Fungicide

Fungus can severely damage lawns, gardens, and crops if not treated quickly or prevented entirely. Fungicides have long been part of disease management programs in gardens, greenhouses, and golf courses. You can prevent fungus from damaging your lawn yourself using our professional grade fungicides. 

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 10% Off Select Fungicides -Keep Your Yard Free From Disease


 

10%
Off
Eagle 20EW Specialty Fungicide Quick View
4.5 out of 5 stars (85)
On Sale!
$43.65
Was: $48.50
Free Shipping!
Multiple sizes available
A professional systemic, protectant and curative fungicide for turf-grass, ornamentals, greenhouse and nursery ornamentals, apples, stone fruits and grapes.
10%
Off
3336F Fungicide Quick View
5 out of 5 stars (65)
On Sale!
$67.98
Was: $75.53
Free Shipping!
Multiple sizes available
A professional systemic fungicide for the prevention and control for turf-grass, annual and perennial flowers, bedding plants, foliage plants, ground covers, deciduous trees and shrubs.
10%
Off
Pillar G Intrinsic Granular Fungicide Quick View
4.5 out of 5 stars (35)
On Sale!
$123.00
Was: $136.67
Free Shipping!
Multiple sizes available
A professional granular fungicide for disease control and plant health for commercial & residential turf-grass on golf courses and sod farms.
12%
Off
Prime Source Propiconazole 14.3 Select Fungicide Quick View
4.5 out of 5 stars (22)
On Sale!
$34.08
Was: $38.87
Free Shipping!
Multiple sizes available
A professional systemic fungicide that provides preventive and curative control of diseases in turf-grass and ornamental plants.
10%
Off
Heritage SC Fungicide - 4 oz. Quick View
5 out of 5 stars (9)
On Sale!
$39.98
Was: $44.42
Free Shipping!
A broad-spectrum, systemic fungicide that provides exceptional control of over 25 turf diseases and over 30 ornamental diseases with extended application intervals of up to 28 days.
10%
Off
Heritage G Fungicide Quick View
4.5 out of 5 stars (132)
On Sale!
$79.98
Was: $88.87
Free Shipping!
Multiple sizes available
A professional fungicide that is a systemic strobilurin fungicide in a granular formulation, and specifically for controlling diseases up to 28-days for turf-grass.
10%
Off
Headway G Fungicide Granules Quick View
4.5 out of 5 stars (60)
On Sale!
$79.98
Was: $88.87
Free Shipping!
A professional combination of two broad-spectrum, preventative fungicides with systemic properties that controls many turf-grass diseases.
10%
Off
Propiconazole 14.3 Fungicide Quick View
4.5 out of 5 stars (71)
On Sale!
$49.98
Was: $55.53
Free Shipping!
Multiple sizes available
A broad-spectrum fungicide that provides excellent disease control on cool and warm-season grasses, trees, flowers, and shrubs.
10%
Off
3336 DG Lite Granular Fungicide Quick View
4.5 out of 5 stars (20)
On Sale!
$84.98
Was: $94.42
Free Shipping!
A professional systemic fungicide for the prevention and control diseases on turf and annual and perennial ornamental plants.
10%
Off
Bonide INFUSE Lawn & Landscape Fungicide Granules Quick View
4.5 out of 5 stars (11)
On Sale!
$34.27
Was: $38.08
Free Shipping!
Multiple sizes available
A granular systemic fungicide for diseases on lawns, annual and perennial flowers, plants, ground cover and evergreen shrubs and trees.
10%
Off
Caravan G Insecticide Fungicide Quick View
3.5 out of 5 stars (11)
On Sale!
$99.98
Was: $111.09
Free Shipping!
A professional fungicide insecticide granular combination of Heritage fungicide and Meridian insecticide on commercial and residential turf-grass and golf courses.
10%
Off
Bonide Liquid Copper Fungicide Concentrate Quick View
4.5 out of 5 stars (14)
On Sale!
$28.94
Was: $32.16
Free Shipping!
Multiple sizes available
A natural fungicide that is approved for organic gardening, flowers and lawns for powdery mildew and other diseases.
10%
Off
Azoxy 2SC Select Fungicide Quick View
5 out of 5 stars (8)
On Sale!
$69.98
Was: $77.76
Free Shipping!
Multiple sizes available
A professional fungicide that controls many turf diseases on golf courses, commercial and residential turf.
10%
Off
Bonide Mancozeb Flowable with Zinc Concentrate Quick View
5 out of 5 stars (5)
On Sale!
$29.60
Was: $32.89
Free Shipping!
Multiple sizes available
