Kuntze, (1898) Phomopsis obscurans is a common fungus found in strawberry plants, which causes the disease of leaf blight.

Common symptoms caused by the pathogen begin as small circular reddish-purple spots and enlarge to form V-shaped lesions that follow the vasculature of the plant's leaves.

In severe cases where the pathogen has progressed substantially, the stolons, fruit, and petioles of the leaf become infected and may girdle and kill the stem.

[4] Temperature, inoculum density, moisture period, and host tissue maturity all have an effect on the disease development of the inoculated strawberry plant.

Temperature takes a vital role in the infection and development of the blight disease caused by the pathogen, Phomopsis obscurans.

[3] These temperatures are commonly found in the midsummer environment of North Carolina, where leaf blight of strawberries caused by Phomopsis obscurans is especially prevalent.

Ideal moisture exposure is 72 hours, which suggests that it takes the pathogen that long to establish optimal inoculation of the host tissue.