Choose plant varieties that are resistant to angular leaf spot and Initial symptoms of disease are small dark water-soaked spots on the leaves which turn beige to white in dry conditions; lesions develop thin brown borders and the centers may become brittle and crack; small white spots may erupt on the surface of infected butternut and acorn squash and pumpkin fruit. Subsequently, these spots are browning and growing with time, and the tissue becomes dried and perforated. When you find pumpkin pests, carefully cut the stem lengthwise and remove the caterpillar from the vine borer or use a toothpick or other skewer to pierce the stem and penetrate the vine borer. Pumpkin downy mildew caused by Pseudoperonospora cubensis. Pumpkins are very prone to pests and diseases, and numbers of pest and diseases attacks on its crop. Trans-boundary Pests and Diseases. Cucumber Beetle. The most common pests for pumpkins are Aphids, Cucumber beetles, and a few types of caterpillars. They are usually angular, beginning as a yellow-green, then turning into lemon-yellow, and after a few days, becoming a light-brown in color. gathering and destroying vegetal remains in the autumn; chemical treatments with Topas 100 EC, Bravo 500 SC, Thiovit Jet, Ortiva 250 SC. Didymella bryoniae; Genuine and downy mildew; Mosaic yellow spots; Animal pests; Physiological damage; Pumpkins are heavyweights; Pumpkins (Cucurbita) belong to the oldest crops of humans, they come from Central and South America. Thew most common problems for pumpkins are leaf spot diseases, downy mildew, powdery mildew and wilt diseases. The plants are attacked in all phases of vegetation, as numerous spots appear on the leaves. Planting companion plants with your pumpkins leeks, onion, and dill, for example can help to keep pests at bay, as they deter them from the pumpkins. Diseases: Some of the common diseases affecting pumpkins include Alternaria leaf blight, Alternaria leaf spot and powdery mildew. Diseases of this culture are provoked by improper agricultural technology and unfavorable growing conditions. Subject to disease prevention and proper handling, pumpkin will grow large and tasty The statement that the disease is easier to prevent than to cure is also true for plants. Mildew is pumpkins main foliar disease. The wilting can begin from a few leaves or from the entire plant. Learn more about your crops in our library, Learn about ways to keep your crops healthy, Small, yellow-brown spots with a yellow or green halo which first appear on the oldest leaves; as the disease progresses, lesions expand and becone large necrotic patches, often with concentric patternation; lesions coalesce, leaves begin to curl and eventually die, Disease is prevalent in growing areas where temperatures are high and rainfall is frequent, Initial symptoms appear as necrotic flecks on leaves with chlorotic halos; as the disease progresses, the flecks grow into spots which may join together into large, roughly circular lesions; if infestation is severe, leaves begin to turn yellow and die, Pathogen survives between growing season on crop debris, Initial symptoms of disease occur on older leaves as small spots with light to tan brown centers; as the disease progresses, the lesions enlarge to cover large areas of the leaf surface; lesions may have a dark border and be surrounded by a chlorotic area; the centers of the lesions may become brittle and crack, Fungus survives on plant debris; spread by wind and water splash; occurs mainly in tropical and subtropical growing regions, Dead or dying leaves; yellow to brown lesions on the upper side of leaves; purple growth developing on the underside of leaves, Disease emergence favors cool nights and high moisture, Wilting of leaves progresses to wilting of entire plant and plant dies within a few days; distinctive necrotic rot of crown and upper taproot when plant is uprooted; plant breaks easily below soil line, Brown or tan spots of various sizes on leaves; leaves covered with lesions; stems splitting and forming cankers; wounds exude a brown, gummy substance; wilting vines; death of stems, Symptoms of powdery mildew on pumpkin vines, White powdery mold on stems, leaves and petioles; stems may be weakened, Disease emergence favors periods of dry weather, Initial symptoms of disease are small dark water-soaked spots on the leaves which turn beige to white in dry conditions; lesions develop thin brown borders and the centers may become brittle and crack; small white spots may erupt on the surface of infected butternut and acorn squash and pumpkin fruit, Pathogen can survive on crop debris for periods in excess of 1 year, Southern blight symptoms on pumpkin fruit, Sudden wilting of leaves; yellowing foliage; browning stem above and below soil; browning branches; stem may be covered with fan-like mycelial mat; rot on fruit that begins on side in contact with soil, Fungus can survive in soil for long periods; disease emergence favored by high temperatures, high humidity and acidic soil; disease found mainly in tropical and subtropical regions, including the southern United States, Symptoms generally appear after fruit set; chlorotic leaves which develop necrotic areas; leaves collapsing; symptoms only on one side of vine; discoloration of vascular tissue in roots, Fungus can survive in soil for many years; disease emergence favored by cool or mild weather in Spring, Small water-soaked lesions on leaves which expand between leaf veins and become angular in shape; in humid conditions, lesions exude a milky substance which dries to form a white crust on or beside lesions; as the disease progresses, lesions turn tan and may have yellow/green edges; the centers of the lesions dry and may drop out leaving a hole in the leaf, Spread through infected seed, splashing rain, insects and movement of people between plants; bacterium overwinters in crop debris and can survive for 2.5 years, Symptoms of bacterial spot on pumpkin fruit, Dark, angular lesions on leaves; leaf lesions may coalesce and cause severely blighted foliage; water-soaked lesions which enlarge and develop into tan scabs, or blisters, on the fruit; blisters eventually flatten as they reach their full size, Jack-o-lantern varieties particularly susceptible; disease can spread rapidly in a field; disease can be introduced through contaminated seed, Symptoms of bacterial wilt (image of closely related summer squash), Wilting of individual runners or entire plant; leaves and stems of affected parts turn dark green; wilting is irreversible; affected parts turn necrotic, Spread by striped or spotted cucumber beetles; disease can be confirmed by cutting the stem and slowly pulling the two ends apart - infected plants will ooze strings of bacterial exudate, Foliage turning yellow; secondary shoots begin growing prolifically; stems take on a rigid, upright growth habit; leaves are often small in size and distorted, may appear thickened; flowers are often disfigured and possess conspicuous leafy bracts; fruits are small and pale in color, Disease is transmitted by leafhoppers and can cause huge losses in cucurbit crops, Plants are severely stunted; foliage is covered in distinctive yellow mosaic; leaves of plant curl downwards and leaf size is smaller than normal; flowers on infected plants may be deformed with green petals; fruits become distorted and are small in size; fruit is often discolored.

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