A fungicide with zinc for a broad spectrum of disease control on ornamental plants, trees and vegetables.
10%
Off
Ultra-Pure Oil Horticultural Insecticide, Miticide and Fungicide Quick View
4.5 out of 5 stars (8)
On Sale!
$94.50
Was: $105.00
Free Shipping!
A professional 99% pure mineral oil that is a year-round horticultural spray for many commercial uses against insects, mites and fungus.
10%
Off
Armada 50 WDG Fungicide Quick View
4.5 out of 5 stars (18)
On Sale!
$159.00
Was: $176.67
Free Shipping!
A professional fungicide that is preventative and curative for commercial & residential in turf-grass, ornamental plants to trees.
10%
Off
Cease Biological Fungicide Quick View
4 out of 5 stars (4)
On Sale!
$86.38
Was: $95.98
Free Shipping!
A biological fungicide that controls a wide range of bacterial and fungal diseases in plants.
10%
Off
Ferti-lome Liquid Systemic Fungicide II Quick View
5 out of 5 stars (16)
On Sale!
$24.06
Was: $26.73
Free Shipping!
Multiple sizes available
A systemic fungicide for lawns, flowers, rose bushes, shrubs and trees that controls many diseases for up 4 weeks.
10%
Off
Garden Tech Daconil Fungicide Concentrate Quick View
2.5 out of 5 stars (4)
On Sale!
$30.38
Was: $33.75
Free Shipping!
A fungicide liquid concentrate that kills and controls more than 80 diseases on flowers, fruits and vegetables, shrubs and trees.
10%
Off
Chlorothalonil 720 SFT Fungicide Quick View
5 out of 5 stars (4)
On Sale!
$109.00
Was: $121.11
Free Shipping!
A professional fungicide that controls dollar spot, brown patch, algae and others for nurseries, greenhouses, landscaping and golf courses.
10%
Off
Monterey Garden Phos Systemic Fungicide Quick View
4.5 out of 5 stars (25)
On Sale!
$31.98
Was: $35.53
Free Shipping!
Multiple sizes available
A systemic fungicide that will control plant diseases such as Pythophthora, downy mildew, pythium, black spot, root rot, anthracnose, and more.
10%
Off
Organocide Bee Safe 3-In-1 Garden Spray Concentrate Quick View
5 out of 5 stars (8)
On Sale!
$28.12
Was: $31.24
Free Shipping!
A OMRI certified fungicide and insecticide that kills all stages of soft-bodied insects and certain fungal diseases for lawns to gardens.
10%
Off
Fung-onil Multi Purpose Fungicide Concentrate Quick View
5 out of 5 stars (6)
On Sale!
$29.47
Was: $32.74
Free Shipping!
Multiple sizes available
A multi-purpose fungicide that controls leaf spots, rust, blights and more on roses, trees, shrubs and vegetables.
10%
Off
Hi-Yield Dusting Wettable Sulfur Quick View
4.5 out of 5 stars (6)
On Sale!
$20.61
Was: $22.90
Free Shipping!
Multiple sizes available
An insecticide and fungicide unique to roses, shrubs, flowers, fruits, and vegetables and may be used as a dust or a wettable spray on home lawns and gardens.
10%
Off
Bio Advanced All-In-One Rose and Flower Care Quick View
5 out of 5 stars (9)
On Sale!
$33.68
Was: $37.42
Free Shipping!
A liquid systemic 9-14-9 fertilizer, fungicide and insecticide that controls all the areas for Roses, shrubs and flowers.
10%
Off
Bio Advanced 3-in-1 Insect Disease & Mite Control Concentrate Quick View
4 out of 5 stars (5)
On Sale!
$28.22
Was: $31.35
Free Shipping!
Multiple sizes available
A systemic insecticide and fungicide that is rainproof with a 30 day protection from insects and diseases on flowers, shrubs and trees.
10%
Off
Ferti-Lome Fruit Tree Spray with Neem Py Quick View
4.5 out of 5 stars (10)
On Sale!
$29.48
Was: $32.76
Free Shipping!
Multiple sizes available
A multi-purpose Insecticide, Fungicide and Miticide for fruits and vegetables along with flowers, shrubs and turf-grass.
10%
Off
Strobe Pro G Granular Fungicide Quick View
5 out of 5 stars (4)
On Sale!
$89.98
Was: $99.98
Free Shipping!
A new professional fungicide with 2 active ingredients for a full spectrum of preventative and curative control of turf-grass diseases.
10%
Off
Myclobutanil 20EW T&O Fungicide Quick View
4.5 out of 5 stars (5)
On Sale!
$169.00
Was: $187.78
Free Shipping!
A professional systemic fungicide which provides curative and preventative control of fungal diseases in turf-grass, ornamentals and fruit trees.
4.5 out of 5 stars (7)
$100.90
Free Shipping!
A professional granular fungicide that controls commercial & residential turf-grass & ornamental diseases in greenhouses, nurseries, golf courses and interiorscapes.
10%
Off
