7 Best Fungicide for Tomatoes 2022 [Reviews & Guide]

Do you know how many pests and diseases have been identified in tomatoes? And more than 200 and fungal diseases are the most destructive of these. According to the previous statistic, fungal diseases cause of about 20-70% economic loss of tomatoes in a year.

Powdery mildew, Anthracnose fruit rot, Early blight, Septoria leaf spot, Late blight, Damping-off and Root rot, Fusarium wilt, and Buckeye rot are the most common and destructive fungal diseases of tomato.

You know prevention is better than cure. It is more applicable in the case of tomato fungal diseases. Because you can only save the plant if you see the sign of fungal infestation at the early stage. It will be late to save the plant if the terminal sign appears on the tomato plant.

That’s why you should apply a fungicide before any symptoms appear to keep your tomato plants healthy and diseases free. But the burning question: what is the best fungicide for tomato plants?

In short, the organic or inorganic type of fungicides that contain copper, myclobutanil, neem oil, chlorothalonil,Bacillus subtilis, mancozeb, and other fungus killing active ingredients.

Today I will give you a list of the best fungicide for tomato plants. Additionally, you may also learn the tomato fungicide spray schedule and user guide of fungicide.

So let’s explore more-

In a hurry? Here is the overall best copper fungicide for tomatoes that you can buy right now-

Best Fungicide for Tomatoes- Comparisons

Bonide 811 Copper 4E FungicideConcentrationOrganic
Southern Ag - Copper Fungicide ConcentrationOrganic
Garden Safe Brand Fungicide3Ready to useOrganic
Spectracide 100507462 Immunox ConcentrationSynthetic
Serenade Garden AGRSER32ConcentrationOrganic
Daconil Fungicide -100523634ConcentrationSynthetic
Bonide - Mancozeb Fungicide ConcentrationSynthetic

Best Fungicide for Tomatoes-Reviews

1. Bonide 811 Copper 4E Fungicide 16oz (473ML) – Best For Early Blight of Tomato

Bonide 811 Copper 4E Fungicide 16oz (473ML)
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Bonide 811 Copper fungicide is the most effective to prevent and control the early blight of tomato. Besides, it helps to control and prevent late blight, powdery mildew, downy mildew, white and black spot, gray mold, anthracnose, and other fungal diseases.

It can also control the fungal disease of roses, fruits, vegetables, herbs, ornamentals, turf, and greenhouse. Also, it can prevent some insects (whiteflies) and bacterial diseases (e.g: Bacterial Blights, Bacterial leaf spot, Bacterial Stalk Rot)

This liquid fungicide contains 10% copper octanoate or copper soap as an active ingredient. Copper spray is an organic chemical that doesn’t harm the plants. Moreover, it is an OMRI-listed organic fungicide.

Mix 15-60 ml fungicide concentration with 1-gallon water and spray on the plant foliage before the disease appears or when the first sign appears. You may also pick ready-to-use Bonide Products INC 775 Copper Fungicide(no need to mix water).

It is mainly a preventive fungicide but also acts as a curative fungicide if it applies in the early stage of infestation. Read the label for directions.


2.Southern Ag Liquid Copper Fungicide 16oz 1 Pint– Best for Tomato Blight

2. Southern Ag - Liquid Copper Fungicide - Fungicide, 16oz
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If you need the best tomato blight (early and late blight) spray, this Southern Ag liquid copper fungicide can be best suitable for your tomatoes. It is also efficient enough to prevent other fungal and bacterial diseases like downy mildew, septoria leaf spot, wilt, black spot of tomato, cucumbers, melons, citrus, other vegetables, and ornaments.

The active ingredient of this fungicide is the Copper diammonium diacetate complex that is equivalent to 8% metallic copper. Almost 0.772 lbs copper present in per gallon fungicide concentration. That increases the antimicrobial properties of this fungicide.

How to use Southern Ag fungicide on tomatoes?

It is 1 pint (16 ounces) liquid concentration. Mix 4-6 tablespoon (2-3 oz.) of concentration in 1 gallon of water per 1000 square feet. Pour the solution into a sprayer and apply it on the leaves of the tomato plants to prevent and control fungal diseases.

You may use the fungicide solution for vegetables, flowers, and ornamental plants. You should read the label for specific information and directions before applying.


3. Garden Safe Brand Fungicide3 –Best for Tomato Powdery Mildew

Garden Safe Brand Fungicide3, Ready-to-Use, 24-Ounce
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Do you know why fungus spread so fast to healthy plants? The insects are responsible for this. Insects carry fungus spores and other causal organisms from affected plants. How about if you can kill both tomato fungus and insects with an organic product?

Good news!

Garden Safe Brand Fungicide3 comes with triple-action plant protection; acts as a fungicide, insecticide, and miticide. This OMRI listed organic tomato fungal disease control spray can help to get rid of powdery mildew, rust, black spots, anthracnose,  blight, and other fungal diseases of the tomato plant as well as killing aphids, scales, caterpillars, beetles, whiteflies, mealy bugs,  spider mites and so on.

It contains 0.9 % neem oil extracts and 99.1% other ingredients that the manufacturers not identified. Another best part of this fungicide is that it can also apply to the house plant. It has no harsh chemical smell. But fungicide may damage furniture.

It is ready to be used as a fungicide. No needs to add water to the solution. Shake well and spray the top to bottom of the tomato or other plants until the plant is completely wet.


4. Spectracide 100507462 Immunox Fungicide –Best for Downy Mildew

Spectracide 100507462 Immunox Multi-Purpose Fungicide Spray Concentrate, 16 fl oz
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Spectracide fungicide is another best fungicide for tomatoes. Why I am telling you that? Of course some reasons behind it.

