crinkled and...
Onion yellow dwarf: Bending of leaves
Pathogen: Poty virus Symptoms The affected leaves and stems change their normal green colour to various degrees of yellow and leaves tend...