Powdery Mildew

Powdery Mildew

While most fungi thrive in moist surroundings, the organisms causing powdery mildew flourish in dry conditions; they also prefer warm days, cool nights, and shade. The various members of the group attack different hosts and survive from year to year on perennial plants.

Peach Leaf Curl

Peach Leaf Curl

Most active during cool, rainy springs, this fungal disease slowly weakens infected trees. If left unchecked, afflicted leaves show a coating of white spores; these can reinfect the host tree the following year. Target: Peach, nectarine. Damage: Midribs thicken, causing the leaves to pucker and curl, leaves are tinged with red or yellow and drop … Read more

Mummy Berry

Mummy Berry

Mummies are just the beginning of infection. The mummies are only part of what takes place. The fungus overwinters in these infected berries that have fallen to the ground. In the spring, these mummies ‘sprout’ small, mushroom looking structures, with little cups on the end. These are called apothecia, and they produce tons of spores. … Read more

Mosaic Viruses

Mosaic Viruses

This virus infects more than 150 types of plants, including many fruits, vegetables, and flowers. It is characterized by leaves mottled with yellow, white, and light and dark green spots or streaks. Some of the most commonly infected plants include tomatoes, potatoes, squash, and cucumbers. But will infect others. Depending on environmental conditions, mosaic symptoms … Read more

Leaf Spot

Leaf Spot

Leaf Spot is a common descriptive term applied to a number of diseases affecting the foliage of ornamental and shade trees. The majority of the leaf spots are caused by a variety of fungal pathogens but some are caused by bacteria. Anthracnose is a term for a group of loosely related fungal diseases that often … Read more

Dollar Spot (on Lawns)

Dollar Spot (on Lawns)

Disease of turf grasses caused by the fungus Sclerotinia homeocarpa, attacks most warm season turf grasses . Bentgrass, hybrid bermudagrasses and zoysia are most susceptible to dollar spot. The disease occurs from spring through fall, and is most active during moist periods of warm days (70-85°F) and cool nights (60°F) in the spring, early summer … Read more

Anthracnose (on Lawns)

Anthracnose (on Lawns)

Attacks any turf grass, but primarily bluegrass and centipede grass in the summer and fall. Causes irregular sized tan, brown or reddish-brown patches of grass ranging in size from several inches to several yards. Can kill turf if left untreated. Anthracnose appears in the lawn as irregular patches of brown grass, 2 to 12 inches … Read more

Brown Patch

Brown Patch

Brown Patch, also known as Rhizoctonia solani or Rhizoctonia Blight, attacks lawn grass during the early summer. It causes small (silver dollar sized) spots of tan/brown on most lawn types. These spots can eventually merge to infect large areas. Large brown-patch thrives best during hot, humid nights. It makes its appearance in circular, smoky-looking spots … Read more

Damping-Off

Damping-Off

Present in almost all soils, the various organisms referred to as damping-off fungi can kill seedlings sometimes even before they emerge, and rot potato seed pieces. Healthy seedlings resist infection, though, and plants generally become less vulnerable with age. Over-watering and poor air circulation foster the growth of damping-off fungi, and plants are more susceptible … Read more

Cercospora, Leaf Spot

Cercospora, Leaf Spot

Circular brown spots begin occurring on the older, lower leaves in late June and July. The leaves begin to turn bright yellow, orange or red with dark small spots and fall off the tree. As the summer progresses, many infected trees will have dropped all but their newest leaves. Fungicide treatments should be started in … Read more