All About...Plant Diseases
Powdery Mildew
Numerous strains of fungi are commonly referred to as Powdery Mildew. Since this disease removes essential nutrients from the plant, leaves may become yellow, stunted or drop off prematurely. More»
Black Spot
Roses, especially hybrid tea roses, are highly susceptible to this infectious fungal disease. Black spots, as the name implies, will appear on the leaves, followed by a yellowing surrounding the spots.
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More about Plant Diseases»
Expert Tips for a Beautiful Garden!
Gardening can be a very rewarding and healthy undertaking. By using organic products and methods, plants grow better, insect pests can be controlled, plant diseases can be eliminated, and lush harvests can be enjoyed!
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Safer® Brand Garden Fungicide, Concentrate
Purpose:
Controls Powdery Mildew, Black Spot, and Rust on flowers, fruit, and vegetables
Directions for Use:
PREPARATION:
For control of Black Spot, Leaf Spot, and Rust, mix 1 part concentrate to 30 parts water or 4 fl. oz. (8Tbsp.) per gal. of water.
For powdery mildew mix 2 fl. oz. (4 Tbsp.) per gal. of water.
Place about half of the volume of water in sprayer, add concentrate, stir well, add rest water and mix thoroughly. Turn agitator on large tank sprayers.
For coverage, see individual applications. Spray plants thoroughly to wet the upper and lower surfaces of foliage. Repeat as recommended.
INDIVIDUAL APPLICATIONS:
SHAKE WELL before use.
To control powdery mildew, leaf spot, and rust on FLOWERS, FOLIAGE PLANTS AND ORNAMENTALS, spray at 7 to 10 day intervals or as needed.
To control powdery mildew, black spot and rust on ROSES, spray a 7 to 10 day intervals, or following rain. Be sure to treat new growth and buds. Avoid spraying when plants are in full sun or temperature exceeds 85 degrees F. Apply 1 gal. Mix to each 350 sq. ft.
To control powdery mildew on BEANS AND PEAS, spray at first sign of disease and repeat at 7-day intervals as necessary. May be used up to day before harvest. Apply 1 gal. of mix to each of 250 sq. ft.
To control powdery mildew on APPLES AND PEARS, apply to thoroughly wet foliage. Apply at pre-bloom stage or after petal fall as needed.
NOTE: Some apple and pear varieties are sulfur sensitive; test for varietal sensitivity prior to full scale treatment.
To control powdery mildew on POTATOES, spray before disease appears and repeat as necessary. Apply 1 gal. of mix to each 350 sq. ft.
To control powdery mildew on CUCUMBERS and SQUASH, spray when powdery mildew appears and repeat as necessary. Do not spray young plants. Apply 1 gal. of mix to each 600 sq. ft.
To control powdery mildew on STRAWBERRIES, spray when disease appears and repeat as necessary. Do not spray young plants or apply to strawberries that will be used for canning. May be used up to the day before harvest.
To control powdery mildew on GRAPES, thoroughly cover foliage. Begin when new shoots are 6-10 inches. Repeat before blooms open and at 14 day intervals as needed. CAUTION: Do not apply to wine grapes within 21 days of harvest. Sulfur may damage concord and other labrusca varieties.
HOME GREENHOUSE APPLICATION:
SHAKE WELL before use.
To control powdery mildew, leaf spot and rust on bedding plants, propagates, fruits and vegetables:
Mix 1 part concentrate to 30 parts water (8 Tbsp. Per gal.) and apply according to above recommendations by crop type. Test for phytotoxicity before full-scale application.
Use Cautions:
- Some plants are susceptible to injury from sulfur under certain climatic conditions.
- Do not apply on Boston fern, spinach, apricot, filberts, walnuts, and viburnium.
- Do not apply when temperature exceeds 85 degrees F.
- Do not apply for at least 4 weeks following application of an oil spray or within 4 days of other pesticides.
- Be sure to wash and rinse spray equipment thoroughly after each use.
- Do not allow mixed spray to stand in spray equipment.
- Avoid contact with plants until spray has dried.
Storage and Disposal:
Storage: Store in a cool place.
Disposal: Do not reuse empty container. Securely wrap the original container in several layers of newspaper and discard in trash. Rinse empty container will prior to disposal.
Plant Disease Control - FAQs
Q: How do I know if my plant is being attacked by an insect or a disease?
A: If it’s an insect, the plant may have holes in its leaves. Turn the leaves over and you may see the
insects themselves clustered on the underside of the leaves. You may also see and feel a sticky
substance if it’s an insect because the insect will leave a secretion on the plant.
Q: My pumpkins' leaves have white powder on them. What is it? How do I get
rid of it?
A: It sounds like you are talking about powdery mildew. There are fungicides,
such as Safer® Brand Garden Fungicide, on the market that can work
effectively in controlling powdery mildew. More»
Q: How do I get rid of anthracnose on my dogwood tree?
A: The best way to control anthracnose includes several measures. Starting with varieties that are
resistant to disease, especially anthracnose. Be sure to prune the tree during the dormant season
by removing dead branches. More»
More FAQs»
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