In late summer or fall, Cercospora fungus causes brown spots on hydrangea leaves. The plant looks unsightly but usually recovers from the disease. Drip irrigation, good air circulation, and removal of ...

Gray leaf spot of corn is caused by the fungus Cercospora zeae-maydis. The fungus is now widespread in Indiana and the Eastern Corn Belt (Midwest). Weather strongly influences development of gray leaf ...

A: That’s the fungus gray leaf spot. It most commonly follows application of nitrogen during the hot summer weather. It is a disease that can be controlled by application of either Daconil or ...

Black spots on tomato leaves are usually caused by fungal diseases like Septoria leaf spot or early blight, which thrive in warm, humid weather and can reduce yields or kill plants if untreated. Treat ...

The calls started in early August, from homeowners and arborists concerned about what they were seeing on lilac hedges — yellow and dried-up brown leaves and dying branches on mature plants that had ...

Fall may be in the air, but gardening season is still happening, and you may have questions. For answers, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s ...

With the recent rain and pop up thunderstorms, gray leaf spot and other diseases have been flourishing in the area. Japanese Beetles (June Beetles) have also gone to town on our ornamentals, eating up ...

Between pop up thunderstorms, people going on vacation and people just not mowing enough, gray leaf spot has exploded on St. Augustine grass. I am seeing gray leaf spot on Zoysia as well. Gray leaf ...

Agricultural Research Service scientists are leaving no stone—or rather, leaf—unturned in their search for new ways to counter the fungus that causes tar spot, a yield-robbing disease of field corn in ...

Question: I've had many rose bushes for years. They look great during the year, but every summer I begin to see black spots developing on all of them. By mid- to late summer most of the leaves have ...