(888) 784-1722
10% off during the summer sale! See promotion page for details

Organic Fungicide

About organic fungicide

If you apply organic fungicide you should wear a respirator and protective clothing, and follow the instructions on the product label to the letter.

Biological fungicides

Biological fungicides are beneficial microbes that protect plants from soil-borne pathogens (like pythium and botrytis) as well as air-borne pathogens (like fire blight and powdery mildew). Biological fungicides supplement rather than harm biological life in soil. The mineral-based fungicides can actually harm the soil's life.

Botanical insecticides/fungicides

These are made from plants with pesticidal qualities. These materials, while safer to the user and the environment than chemical pest controls, are very strong and should be used as a last resort. Used inappropriately, these stronger botanicals (like rotenone, pyrethrin, and sabadilla) can cause more trouble by upsetting the biological balance and triggering secondary pest outbreaks. For severe situations they can be used on a temporary basis.

Neem oil

Neem oil is best as a preventative, or in low-disease-pressure situations, for fungus problems. Use it to control diseases such as powdery mildew, anthracnose, botrytis, rust, leaf spot, or flower blight.

Organic Gardening Resource Center - Your Source Since 1976!
Organic Gardening

Read our Blog Customers and Peaceful Valley staff share their organic fungicide knowledge at groworganic.com/organic-gardening

Find the solutions you need in our Pest Control Solution Chart!

Oil products

Used as dormant oils, growing-season sprays or spray adjuvants for smothering pests such as overwintering scales, mites, aphids, and peach twig borer. May be unnecessary for small scale users unless experience shows a serious problem with these pests. Many orchards do well and have never been sprayed with oils. In commercial applications or serious pest outbreaks, the use of oils may be necessary.

Mineral fungicides

Generally considered acceptable for organic production, but should be used as a last resort. Other options are highly preferable to mineral-based fungicides because they do not harm beneficial microbial populations and leave soil’s “immune system” intact. As some people are sensitive to sulfur and copper-based materials, we especially recommend the use of respirator masks and protective clothing. Note that copper negatively affects the activity of microorganisms and earthworms, and it accumulates in the soil, so minimize its use. Sulfur, on the other hand, is assimilated by the plants and soil as a nutrient.

Copper fungicides

The strongest and most broad-spectrum fungus controls we offer. Use only when other techniques have failed. Copper can be detrimental to plants and soil when applied in rates above the recommended amounts. Often used in the dormant season. Read the label!

Sulfur fungicides & miticides

Sulfur is broad-spectrum with little detrimental environmental effects. Can be irritating to the eyes, ears, and nose during application. Used for the control of powdery mildew on grapes and other crops, it is effective against most species of pest mites, brown rot, rust, and scab. Often used in the dormant season.

Note to Certified Organic Farmers: While we do our best to stay current with product OMRI listings, be sure to check with your certifying organization for a current list of approved (or banned) products.

Organocide Concentrate (Quart)
Organocide Concentrate (Quart)

POP250

(2)

$16.99
Add to Wishlist
Kaligreen (5 Lb)
Kaligreen (5 Lb)

PFM580

$59.99
Add to Wishlist
Surround WP (25 Lb)
Surround WP (25 Lb)

PMB380

$34.99
Add to Wishlist
Organocide Ready To Use (24 Oz)
Organocide Ready To Use (24 Oz)

POP251

(2)

$12.99
Add to Wishlist
Debug Turbo Quart
Debug Turbo Quart

PBT620

2 Reviews

$59.99
Add to Wishlist
Actino Iron (10 lb)
Actino Iron (10 lb)

PFM1006

$39.99
Add to Wishlist
Regalia Fungicide (1 Gal)
Regalia Fungicide (1 Gal)

PFM1200

$89.99
Add to Wishlist

Free Seed Packs

With Online Orders

  • 2 free seed packs on orders of $50
  • 5 free seed packs on orders of $100

Browse Peaceful Valley Organic Vegetable Seed Packs

Grow Organic

  • For a healthy and safe food supply
  • For a clean and sustainable environment
  • For an enjoyable and rewarding experience

For Life!

Weekly Newsletter

  • Garden Tips and Tricks
  • Video How-To's
  • Exclusive Coupons