Shelly is from Phoenix, Arizona, where she likes to tend to her garden.

All recommendations are for South Carolina conditions and may not apply to other areas. As the plant’s water conduction system fails, the stems, vines, and leaves turn yellow/brown and wilt. Remove affected plant parts and sanitize your gardening tools.

Severe infections may require you to remove most or all of the affected plant to prevent further spreading.

The products mentioned are not intended to diagnose, treat, cure or prevent any disease. Bacterial Wilt. Powdery mildew on upper leaf surface.

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Examples of Fungicides Labeled for use in Home Vegetable Gardens on Cucurbits. Sorry to hear about your squash beetle problem. In order to prevent cucumber wilt, you need to know how to get rid of the beetles. Anthracnose is caused by the fungus Colletotrichum obiculare, and requires rainy, cool weather for several days for the disease to develop. I'm a new gardener and am having a problem with my cucumber plants. You can also try spraying homemade fungicides made of a mixture of soapy water, baking soda, and vinegar. It’s started off great we had tons of flower and cucumbers growing!

The only way to treat fungal diseases is with fungicides. How can I help my plant? Another fungal disease, anthracnose is most prevalent in wet and warm conditions. Apply all chemicals according to directions on the label. Voted up.

Remove and destroy old cucurbit vines and residues, since this is where the fungus survives the winter. I have cucumbers that the stem are splitting and the cuke is dying. Purchase seeds from a reputable source, since the disease can be seed-borne.

If a large part of your plant is affected, it's best to remove the entire plant from your garden.

I have a cucumber plant that was doing very well. Perfect Soil for Your Cucumber Plants

Climbing on a trellis the plants are perfect. Symptoms include leaves with brown or tan spots of various sizes that may eventually cover the entire leaf. This will provide you with the necessary organic ingredients required to improve the draining of your soil. Wet and warm conditions favor the disease.

Infected areas are often stunted and distorted and may drop prematurely from the plant. While saggy cucumber plants during the summer afternoon is a normal phenomenon; however, if sagginess in the morning, dying leaves, and dry foliage is an indication of a serious problem.

Zachary Boon Snipes, ©2015 Clemson Extension, Downy mildew symptom on upper leaf surface of cucumber.

The bacteria survive winters by living in their beetles' guts.

Rotation of crops and seed treatment will also help.

Note that picking male flowers to fertilize the females will not have any negative effect on the plant. Essentially, you need to fertilize the female flowers (with the tiny cucumbers) with pollen from the male flowers. Nancy Doubrava, Former HGIC Horticulture Information Specialist, Clemson UniversityJames H. Blake, EdD, Extension Associate/Adjunct Professor, Dept. The spores don’t need moisture to germinate, and the can spread to other plants by wind, insect, and contaminated water and gardening equipment. These brown spots can grow into irregular shapes with a yellow halo. The fruit is not affected, but in the case of cantaloupes, it will be less sweet. Infection can occur when temperatures are between 50 and 90 °F, during dry weather with high relative humidity.

Answer: Yellow spots on cucumber leaves may be caused by iron deficiency, in which case you could add fertilizer, and that should clear it up. Surround WP (kaolin, NovaSource) and other clay-based crop protectants also may help suppress cucumber beetle feeding activity.

Remove and destroy all plant debris in the garden, since the disease can survive on plant debris from year to year. Spray fungicides according to the instructions on the product label. This disease often causes leaves to fall off, making fruits vulnerable to sunscalding. Replenish bleach periodically as needed. To test if your plant has bacterial wilt, cut a drooping vine close to the crown. If a large part of your plant is infected, you may need to remove the entire plant and start over with sanitized soil. If disease is severe enough to warrant chemical control, preventative fungicides are available (Table 2).

The spores spread through water, insects, and garden tools. Prevention & Treatment: There are no varieties that are resistant to this disease. Dark spots are usually first seen on older leaves and are circular to irregularly shaped, with lighter colored centers and darker margins. Cucumbers require well-draining soil.

Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org. When this disease occurs consistently in the garden, a preventative fungicide program can be followed (Table 2). Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org.

Zachary Boon Snipes, ©2015 Clemson Extension. Bacterial wilt: no chemical control: Cucumber: Anthracnose: chlorothalonil or mancozeb 1: Downy mildew: chlorothalonil or mancozeb 1 or copper fungicide 4: Powdery mildew: sulfur 2 or chlorothalonil or horticultural oil + baking soda 3: Gummy stem blight: chlorothalonil or mancozeb 1: Alternaria leaf spot: chlorothalonil or mancozeb 1 or copper fungicide 4: Scab

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There are no chemical treatments available for control.

White, powdery spots on leaves are a tell-tale sign of powdery mildew.
Sanitize gardening tools, including boots, gloves, spades, and shears.

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