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Armillaria root rot, also known as Oak root fungus, is a disease of many different plants. There is no known effective cure. Root rot fungus disease of trees and woody plants. Affects palms, succulents, ferns and other herbaceous plants like begonia, daffodil, dahlia, and geranium. No…
Seedlings sometimes fail to sprout or die soon after. Seeds may rot before germinating, shoots may decay before they emerge, or stems of seedlings may be attacked near the soil line, causing young plants to collapse. These diseases are collectively called “damping off,” likely caused by a number of soil…
Downy mildews, including Peronospora and Plasmopara spp., are pathogenic water molds (oomycetes) that primarily damage foliage. Hosts include cane berries, roses, various herbaceous ornamentals, and many fruit, grain, and vegetable crops. CategoryFungiSigns/SymptomsDowny mildew causes pale green to…
Winter is the best time to prune roses to set up bountiful blooms later in the year. This annual task is crucial for overall rose health--from stimulating vigorous growth to preventing common fungal diseases. While most modern roses need winter pruning, hold off on varieties like rambling roses,…
Fire blight is a common and frequently destructive disease of pome fruit trees and related plants. The disease can destroy limbs and even entire shrubs or trees. Caused by the bacterium Erwinia amylovora. Pear (Pyrus species) and quince (Cydonia) are extremely susceptible. Apple, crabapple …
Fungus. Various host-specific forms of Fusarium oxysporum can kill infected plants. Hosts include asparagus, bean, cabbage, cantaloupe, pea, tomato, and watermelon. There are many varieties of host plants with resistance to Fusarium wilt.Like verticillium, causes leaf…
Here is a question that came to the gardening advice teamQ: I planted a cover crop in my community garden plot and left it longer than I should have. There are now weeds mixed in with the cover crop blend. I’m not sure what I should do. If there are weeds mixed in with the beneficial plants I’m guessing I…
Spring is finally upon us and the weather has been absolutely gorgeous. All this sunshine & spring showers have me thinking about my vegetable garden. I already have some seeds in the ground, but I want to keep planting more.The other day while strolling through the local garden center my eyes…
Late blight of potato was responsible for the Irish potato famine of the late 1840s. Late blight is caused by the oomycete Phytophthora infestans. Oomycetes are fungus-like organisms also called water molds, but they are not true fungi. CategoryFungiSigns/SymptomsLesions appear as small dark green water…
