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ladynebt

First time pumpkin grower. HELP!!

Ladynebt
12 years ago

This is my first time growing pumpkins. I am growing pumpkins on my roof each in their own large containers. They are growing like monsters. They are growing six inches a day and also forming new vines. They were giving off plenty of flowers but the leaves are dying. First the leaves get little holes in them and the holes have brown borders. Then the brown borders grow and take over large parts of the leaf. After a while the brown parts start to fall over but the green parts stay upright. No wilting. The leaf stem eventually turn yellow but only after the leaf turns brown.

The vine is still green and new leaves are growing.The one pumpkin formed new roots along the vine in a pot of dirt I left out. I have tried two different fungicide all sufate based. I have also tried baking soda and milk. Any suggestions? Each plant has a pumpkin on it and I want the plant to survive long enough for the pumpkin to ripen!

Comments (9)

  • terrybull
    12 years ago
    last modified: 9 years ago

    what is your fertilizer and how much.

  • Ladynebt
    Original Author
    12 years ago
    last modified: 9 years ago

    I use Espom garden fertilizer and some seaweed stuff. I don't use much fertilizer because I mixed a lot of compost in with the soil.

  • terrybull
    12 years ago
    last modified: 9 years ago

    Angular Leaf Spot
    This bacterial disease can occur on most cucurbits, including cucumber, muskmelon, pumpkin, and winter squash. The disease is less common on cucumber because resistant varieties are widely grown. Leaf spots are variable in size and may be angular in shape because leaf veins limit enlargement of spots. Initial symptoms appear as brown water-soaked spots, as illustrated on butternut squash (fig. 1). Under moist conditions, especially in early morning, small droplets of bacterial ooze can come from the water-soaked areas; which, when dry, appear as a white residue. The initial brown spots may be surrounded by a yellow halo, become white, and, as they dry, tear away from the healthy tissue, producing irregular holes in the affected leaves. Fruit spots are smaller than leaf spots and are usually circular (fig. 2). These spots, as shown on the processing squash Delicious, are usually superficial but can develop into deeper rots if secondary soft-rot bacteria invade.

    The bacteria can survive for possibly 2 years in soil or debris from diseased plants. It is also known to be associated with seed. Bacteria can enter through wounds or stomates. Moisture in the form of rainfall or relative humidity greater than 95 percent for several days is required for infection and later disease development. Dry weather for 2 weeks can arrest the disease. Controls include the selection of resistant cucumber varieties, use of disease-free seed, and a 2year rotation out of all cucurbits. Check with your seed supplier for the current list of resistant cucumbers. Copper fungicides can be applied to slow disease spread during particularly wet periods but can be dropped if dry weather continues for 2 weeks.

    Ulocladium Leaf Spot of Cucumber
    This disease has occurred in New York in localized plots near Ithaca since the early 1980s but was first found in commercial cucumber fields in 1988. It has since been reported from other areas of the country and was previously recorded as a different fungal species in England and parts of Europe. Because only cucumbers are affected and superficially the disease could be confused with angular leaf spot, which previously was a major concern for cucumber growers, the disease may have been present for a longer period than realized. The appearance of symptoms and the environmental conditions required for disease development differ greatly from those of angular leaf spot.

    Ulocladium leaf spot lesions may appear in early to mid-August as reddish brown spots 1 to 2 mm in diameter on lower leaves near the crown (fig. 3). With adequate moisture and moderate summer temperatures, lesions enlarge (fig. 4). Lesions are mostly circular to irregular in shape, measuring 6 to 7 mm in diameter, but occasionally are larger. The centers are beige to brown but occasionally white, surrounded by a dark brown ring and a brown halo. Lesions may tear as the leaves mature. No fruiting bodies are present. Lesions are typically invaded by a secondary fungus (Alternaria alternata), which acts as a saprophyte. Conidia morphology is temperature-dependent, appearing alternarioid at 46� F, intermediate at 70� F, and ulocladioid at 81� F.

    Ulocladium cucurbitae survives between crops on infected debris in the soil, probably as dormant mycelium or as chlamydospores (thick-walled modifications of the mycelium) similar to Alternaria spp. Conidia that act as primary inoculum for infections are produced in the spring under appropriate conditions. A 2-year rotation out of cucumber should be practiced. Currently available cucumber varieties are resistant to angular leaf spot but are susceptible to U. cucurbitae. Varieties resistant to Ulocladium leaf spot will be available soon. Protectant fungicides provide effective control.

    Alternaria Leaf Blight
    Alternaria leaf blight caused by the fungus Alternaria cucumerina is a common disease of muskmelon (cantaloupe) but can also infect watermelon, squash, and cucumber. Leaf blight usually occurs from midseason or when the canopy closes, can reduce late season fruit production, and can result in poor quality if the disease is severe (fig. 5). Symptoms first appear on the upper surface of crown leaves as small spots 1 to 2 mm in diameter although other lesions can be more than 10 mm in diameter (nearly one-half inch) (fig. 6). These larger spots can show a targetlike pattern of rings which is typical of most Alternaria spp.

