Fusarium Wilt (Cucurbits)

Fusarium Wilt (Cucurbits) Description: In young melon, cucumber and watermelon plants: damping-off, stem collapse, and death. In older plants: yellowing, stunting, wilting, and death. The disease is established wherever cucurbits are grown. Solution: Maintain soil pH at 6.5 to 7.0. Test soil pH; if it is too acid, use ground limestone to raise pH. Most garden centers and farm stores […]

Fusarium Root Rot (Peas)

Fusarium Root Rot (Peas) Description: Darkening of stem at soil level, root decline and, as disease progresses, general loss of vigor, stunting, and death of leaves. A serious disease of peas in all areas of the U.S. Solution: Minimize soil compaction and maintain good soil fertility. Alternating with cover crops helps general soil fertility and decreases soil compaction. Sprinkle SoilGardTM […]

Fusarium Wilt on Tomatoes

Fusarium Wilt on Tomatoes Description: The first symptom is yellowing of older leaves, then bright yellowing from top to bottom of plant, often affecting only one branch of plant. Sometimes leaves droop and curve downward. Plants often wilt and die. Solution: Maintain soil pH at 6.5 to 7.0. Test soil pH; if it is too acid, use ground limestone to […]

Flea Beetle

Flea Beetle Description: Black, often with a curved yellow or white stripe on either side of its back. Flea beetles are seldom actually seen; they hop away before you get close enough to see them. They eat nearly all garden crops, and the adults are very troublesome when seedlings are set out. Leaves become riddled with little holes, chewed through […]

Fire Blight (Apples & Pears)

Fire Blight (Apples & Pears) Description: : Can cause severe damage to apple and pear trees. Fire blight usually attacks blossoms, but infection and dieback of new shoots is common (see photo). The downward curled twig tip is characteristic of fire blight. Solution: Cut off infected twigs and branches 12″ below the dead area. Disinfect pruning tool between cuts by […]

European Corn Borer

European Corn Borer Description: White to flesh-colored larvae with brown spots and dark head, up to 1″ long, overwinter in corn stubble. They like all types of corn, especially sweet corn. First signs are “shotgun” holes in the whorl (the funnel-like new growth). Shortly after, borers move into the stalk or ears and frequently leave “sawdust” around borer holes. Broken […]

Early Blight (Potatoes & Tomatoes)

Early Blight (Potatoes & Tomatoes) Description: Problem for potatoes and tomatoes. Irregular brown spots show on lower leaves first. Lower leaves fall off, tomatoes are exposed to sun, causing sunscald. On old plants, it sometimes causes black, sunken spots near the stem end of tomatoes. Solution: Begin applying Soap-Shield® Fungicidal Soap or Copper Dust soon after setting out plants, then […]

Anthracnose (Beans)

Anthracnose (Beans) Description: Fungi live on infected bean seed and in debris that has been left on top of garden soil. Moderate, frequent rainfalls, especially if accompanied by winds, provide perfect conditions for spread of anthracnose. Solution: Plant beans in a different location each year, and purchase disease-free seed each year. Anthracnose is spread quickly and easily when plants are […]

Downy Mildew (Onions)

Downy Mildew (Onions) Description: Spots on the leaves become covered with a lavender or purplish mold. Requires cool temperatures and rain or high humidity. Under these conditions, onion leaves bend, resulting in lower yields and bulb quality. Solution: Grow onions in well-drained soil to keep roots from getting soggy. To prevent the spread of disease, wash tools and shoes after […]

Downy Mildew (Cucurbits)

Downy Mildew (Cucurbits) Description: A period of at least 6 hours at 100% humidity on the leaf surface is required for infection. Downy mildew symptoms vary considerably, plant to plant. Lesions appear first on the oldest leaves and then spread to the younger leaves. Solution: Use plant spacings which reduce canopy density, and avoid overhead watering to help reduce the […]