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Monterey Agri-Fos Systemic Fungicide 32oz

3.9 out of 5 stars 56 customer reviews
| 10 answered questions

List Price: $35.01
Price: $20.71 & FREE Shipping on orders over $35. Details
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Only 15 left in stock (more on the way).
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  • Also controls fire blight on apples, pears, and ornamentals
  • Can be used as both preventative and curative spray
  • Active Ingredients: Mono And Di-Potassium Salts Of Phosphorous Acid
  • Monterey agri fos systemic fungicide
  • For the effective control of phytophthora diseases associated with Sudden Oak Death
  • pythium and other root rot diseases in ornamentals
  • It is designed to prevent suckering
  • Washes off without staining
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$20.71 & FREE Shipping on orders over $35. Details Only 15 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Monterey Agri-Fos Systemic Fungicide 32oz
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Total price: $43.34
Buy the selected items together


Product Description

For the effective control of phytophthora diseases associated with sudden oak death, downy mildew, phytophthora and pythium and other root rot diseases in ornamentals and bedding plants, and pythium in turf. Depending on usage, apply as foliar spray, soil drench, soil incorporation, basal bark treatment or bare root dip. Also controls fire blight on apples, pears and ornamentals. Can be used as both preventative and curative spray.

Product Details

  • Product Dimensions: 5 x 8 x 12 inches
  • Shipping Weight: 2.9 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B005G8601Y
  • Item model number: LG3335
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (56 customer reviews)
  • Amazon Best Sellers Rank: #65,536 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.


Important Information

Legal Disclaimer

Phosphorus runoff poses a threat to water quality. Some states restrict the application of phosphorus-containing fertilizer on non-agricultural lawn or turf. Check your local laws prior to purchase.

Customer Reviews

Top Customer Reviews

Verified Purchase
I bought this product based on the expert opinion of a Purdue University honors graduate. This man has a degree in tree diseases and their cures. I have a tree in my yard in Florida that kept shedding leaves, was losing some limbs, and the bark was shedding in different places. I first had to treat the tree for carpenter ants which were caused by the fungus getting into the root system and causing the roots to rot. I then used the Agri-Fos to get rid of the fungus. I have treated the tree twice and so far I am happy with the results. The tree looks much healthier and the foilage on it has really increased. I believe I am going to use this same product for two oak trees that I have that appear to have a similar problem. This product can be used on many trees and plants according to the directions. Note the tree expert I used is available through the internet at a sight called "justanswer.com"
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Verified Purchase
I have 20 Leyland Cypress on my property line. Half of them have a fungus causing them to turn brown.
This product is very effective with treating the fungus if the directions are followed. Apply in early spring,
and then mid summer. Great product.
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Verified Purchase
As far as I'm concerned, this product is a miracle. I've been plagued this year with a mysterious fungus, or some kind of disease, that has wiped out several of the established plants in the shady side of my garden. All the plants were 20+ years old. This included two camellias and my 15 foot high bougainvillea, trained on a single stem that covered the entire corner like a big red tree. I watched the roots rot away. Then the 5 white oleanders trained on a single stem started showing suspicious signs at the roots (not oleander wilt). I've sprayed once so far, and seen improvement in the remaining plants. The crape myrtle with powdery mildew has improved. The citrus that were doing poorly are looking better. I sprayed with a hose- end dial sprayer at 1 oz. per gallon (there are so many instructions I just kind of guessed). Read the scientific stuff about agri-fos on line. There's a lot of good things to recommend it for plants and for the environmental aspect. I'm just an everyday, back yard gardener who didn't want to lose more plants. It is two weeks now, and I am ready to spray again. I ordered two more 32 oz bottles which will give me enough for the rose garden this time. I can't wait to see the results there. I haven't used the Pentra Bark yet, but when it arrives I will try it on the trunks of the oleanders. Wish me luck.
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Verified Purchase
This product, applied as recommended by an expert arborist saved my dying oak tree.
It really worked for my needs.
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Verified Purchase
When overwatering a plant in a warm environment, a common result is that the roots begin to rot from fungus known as Pythium spp. Just about all of the antifungals sold at the home improvement store are completely ineffective against Pythium.

Agri-Fos is one of the least expensive fungicides that will treat root rot, plus it is systemic so it circulates throughout the plant. There are some others such as Mefenoxam (Subdue MAXX), Azoxystrobin (Heritage) but they are much more expensive and are harder to find from professional suppliers.

I used Agri-Fos to save four avocado trees. I used special spring-loaded injectors to force a dilute solution of Agri-Fos into the trunk over a few hours. Previously the avocado tree leaves always had brown edges and the trees looked like they were dying. A few months after the Agri-Fos injections, the trees have vigorous new green growth.

I will always keep this handy in the gardening shed for Pythium root rot.
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Verified Purchase
I use this on my Cleveland Pear and found that it started working on the blight. Just wish it weren't so expensive for the amount you have to use for trees.
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Verified Purchase
I have a problem with rust on my rose bushes and Liqui-Cop really worked in resolving the problem and my roses look heathly.
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Have watched my originally 30, 3 year old blueberry plants suffer from root rot the past 3 years. Each year the plants would suffer with no new growth and old growth shriving away. A few plants survived 3 years of this torture until I discovered this product. I have applied two applications on what was left of the plant leaves this spring as per the instructions and a miracle happened. New shouts and leaves appeared and growth now is vigorous. I was sceptical that anything would kill the root rot fungus once established but this product worked for me as advertized. Most information will say that your plants are doomed once they are infected with root rot and your only choice is to pull them up , burn them and plant elsewhere. Please try Agri-Fos before doing so.
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Monterey Agri-Fos Systemic Fungicide 32oz
This item: Monterey Agri-Fos Systemic Fungicide 32oz
Price: $20.71
Ships from and sold by Amazon.com