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 […]

Damping-Off (Lettuce)

Damping-Off (Lettuce) Description: Seed decay, sudden wilting of seedlings, loss of vigor. Favored by high moisture level and poorly drained soils. Damping-off disease occurs wherever lettuce is grown. Solution: Minimize soil compaction and plant in well-drained soil. Alternating with cover crops helps general soil fertility and decreases soil compaction. Sprinkle SoilGardTM Microbial Fungicide over seed at time of sowing, before […]

Cutworm

Cutworm Description: Gray or brown caterpillar curls up when disturbed; rarely seen during the day; 1-2″ long, fat body. Black and variegated cutworms are the most destructive and widespread. They eat all garden vegetables, especially tender young seedlings and transplants. While some cutworms eat leaves, the telltale sign of their presence is a plant which has been “sawed off” near […]

Cucumber Beetle

Cucumber Beetle Description: The spotted cucumber beetle is notorious for spreading cucumber bacterial wilt. Body is 1/4″ long, yellowish-green with 12 distinct black spots on its wings. Larvae grow to 1/2″ long. The striped cucumber beetle is 1/5″ long with yellow-and-black striped wings. Preferred foods: cucumbers, beans, melons, squash, pumpkins, corn and eggplant. Beetles lay their eggs in the ground […]

Common Bacterial Blight (Beans)

Common Bacterial Blight (Beans) Description: During periods of warm, humid weather, bacterial blight can be especially harmful to pods. Overwintering occurs in infested plant debris. Solution: After harvest, thoroughly till crop residue into soil. Rotate crops. Spray Soap-Shield® Fungicidal Soap before disease normally appears. Continue applications as long as weather conditions are favorable to the disease.    

Colorado Potato Beetle

Colorado Potato Beetle Description: Adult beetle has a yellow body with black stripes running downward. Red larva grows to 3/5″ long with rows of black spots along its sides. Favorite foods are potato, eggplant, pepper and tomato. Adults and larvae feed on leaves and stems, often stripping entire plants. Small garden plantings seem to be particularly vulnerable to damage. Solution: […]

Codling Moth

Codling Moth Description: Adult moth has 1/2″ to 3/4″ wingspan. Back part of tips of front wings have large chocolate-brown patches; remainder is covered with wavy, light grey and brown lines. Larvae are white/pink; grow to 3/4″ long. The moths prefer apples, pears, crabapples, walnuts and peaches. Larvae bore straight into the center of the fruit to feed on the […]

Cedar-Apple Rust

Cedar-Apple Rust Description: Bright orange spots on leaves and fruit. Generally weakens tree. Fungi that cause cedar-apple rust complete part of their life cycle on red cedar trees where in spring they cause large, bright orange, sticky lesions at the end of branches. Solution: Cedar-apple rust can be reduced by removing nearby eastern red cedar trees. Apply Soap-Shield® Fungicidal Soap […]

Angular Leaf Spot (Cucurbits)

Angular Leaf Spot (Cucurbits) Description: Angular to irregular water-soaked spots form in the leaves. When moist, droplets of bacteria ooze from the underside of lesions and dry to a white residue. The lesions later turn gray to brown, dry, and tear away, leaving large irregular holes. The bacterium overwinters in diseased plant refuse and on the seed coat. Disease is […]