Natural Guard Neem Oil Concentrate 70% Quick View
4 out of 5 stars (7)
On Sale!
$30.99
Was: $34.43
Free Shipping!
Multiple sizes available
A neem oil with fungicidal properties and insecticide that controls a list of insects.
10%
Off
CuPRO 5000 DF Fungicide Quick View
5 out of 5 stars (4)
On Sale!
$49.93
Was: $55.48
Free Shipping!
A professional fungicide and bactericide that controls diseases for ornamental plants.
10%
Off
Bio Advanced Fungus Control for Lawns - Granules Quick View
3 out of 5 stars (1)
On Sale!
$34.85
Was: $38.72
Free Shipping!
A fungicide that cures and prevents common lawn diseases systemically for up to 1 month with weatherproof protection and treats up to 5,000 sq. ft.
5 out of 5 stars (2)
$113.00
Free Shipping!
Multiple sizes available
A broad-spectrum fungicide combining two fast-acting active ingredients, boscalid and pyraclostrobin that effectively control many plant diseases while offering plant health benefits.
10%
Off
Ferti-lome F Stop Lawn and Garden Fungicide RTS Quick View
4 out of 5 stars (4)
On Sale!
$28.33
Was: $31.48
Free Shipping!
A ready-to-spray fungicide that helps prevent and control damaging plant diseases.
11%
Off
Prime Source PPZ 41.8 Select Fungicide Quick View
5 out of 5 stars (3)
On Sale!
$126.20
Was: $142.22
Free Shipping!
Multiple sizes available
A professional systemic fungicide containing propiconazole that is proven for turf, ornamentals and certain agricultural crops, and is cost-effective.
10%
Off
Prime Source Azoxy 50 WDG Fungicide Quick View
On Sale!
$138.00
Was: $153.33
Free Shipping!
A professional granular fungicide for the control of plant diseases in turf and ornamentals.
10%
Off
Mefenoxam 2 AQ Fungicide Quick View
5 out of 5 stars (2)
On Sale!
$139.00
Was: $154.44
Free Shipping!
Multiple sizes available
A professional water-based fungicide that provides a low odor and systemic control of root, stem, and foliar diseases.
10%
Off
OHP Triact 70 Quick View
On Sale!
$274.28
Was: $304.76
Free Shipping!
A professional OMRI fungicide, insecticide, and miticide in commercial landscaping, greenhouses and nurseries for shrubs, trees and ornamental plants.
10%
Off
Daconil Weather Stik Flowable Fungicide Quick View
On Sale!
$225.00
Was: $250.00
Free Shipping!
A professional fungicide that controls diseases on professional turf-grass and ornamental plants.
10%
Off
Bonide INFUSE Systemic Disease Control Quick View
5 out of 5 stars (1)
On Sale!
$24.90
Was: $27.67
Free Shipping!
Multiple sizes available
A systemic fungicide that provides both curative and preventative action for flowers, roses, shrubs, trees and lawns.
10%
Off
Hi-Yield Root Killer Quick View
On Sale!
$23.61
Was: $26.23
Free Shipping!
Multiple sizes available
A unique formula that quickly and economically kills roots and fungus that entered sewer pipes and septic tank drain fields.
10%
Off
Ferti-Lome Broad Spectrum Landscape and Garden Fungicide Quick View
On Sale!
$91.90
Was: $102.11
Free Shipping!
Multiple sizes available
A fungicide that controls diseases up to 14 days on vegetables, flowers, fruits and ornamental plants.
10%
Off
Tebuconazole 3.6F Foliar Fungicide Quick View
5 out of 5 stars (1)
On Sale!
$91.98
Was: $102.20
Free Shipping!
A professional fungicide for the prevention and control of fungal diseases on turf-grasses, field, nursery and container grown ornamentals, commercial and residential landscapes.
10%
Off
Manzate Pro-Stick T and O Fungicide Quick View
5 out of 5 stars (3)
On Sale!
$59.65
Was: $66.28
Free Shipping!
Multiple sizes available
A dispersible granular fungicide containing mancozeb which provides effective control of a wide range of plant diseases in turf and ornamentals.
5 out of 5 stars (1)
On Sale!
$144.56
Was: $154.44
Free Shipping!
Multiple sizes available
A professional wettable granular systemic fungicide that controls a wide range of plant diseases for preventative and existing conditions.
10%
Off
Bonide Rose RX Systemic Drench Concentrate Quick View
4.5 out of 5 stars (4)
On Sale!
$24.34
Was: $27.04
Free Shipping!
A fungicide and insecticide that protects plants, including new growth, against insects and diseases.
10%
Off
Bio Advanced Fungus Control For Lawns RTS Quick View
3.5 out of 5 stars (4)
On Sale!
$37.26
Was: $41.40
Free Shipping!
Multiple sizes available
