Leaves have a raised net-like russetting on upper surface

Jostaberry Leaf Netting

Leaf netting symptom on Josta, a hybrid of black currants x gooseberry.

• Causal organism: unknown; probably a physiological disorder
• Crops affected: R. x nidigrolaria, hybrids between black currants and gooseberries

Jostaberry leaf netting has been observed in the cultivar 'Josta', a black currant by gooseberry hybrid (Ribes x nidigrolaria Bauer). This symptom appears in the spring and may be somewhat transient in the summer. It may occur to a lesser extent in other Ribes species. Transmission of this disease is unknown.