Pythium Root Rot (Damping-Off, Seed Rot) (Peas) Description: A watery rot is characteristic. Plants are often stunted and light green because of the lack of root development. Solution: Plant as early in the season as possible. Peas are a cool-season crop, while pythium disease is most severe at temperatures from 64°-75°F, which is higher than preferred for pea germination. Sprinkle […]
Iris Borer Description: Eggs overwinter in stems of iris and other debris. After eggs hatch they must crawl to the base of the iris to bore into stems. During this migration they are susceptible to Grub-Away Nematodes. Infested leaves are yellow from the tip back, have notches on the edge; plants lose vigor; many fail to bloom. Solution: Grub-Away Nematodes […]
Pythium Rot (Damping-Off, Stem Rot) on Tomatoes Description: Damping-off occurs at or before germination, causing rapid decline and death of seeds or young seedlings. On older plants, disease causes severe wilting and black stem, beginning at ground level, resulting in severe stunting or death of plants. Solution: Maintain soil pH at 6.5 to 7.0. Test soil pH; if it is […]
Japanese Beetle Description: Metallic green/copper adult grows to 1/2″ long. Larvae or grubs are grayish-white with brown head; fat body is 3/4″ long. Adults especially like beans and corn but will eat almost any plant, often skeletonizing the leaves. Larvae chew on roots of lawn grass, bean, beet, sweet corn, onion and tomato; except during cultivation, they are seldom noticed, […]
Pythium Wilt (Lettuce) Description: Dark yellow-brown roots, stunting, yellow of outer leaves. Root system decline. Solution: Provide good drainage; raised beds are ideal. Sprinkle SoilGard over seed at time of sowing, before covering seed with soil. When starting seed indoors, mix SoilGard with potting soil before seed is sown.
Late Blight (Tomatoes) Description: Late blight can be devastating to fruits, stems and leaves when weather conditions are favorable (long periods of muggy weather with cool nights and moderately warm days). Affected plants look as if they were killed by frost. Both green and ripe fruits become corky brown on their surfaces and develop a texture resembling that of an […]
Rhizoctonia Root Rot (on Beans) Description: Primarily attacks seedlings and young plants. Reddish-brown spots appear on lower stems. Most infected plants die as seedlings. Solution: Shallow seeding depth and planting in thoroughly warm soil helps. Sprinkle SoilGardTM Microbial Fungicide over bean seed at time of sowing, before covering seed with soil.
Mealybug Description: Bodies up to 1/4″ long are covered with white powdery wax. Colonies look like small tufts of cotton along veins on underside of leaves and at base of leaf stems. They infest most houseplants, plus apple, grape, peach, pear trees. Infested fruits are disfigured and covered with dark mold. Mealybugs extract plant juices, causing dwarfing, wilting, and early […]
Mexican Bean Beetle Description: Bean beetle adults are yellow-brown, 1/4″ long, with 16 black spots; they are frequently mistaken for Lady beetles but Lady beetles have a varying number of spots. The larvae are yellow-orange, spined, 1/3″ long. Both adults and larvae prefer beans. They skeletonize leaves and can strip a plant to its stems quickly. Solution: If infestation is […]
Mite and Spider Mite Description: Mites are hardly visible to the eye, but their webbing is the telltale sign of infestation. They feed on most indoor plants, apple and peach trees, evergreens and strawberries, causing yellowing, first along the veins and then over the entire leaf surface. Fruit trees with severe mite damage will have small, poorly colored fruit and […]