    Leaf blight overwinters as mycelium or chlamydospores in diseased plant debris and can probably survive for more than a year. Conidia are produced in the spring and act as the primary inoculum. Conidia produced on infected plants provide inoculum for repeating secondary cycles during the season. A 2-year rotation out of cucurbits is the easiest way to break this cycle. There are few Alternaria-resistant varieties. Protectant fungicides should be applied in mid-July when vines run and fruit have been set. Infection and disease development are favored by lengthy periods of high relative humidity (18 hours) over a broad range of temperatures (68 to 90� F).

    Downy Mildew
    This devastating disease is caused by the fungus Pseudoperonospora cubensis. The disease is most important in the Northeast on muskmelon, pumpkin, and winter squash, though all cucurbits are susceptible. Because the fungus does not overwinter in the North, the disease is reintroduced each season by airborne conidia blown into the area from southern states. If appropriate conditions are present, plantings can be infected so rapidly that they appear to have been frosted (fig. 7). Foliar symptoms vary depending on how quickly infection occurs. Upper surfaces of leaves may show angular pale-green areas bounded by leaf veins that give the impression of mosaic. These areas change to yellow angular spots and become necrotic as the disease progresses. When leaves are infected by a heavy spore shower, small individual necrotic and chlorotic flecks appear on the upper surface (fig. 8). In a moist environment, sporulation occurs on the lower leaf surface. The chlorotic flecks appear as light brown areas when held up to the light. Areas with active sporulation give the undersurface a purplish or dark brown sooty appearance (fig. 9). The fungal growth consists of large lemon-shaped spores called sporangia that are borne on branched structures called conidiophores. The sporangia are wind-borne and can survive over long distances when the air is moist. They are also readily spread to adjoining plants by splashing rain.

    Although most downy mildew fungi are considered cool, wet weather diseases, cucurbit mildew can infect plants over a wide temperature range (50-80� F) with the optimum at 61-72� F. Periods of heavy dew lasting into midmorning are sufficient for infection to occur. Mid-August is a critical time to scout for mildew because appropriate environmental conditions usually exist then in the Hudson Valley and on Long Island. Because disease development is dependent upon outside inoculum, rotation cannot prevent the disease. Select resistant varieties if they are available. Downy mildew can be controlled with the application of protectant and systemic fungicides.

  • taxtax
    12 years ago
    last modified: 9 years ago

    Well you have just given me an interesting idea. I'm not sure what you mean by roof, an actual roof, or is there a patio up on yours?

    Anyhow, now I'm wondering about potting my pumpkins next year, and leaving the pots on top of the shed, allowing the vines to hang down the walls, instead of having them spread all over my lawn causing difficulty in mowing.

  • Robertpumpkin1
    12 years ago
    last modified: 9 years ago

    Look at these pistures

    Here is a link that might be useful: Disease

  • Ladynebt
    Original Author
    12 years ago
    last modified: 9 years ago

    I have a deck on my roof and I grew the pumpkin in five gallon buckets that I drilled drainage holes in. I don't think they are big enough. I left some shallow containers filled with dirt because I found out that they like to grow roots along the vines. Since they aren't growing in dirt, I figured the plots were the best alternative. I am still not sure if growing pumpkins in a container was a good idea. Ask me in October. Next year if I do the same thing I will grow my pumpkins in kiddy pools.

  • terrybull
    12 years ago
    last modified: 9 years ago

    you can grow in containers, heres my swc they need lots of water. these are drinking 5 gals a day. last year i grew a 70lb pumpkin in a small swc, it would drink every drop of water.
    {{gwi:43368}}

  • Ladynebt
    Original Author
    12 years ago
    last modified: 9 years ago

    Oh wow that is awesome. Do you have any tips? I did manage to get two pie pumpkins from two plants but now the vines have turned brown. One plant is completely gone but the other plant has one green vine. The problem is that the one living vine made roots in another small plot of dirt I left for it but the rest of the vine, the part that connects to the main root has died. I don't know whether to give up on the entire plant or try to get the plant to grow more roots along the vine. I was going to cut the vine tips and bury them in dirt to see what happens. Any suggestions?
    How many pumpkins did you get from that plant? Just the 70lb one?

  • terrybull
    12 years ago
    last modified: 9 years ago

    this one is still growing. the 70lb was grown in a small self watering container last year. i was just saying that a large pumpkin can be grown in a small container and they go through the water.this picture was taken 1 week later and you can see the difference in how much they grow in a week.
    {{gwi:41316}}

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