Cures and prevents lawn diseases like read thread, brown patch, dollar spot, rusts, and others.
10%
Off
Ferti-Lome 2-N-1 Systemic Quick View
4 out of 5 stars (4)
On Sale!
$25.60
Was: $28.44
Free Shipping!
Multiple sizes available
An insecticide and fungicide that protects for up to 6 weeks on flowers and shrubs.
10%
Off
Fosetyl-Al 80 WDG Fungicide Quick View
On Sale!
$122.65
Was: $136.28
Free Shipping!
A professional water dispersible granular fungicide that provides root protection against a variety of turf, bedding plant and ornamental diseases.
10%
Off
Artavia 2 SC Fungicide Quick View
On Sale!
$59.98
Was: $66.64
Free Shipping!
Multiple sizes available
A long-lasting broad-spectrum fungicide that delivers preventive and curative control of plant diseases that can last up to 28 days.
10%
Off
Agrisel Chlorosel Pro 720 Fungicide Quick View
5 out of 5 stars (4)
On Sale!
$89.98
Was: $99.98
Free Shipping!
A professional fungicide that provides effective fungal disease control on turf-grass, ornamental plants and golf courses.
10%
Off
Bonide All Seasons Horticultural and Dormant Spray Oil Ready-To-Spray Quick View
3.5 out of 5 stars (3)
On Sale!
$25.40
Was: $28.22
Free Shipping!
A ready-to-spray fungicide, insecticide, and miticide in one product.
10%
Off
Enclave Flowable Fungicide Quick View
On Sale!
$326.82
Was: $363.13
Free Shipping!
A professional fungicide that provides control fungal diseases for commercial turf-grasses, golf courses, landscape ornamentals, greenhouses and nurseries.
10%
Off
Fertilome Triple Action RTS Quick View
3 out of 5 stars (1)
On Sale!
$47.42
Was: $52.69
Free Shipping!
Ready-to-spray insecticide, miticide, and fungicide in one product. Effectively prevent and control listed insects and plant diseases.
10%
Off
Daconil Action Flowable Fungicide Quick View
5 out of 5 stars (3)
On Sale!
$285.00
Was: $316.67
Free Shipping!
A professional fungicide for the control of turf diseases for sod farms, golf courses, athletic fields, and commercial and industrial buildings.
10%
Off
Southern Ag Garden Friendly Fungicide Quick View
4.5 out of 5 stars (5)
On Sale!
$14.03
Was: $15.59
Free Shipping!
Multiple sizes available
A bactericide and bio-fungicide that provides control of fungal and bacterial plant diseases for lawn & garden.
10%
Off
Bonide Infuse Lawn and Landscape Ready to Spray Fungicide Quick View
On Sale!
$33.20
Was: $36.89
Free Shipping!
A broad-spectrum systemic fungicide that protects ornamentals, lawns, trees, and shrubs against diseases with its ready-to-spray applicator.
10%
Off
Pageant TR Intrinsic Brand Fungicide Quick View
On Sale!
$49.25
Was: $54.72
Free Shipping!
Multiple sizes available
A professional aerosol fungicide for quick foliar disease control in commercial greenhouses and enclosed cargo areas.
10%
Off
Southern Ag Liquid Copper Fungicide Quick View
1 out of 5 stars (1)
On Sale!
$14.01
Was: $15.57
Free Shipping!
Multiple sizes available
Liquid fungicide which effectively controls fungal and bacterial plant diseases.
10%
Off
Natural Guard Horticultural Oil Spray Concentrate Quick View
5 out of 5 stars (1)
On Sale!
$20.39
Was: $22.65
Free Shipping!
An excellent fungicide, insecticide and miticide in one that is ideal for a wide variety of applications.
10%
Off
Garden Tech Daconil Fungicide Ready To Use Quick View
On Sale!
$23.17
Was: $25.74
Free Shipping!
A fungicide that kills and prevents more than 70 types of plant diseases for fruits, vegetables and flowers in a spray bottle.
10%
Off
Heritage TL Fungicide Quick View
On Sale!
$622.00
Was: $691.11
Free Shipping!
A professional broad spectrum fungicide that provides preventative and curative control of plant diseases for up to 4 weeks.
10%
Off
Junction DF Quick View
On Sale!
$141.76
Was: $157.51
Free Shipping!
A fungicide that controls a broad spectrum of foliar diseases in turf and ornamentals.
10%
Off
Spotrete F Fungicide Quick View
On Sale!
$192.59
Was: $213.99
Free Shipping!
A unique fungicide that effectively controls foliar diseases while protecting against rabbit, deer and rodent depredation.
10%
Off
Ipro 2 Fungicide Quick View
On Sale!
$241.59
Was: $268.43
Free Shipping!
A professional fungicide with the active ingredient of Iprodione 23% that controls diseases in turf, golf courses, greenhouses and nurseries.
