1. It is best to use any type of spray in the early morning or the cool of evening. Do
not spray when temps are above 80 degrees Fahrenheit! Your plants may "burn" or
have a reaction to what you are using in excessive heat. This is known as
2. Always perform a test on a small portion of the plant material first. Wait 24 hours to
observe any negative reaction. Proceed if there is no damage.
3. Really and truly...more is not better. If you are not getting good results don't
increase the strength of these remedies without testing first.
4. Target just the area you need to treat. Be careful... try not to harm the good
You don't want to run off your allies.
5. When working with sprays or dusts always protect your exposed skin and face. Some of
these ingredients can be very irritating to your skin, eyes and mucous membranes,
especially any hot pepper sprays.
Apple tree scab: Grow any
member of the onion family around the base of the tree. Chives work the best.
You can also make a tea from chives and use as a spray on your apple trees to
help protect from scab.
Keeping the soil pH around 7.0 to prevent club root disease.
Peach tree leaf curl: This is
a common disease of peach trees. Sprays of horsetail tea, garlic (look further
down the page for recipes) and seaweed can help to prevent this problem. Growing
chives underneath them also helps.
will help prevent rust disease, black spot and can act as a
Potato scab: When planting
your potato sets put some wilted comfrey leaves in with them to prevent scab.
Also keeping the soil for your potato patch with a pH of 5 or below (acid) or a
pH of 7 or above (alkaline) to prevent scab.
Apple Cider Vinegar Fungicide:
For leafspot, mildew, and scab
- Mix 3 tablespoons of cider vinegar (5% acidity)
with one gallon water and spray in the morning on infested plants. Good for black spot on
roses and aspen trees too.
anthracnose, early tomato blight, leaf blight and spots, powdery mildew,
and as a general fungicide
Sodium bicarbonate commonly known as baking soda has been found to posses 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
possibly to help you get better results. Use as a prevention or as treatment at first
signs of any of the diseases.
Mix 1 tablespoon baking soda, 2 1/2 tablespoons vegetable oil with one
gallon of water. Shake this up very thoroughly. To this mix add 1/2 teaspoon of pure
Castile soap 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.
For preventing apple scab and downy mildew
on cucumber, pumpkin and zucchini.
To make: Put a bunch of chopped chives in a heat proof glass container, cover with
boiling water. Let this sit until cool, strain and spray as often as two to three times a
Compost and Manure Teas
Many people have success with manure tea keeping blight and other pathogens
away from plant. Soak the area around plants and use as a foliar spray. Do not use on
seedlings as it may encourage damping-off disease.
Fill a 30 gallon trash can with water. Let sit for 24 hours to evaporate the additives
(use rain water if you can). Add about 4 shovels
worth of manure to this and cover. Let it
sit for 2-3 weeks, stirring once a day. Strain and apply as needed.
Various manures supply
nutrients as follows:
- Chicken manure: nitrogen rich: use for heavy
feeders such as corn, tomatoes and squash.
- Cow Manure: potash: use for root crops.
- Rabbit manure: promotes strong leaves and stems.
- Horse manure: leaf development.
Compost Tea: Make and use just the same as you would the manure tea. This is
another terrific reason to compost all those prunings, grass clipping and kitchen wastes.
Or you can use our HumAcid for a ready made
foliar spray with all the goodness of compost!
Corn and Garlic Spray Fungus Preventative
This blend is surprisingly potent preventative spray to protect your plants.
Gather a handful of corn leaves, clematis leaves (any kind) and as much of the
papery outer leaves of garlic as you can. Process thoroughly in a blender. The
mix with sufficient water to make a thin liquid. Let sit for an hour, strain and spray on
plants as a preventative.
Couch Grass Rhizome Tea:
for preventing mildew and fungus disease
Put a handful of fresh rhizomes in a glass pot. Pour 1 quart of boiling water
over rhizomes, cover and let steep for 10 minutes. Strain, let cool and use right away.
Elder Leaf Spray:
Elder leaves have fungicidal
properties and may be useful against mildew and black spot diseases.
Castile soap. Add soap mixture to the elder water,
spray as needed. Note: Set your sprayer to a coarse or large droplet setting as this
mixture will tend to plug a fine setting.
- To make: simmer 8 ounces of leaves in 16
ounces of water for 30 minutes. Stir this thoroughly, then strain. Take 16 ounces of warm
water and mix with 1 tablespoon of
For leaf spot
- To make: Combine 3 ounces of minced garlic cloves with 1 ounce of mineral oil. Let soak
for 24 hours or longer. Strain.
- Next mix 1 teaspoon of fish emulsion with 16
ounces of water. Add 1 tablespoon of castile soap to this.
- Now slowly combine the fish emulsion water with
the garlic oil. Kept in a sealed glass container this mixture will stay viable for several
months. To use: Mix 2 tablespoons of garlic oil with 1 pint of water and spray.
Fungicide Spray 2:
Fungicide and Insect repellent
Put in a blender: 1 whole head of garlic, 3 cups water, 2 Tbs
canola oil, 4 hot peppers and a whole lemon. Blend until finely chopped. Steep
mixture overnight. Strain through fine cheesecloth. Use at a rate of 4Tbs per
gallon of water. Store unused portion in the refrigerator.
(preventative for fungal disease)
Penn State University announced in 1995 that minced horseradish holds promise in
decontaminating wastewater and now says it may clean contaminated soils as well!
