COMMON PLANT DISEASES & INSECT PESTS Below you will find descriptions of some of the most common diseases and insects that harm local plants. If you recognize any on your own plants, please come down to Woodland Gardens and we will show you exactly what you need to get your plants healthy. If you are unsure of what the problem is, bring a few leaves in a ziploc bag down to Woodland Gardens and we can identify the problem and solution for you. We offer a large assortment of disease and insect control, including many organic options. We look forward to helping you and your plants! |
Common Plant Diseases |
POWDERY-MILDEW ATTACKS: ornamentals such as, dogwood, lilac, rose LOOK FOR: powder white substance SYMPTOMS: failed buds TREAT: various fungicides, reduce humidity |
ROSE BLACK SPOT LOOK FOR: black spots on upper sides of leaves, fringed margins on spots SYMPTOMS: yellowing and falling of leaves TREATMENT: avoid overhead watering for prevention, rose fungicides |
RUST ATTACKS: ornamentals, rose, rhododendrons, hollyhock LOOK FOR: rust-colored spore masses SYMPTOMS: if severe infection, plant growth can be stunted |
Common Insect Pests |
SCALE INSECTS LOOK FOR: sweet "honeydew" substance on leaves and stems, may attract ants TREAT: horticultural oils |
SPIDER MITE ATTACKS: vegetables, flowers LOOK FOR: speckled appearance, webbing on plant |
APHIDS ATTACKS: rose LOOK FOR: soft oval bugs in groups SYMPTOMS: rolled leaf edges, puckering leaves, honeydew deposites |
SLUGS ATTACKS: lettuce, flowers, fruits LOOK FOR: slimy, shiny trails on leaves TREAT: various slug killers |
WOOLY ADELGID ATTACKS: hemlock LOOK FOR: dry white wooly substance SYMPTOMS: sap suckers, toxin release, little new growth |