10%
Off
Bonide Rose Shield Ready-To-Use Quick View
On Sale!
$17.93
Was: $19.92
Free Shipping!
A liquid fungicide insecticide that protects roses, flowers and landscape ornamentals against insects and diseases.
10%
Off
Talaris 4.5 F Fungicide Quick View
On Sale!
$219.00
Was: $243.33
Free Shipping!
Multiple sizes available
A professional broad-spectrum fungicide formulated as an easy-to-handle flowable that controls crop diseases.
10%
Off
Empress Intrinsic Brand Fungicide Quick View
On Sale!
$213.78
Was: $237.53
Free Shipping!
A professional fungicide that is designed for drench applications for protection of diseases on four root and crown pathogens for greenhouse and nursery growers.
$179.81
Free Shipping!
A professionally formulated granular fungicide to control certain diseases in turf, ornamentals, and nut trees in nurseries.
$288.00
Free Shipping!
An innovative solution that provides broad-spectrum disease control while also ensuring plant safety.
$209.75
Free Shipping!
A specially formulated flowable fungicide that controls diseases in professionally-managed turf areas.
10%
Off
Prime Source AzProp Select Fungicide Quick View
5 out of 5 stars (2)
On Sale!
$279.00
Was: $310.00
Free Shipping!
Multiple sizes available
A professional fungicide that prevents and controls pathogens from causing diseases on turf-grasses.
10%
Off
Prime Source Fluazinam 40SC Select Fungicide Quick View
On Sale!
$245.00
Was: $271.34
Free Shipping!
A professional fungicide that controls diseases in turf-grass only on golf courses.
10%
Off
Token SC Fungicide Quick View
On Sale!
$134.98
Was: $149.98
Free Shipping!
A rapid on-contact fungicide.
10%
Off
Transom 4.5 F Fungicide Quick View
On Sale!
$243.00
Was: $270.00
Free Shipping!
A liquid flowable systemic turf and ornamental fungicide that provides broad-spectrum control of plant diseases.
10%
Off
Gravex 20 EW Fungicide Quick View
On Sale!
$35.77
Was: $39.74
Free Shipping!
Multiple sizes available
A systematic fungicide that cures and prevents diseases.
$27.97
Free Shipping!
Multiple sizes available
An all-in-one insecticide, fungicide, aphicide, miticide, scalicide, and spreader sticker.
10%
Off
Celoxid SC Fungicide Quick View
On Sale!
$109.00
Was: $121.11
Free Shipping!
Multiple sizes available
A long-lasting liquid fungicide used for turf and ornamental disease prevention and control.
10%
Off
Gunner 14.3 MEC Fungicide Gallon Quick View
On Sale!
$99.98
Was: $111.09
Free Shipping!
Multiple sizes available
A versatile fungicide that can withstand all seasons.
$25.54
Free Shipping!
A fungicide formulated to control and prevent diseases on turf, bedding plants, foliage plants, and ground covers.
10%
Off
Stergo MX Fungicide Quick View
5 out of 5 stars (1)
On Sale!
$129.00
Was: $143.33
Free Shipping!
Multiple sizes available
A broad-spectrum preventative fungicide that targets diseases while protecting plants in all weather conditions.
10%
Off
Postiva Fungicide Quick View
On Sale!
$109.00
Was: $121.11
Free Shipping!
A professional grade fungicide for tough fungal disease treatment and prevention.
10%
Off
Dornic 720F Fungicide Quick View
On Sale!
$134.99
Was: $149.99
Free Shipping!
Multiple sizes available
A contact fungicide that prevents ornamental and turf diseases.
10%
Off
Dornic 720F Fungicide Quick View
On Sale!
$134.99
Was: $149.99
Free Shipping!
Multiple sizes available
A contact fungicide that prevents ornamental and turf diseases.
10%
Off
Prime Source Propam Select Fungicide Quick View
On Sale!
$313.28
Was: $348.09
Free Shipping!
A preventative fungicide used for controlling and damping-off Pythium blights, root rot, and Phytophthora.
$130.91
Free Shipping!
A water-soluble, non-phytotoxic soil application that effectively protects against a wide range of common soil-borne and foliar diseases.
$24.80
Free Shipping!
Multiple sizes available
A natural insecticide that kills a broad spectrum of insect pests at any life stage, including eggs.
$450.00
Free Shipping!
A systemic fungicide formulated to prevent and control diseases common to turfgrass on golf course turf only.
10%
Off
Detour 4 SC Fungicide Quick View
On Sale!
$1,079.99
Was: $1,199.99
Free Shipping!
A powerful fungicide that has a superior control of dollar spot and helps in resistance management.

