Under moist conditions, the bacterium produces an exudate that, when dry, appears as a whitish, scaly film. The pathogen not only infects the foliage but also can invade the vascular system of the plant, causing decline. Important commercial cultivars have not been found to exhibit resistance to angular leaf spot. Antibiotics are applied for the control of this disease. Leather Rot Leather or crown rot occurs in most temperate regions of the world on a wide variety of plants.
Infection is favored by warm, wet weather and poorly drained soil.
The fungus attacks berries in the field at all stages of growth. Fruit rot occurs when the berries come in contact with the soil. The pathogen may also cause a serious crown rot, which can develop along with the fruit rot. Symptoms and Disease Cycle Crown rot is caused by the soil-inhabiting fungus Phytophthora cactorum . The pathogen infects the roots of the strawberry through wounds in the root tissue.