Penn State's center for Bioremediation and Detoxification reports that minced horseradish
combined with hydrogen peroxide can completely remove chlorinated phenols and other
contaminants found in industrial wastes. Experiments involve applying the mixture directly
to tainted soils or growing horseradish in contaminated soil and roto-tilling the roots
just before applying hydrogen peroxide!
The cleansing properties of horseradish have been known for more than a decade, however
creating a purified form has been far too expensive. This method has proved to be just as
effective, but at a fraction of the cost!
Horseradish Tea: You can also make a tea from horseradish roots to use as a
preventative spray for fungal diseases. This is especially useful against brown rot in
apple trees. The white flesh of the horseradish root also contains significant amounts of
calcium, magnesium and vitamin C.
To make: Process one cup of roots in food processor till finely chopped. Combine
this with 16 ounces of water in a glass container and let soak for 24 hours. Strain
liquid, discard the solids. Now mix the liquid with 2 quarts of water and spray.
Hydrogen Peroxide Treatment
To prevent bacterial and fungal problems on outdoor plants use hydrogen peroxide!
Hydrogen peroxide will prevent the disease spores from adhering to the plant tissue. It
causes no harm to plants or soil, however don't use on young transplants or direct seeded
crops until they have become established. Warning: Always test on a small
portion of plant tissue first to check for any negative reactions. Do not
proceed if there is any damage to plant tissue. Do
not substitute food grade H2O2 for the common H2O2.
Spray plants with undiluted 3 percent hydrogen peroxide that you can buy most anywhere. Be
sure to cover tops and bottoms of leaves. Do this once a week during dry weather and twice
a week in wet weather. This works as a preventative. If you already have problems use this
as a direct treatment.
Milk with its' natural enzymes and simple
sugar structures can be used to combat various mildews on cucumber, asters, tomato,
squash and zinnia foliage. This works by changing
the pH on the surface of the leaves, so they are less susceptible to
mildew. Use a 10/90% mixture of milk and water. I.E.: To make 10 ounces
of finished spray use 1 oz of milk to 9 ozs. water. Thoroughly spray plants
every 3 to 4 days at first sign of mildews or use weekly as a preventative measure.
Milk can also be mixed at a rate of 2 ounces milk to 18 ounces of water and used as a
spray every 7 to 10 days to treat mosaic disease on cucumber, tomato and lettuce.
Tomato Virus Protective Spray
To prevent the many viruses that attack tomato plants this simple remedy really works! The
antitranspirant protects the plant surface against disease spores. The skim milk provides
the tomato plant with calcium. A calcium deficiency is common in tomato plants.
Antitranspirants can be used to protect many plants against bacterial disease before they
attack. They are harmless and will not block the pores of the plant tissue.
To make: Mix 1/2 teaspoon of antitranspirant (like Cloudcover, Wiltpruf
etc.) with 8 ounces of skim milk, and 1 gallon of water. Spray plants. Clean out your
sprayer when done and flush with fresh water..
NOTE: an equivalent of prepared powdered milk may be substituted for the skim milk.
Removing leaves on the lower portion of the plant may help lessen contact with disease
spores and certainly won't hurt the plant.
Seedlings: Damping off disease
Always use a sterile growing medium like mixes with vermiculite and perlite for your
seed starting as these should not contain the fungi that cause damping-off. Water your
seedlings with warm water that has been left to sit for an hour or more to dissipate most
of the chemicals that are present in tap water. Using cold water stresses the seedlings
leaving them vulnerable to harmful organisms.
1. Chamomile Spray: Chamomile tea is an excellent preventative for damping-off.
Use on seed starting soil, seedlings and in any humid planting area. Chamomile is a
concentrated source of calcium, potash and sulfur. The sulfur is a fungus fighter. This
can also be used as a seed soak prior to planting.
To make: Pour 2 cups boiling water over 1/4 cup chamomile blossoms. Let
steep until cool and strain into a spray bottle. Use as needed. This keeps for about a
week before going rancid. Spray to prevent damping off and anytime you see any fuzzy white
growth on the soil. Chamomile blossoms can be purchased at health food stores and usually
2. Seaweed Spray: A seaweed spray which is so rich in nutrients and everything
that seedlings require can also be used to prevent damp-off. Make a strong mixture adding
2/3 cup of kelp concentrate to 1 gallon of water, spray.
3. Horsetail Tea (Equisetum arvense)
The common horsetail plant, which is very invasive, is rich in silicon and helps
plants to resist fungal diseases via increasing their light absorbing capabilities. Use on
peach trees to control peach leaf curl. Use on most plants to combat powdery fungi, and on
vegetables and roses to control mildew.
You can use this on seedlings and plants in closed environments too! Great in greenhouses!
Prevents damping off. Horsetail is one of the ingredients in Golden Harvest
- In a glass or stainless steel pot, mix 1/8 cup of
dried leaves in 1 gallon of unchlorinated water. Bring to a boil, then let simmer for at
least 1/2 hr. Cool and strain.
- Store extra concentrate in a glass container. Will
keep for a month.
- Dilute this mix, adding 5-10 parts of
unchlorinated water to one part concentrate. Spray plants that show any symptoms of fungal
type disease once every 4 days. Spray your seed starting mixtures to prevent damping off.
4. Spread finely milled sphagnum peat moss on the soil
surface of your seed beds or flats.
The best damping off remedy: Powdered cinnamon!
Sprinkle powdered cinnamon on the soiless medium surface. Don't worry if you
get cinnamon on your plants as it will not hurt the tender seedlings. We have
been using this method for years with near 100% effectiveness.