Lawn & Garden Safe Fungus & Disease Control Products

Fungicides have long been part of disease management in gardens, greenhouses, and lawns. In do it yourself lawn care, lawn diseases and garden diseases can be difficult to control and get rid of, and fungus-based diseases are no different. Since it can be tricky, knowing more about fungicides, how they work, and how to use them can help you choose the best product for your needs. Read our guide on how to use fungicides to learn more about choosing and applying a fungicide.

To take the guesswork out of preventing disease in your lawn, check out our new lawn box subscription program. 

Here are the top five lawn diseases and how you can identify, inspect for, treat, and prevent them:

Fungicides for Disease Control

Fungicides are chemicals or ingredients that inhibit the growth of fungi on plants. There are many different active ingredients that help to achieve control, and different ingredients will work for certain plants and certain diseases. The types of diseases fungicides control include rots, spots, and rusts, among others and you can use fungicides to treat lawns (turf & grass), gardens, and other plants, even indoors. Fungicides only help manage some plant diseases and will only work on infectious plant diseases if the disease is truly caused by fungi. 

Types of Fungicides

Fungicides come in a wide variety of applications, from liquids to granules and organic to commercial and can be systemic or contact. 

Systemic Fungicides: A type of fungicide that moves through the plant to provide post infection treatment. Not all systemic fungicides will flow through the entire plant; some will only treat certain parts.

Knowing that there are different kinds of fungicides, it can be difficult to choose the right product for your needs. There is a long list of chemical ingredients to control fungus. Natural or organic formulations commonly contain sulfur, copper, oils, and bicarbonates as the active ingredient:

  • Sulfur is commonly used to prevent powdery mildew, black spots, and rusts and must be applied as a preventative. 
  • Copper can damage plants but a copper sulfate with lime mixture (Bordeaux mixture) makes it safer for plants as well as working as an antibacterial. 
  • Horticultural oils are commonly used for insect control, and controlling insects can prevent the spread of diseases carried by aphids and other pests. 
  • Bicarbonates (baking soda) have been used for many years and are very effective when combined with oils.

Using Fungicides

The most important part about using fungicides is choosing the right one for both the disease you need to treat and the plant with the disease. Identifying the plant disease can be very difficult. If you’re not sure, contact your local extension office or master gardener for help. The product must be applied at the right time of year and frequently enough to see results. Using the wrong product could result in the disease being left untreated or damage to the plant. Keep these things in mind when using a fungicide:

  • Always check the product label to ensure the plant you wish to treat is listed.
  • The rates and doses listed on the product must be followed. If the product is not working, do not increase the dose or rate; you may have chosen the wrong product and over-applying will damage the plants. 
  • Fungicides are very effective preventatively. Once the pathogen has entered the plant tissue, it can be very hard to get rid of it.
  • Many formulas are contact fungicides, which means they will only protect what it has come in contact with. You must ensure the entire surface of the plant has been treated with the product. Any time the product degrades or the plant outgrows the application, the plant is no longer protected.
  • You will most likely have to reapply the fungicide in 7-14 day intervals over the growing season due to weathering and chemical breakdown.

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