Phomopsis is a genus of ascomycete fungi in the family Diaporthaceae.

Usually, infections begin during early growth stages in spring.

This affects leaves, fruit, rachises, and shoots of a plant.

This disease causes the formation of lesions on shoots, leaves, and rachises, but also can cause fruit rot.

Another Phomopsis species, P. juniperovora, infects junipers, and is a particularly important pest of seedlings and juvenile plants in the nursery industry.