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How to Control Fungus on Vegetable Plants
For anthracnose, early tomato blight, leaf blight and spots, powdery mildew and as a general fungicide, Sodium Bicarbonate commonly known as baking soda possesses fungicidal properties. It is recommended for plants that already have powdery mildew to hose down all the infected leaves prior to treatment. This helps to dislodge as many of the spores as possible to help you get better results. Use as a preventative treatment at first signs of any diseases. To make mix 1 tablespoon of baking soda, 2 ½ tablespoons of vegetable oil with one gallon of water. Shake this up very thoroughly. To this mix add ½ teaspoon of pure castille soap, which contains olive oil, and spray. Be sure to agitate your sprayer while you work to keep the ingredients from separating. Cover upper and lower leaf surfaces and spray some on the soil. Repeat every 5-7 days as needed. If you have some fresh chives available, a chive spray can be made to prevent apple scab, and downy mildew on cucumber, pumpkin, and zucchini. Put a bunch of chopped chives in a heatproof glass container, cover with boiling water. Let this sit until cool, strain and spray as often as two to three times a week. Many folks have success with manure tea to keep blight and other pathogens away from plants. Soak the area around plants and use as a foliar spray. This treatment is not recommended for seedlings. To make manure tea fill a 30-gallon trash can with water. If using city water, let it sit for 24 hours so the additives will evaporate. Add 4-5 shovelfuls of composted manure and let it sit for 2-3 weeks stirring once a day. Pour off the manure tea from the top or strain with cheesecloth. Apply as needed. Chicken manure is nitrogen rich and is good for heavy feeders like corn, tomatoes, or squash. Cow manure contains potash, use for root crops. Rabbit manure promotes strong leaves and stems and horse manure is good for leaf development. Milk has natural enzymes and simple sugars that can be used to combat various mildews on cucumber, asters, tomato, squash, and zinnia foliage. Use a 50/50 mixture of milk and water. Thoroughly spray plants every 3 to 4 days at first sign of mildew or use as a preventative measure. If possible, use drip irrigation to avoid splashing water and fungal spores around the garden. It's OK to remove the lower leaves from most plants so the soil pathogens that can cause fungus and mildew problems won't splash onto the leaves.
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Hot, humid weather can cause serious fungus problems on ornamental and vegetable plants. Roses can be ruined and pumpkin or squash plants can be damaged by fungal problems so here are some homemade recipes that will help keep your garden bright, green and fungus free.