It contains myclobutanil triazole chemicals that can control a wide range of fungal infestation. If there is enough risk of attack fungus and see the epidemic primary sign of fungal diseases on tomato plants, it may the right choice for you.

It can prevent and cure the brown patch, blight, powdery mildew, black spot, rust, and other fungal diseases of tomato, grapes, roses, flowers, trees, ornamentals, vegetables, lawns, shrubs, nuts including most of the outdoor plants.

Another best part of this fungicide-

It is a rainproof fungicide. Most of the fungicide can’t work it rains after spray.  But Spectracide 100507462 Immunox Multi-Purpose Fungicide can’t wash off if it dries once after spray.

Want to know the worst part of this fungicide?

It is not an organic fungicide. The active ingredient “myclobutanil” is a very effective but toxic chemical for nature. If you don’t any objection to the semi-organic or chemical product, pick this one. Must wear musk before apply and don’t apply on harvestable tomatoes.

According to the spectracide fungicide directions label

Mix 2 tablespoon Spectracide concentrate with one gallon of water and apply on the tomato plants.


5. Serenade Garden AGRSER32 Organic Fungicide–Best for Tomato Wilt

Serenade Garden AGRSER32 Disease Control Effective Organic Fungicide, 32-Ounce, OMRI Listed
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Serenade Garden AGRSER32 is the best organic fungicide for tomato wilt. It is the most effective fungicide to prevent and control fusarium and verticillium wilt of tomatoes.

Wait – there’s more!

It can also effective to prevent other fungal and bacterial diseases (see the list on amazon) of vegetables, flowers, houseplants, foliage, and trees.

Bacillus subtilis is the active ingredient of this fungicide. It is a gram-positive, motile bacteria that used as a bio fungicide.  Also, it may use to produce fertilizer and antibiotics.

Mix 2 tablespoons of concentration with 1-gallon water and spray on the tomato foliage. Also ready to use solution available on amazon.

If you grow and culture tomato in an organic way, it is highly recommended for you. This fungicide also OMRI listed products for organic gardening.


6. Daconil Fungicide Concentrate–Best for Septoria Leaf Spot of Tomato

Daconil Fungicide Concentrate 16 oz. - 100523634
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This USA made fungicide helps you to get a diseases free plant in 3 ways; it can control, stop and prevent almost 80 plant diseases including early blight, late blight, powdery mildew, grey leaf spot, gray leaf mold, black mold, anthracnose, fruit rot, botrytis gray mold of tomato leaves.

It contains 29.6% chlorothalonil as an active ingredient. Many gardeners claim that chlorothalonil is not safe. Good news; It is marked as safe by the United States Food and Drug Administration (only when consumed in a small amount) but it is not organic.

Thereafter, for your safety, you should wear a mask, gloves during apply.

You might happy to know-

It is a non-systemic fungicide for vegetables. That means plants don’t absorb the chemical. It has a disadvantage too. Rains may wash the solution easily.

Mix 1 tablespoons fungicide concentration into 1-gallon water. Pour the solution into a sprayer and apply entire surfaces of the tomato plants to prevent and treat fungal diseases. This dosages will be okay for most of the vegetables but read the Daconil fungicide label to learn specific dosages.


7. Bonide (BND862)Mancozeb Fungicide Concentrate–Best for Tomato Leaf Spot

Bonide (BND862) - Fungal Disease Control, Mancozeb Flowable with Zinc Fungicide Concentrate (16 oz.)
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Last but not least, let me introduce another best garden fungicide for tomato. Bonide (BND862) – Mancozeb Fungicide has a wide range of use against tomato pests.

It contains Mancozeb which is a zinc-based fungicide. Mainly zinc is the active ingredient of this fungicide. You may happy to know that zinc is essential nutrition for healthy plants.

This broad-spectrum mancozeb flowable with Zn fungicide can mostly effective to treat leaf spot, downy mildew, early blight, late blight, rust on tomato leaves, and botrytis of outdoor crops. It is also a suitable fungicide for integrated pest management (IPM).

To prevent fungal diseases of tomato-

Mix 1 to 2 tablespoons of fungicide concentrate into 1-gallon water and apply when seedlings emerge or transplanted seedlings are set.


Most Common Fungal Diseases and Treatment

The most common tomato fungal diseases are three types of tomato blight; early blight, late blight, and septoria leaf spot. Including these, I will tell you some other fungal diseases of tomato that you must know-

#Early Blight of Tomato (EBT)

Early blight of tomato
Sign of early blight

Tomato foliage and fruits are mostly affected by EBT. It caused by two fungi named Alternaria tomatophila and Alternaria solani. Circular irregular black or brown spots appear and the stems will turn brown and dry. Fruits may also be affected at any stage. Affected fruits petal end rot and drop from the plants.

Want to know;

How to get rid of blight on tomato plants?

Keep reading and you’ll find out.

#Late Blight of Tomato (LBT)

Late blight of tomato
Sign of late blight

Late blight is caused by Phytophthora infestans that also called water known water mold. Phytophthora infestans develop in low temperatures (12-5 Celsius), high humidity (above96%), and cloudy, damp, drizzling weather.

Leaves appear large dark brown indefinite patches and blotches with a green-gray edge. Fruits also affected and show brownish rotted spots on the skin. In epidemic conditions, leaves dry and white powdery mildew to develop on the leaves and stems.

#Septoria Leaf Spot of Tomato

Septoria Leaf Spot of Tomato
Sign of septoria leaf spot

It caused by a soil-borne fungus (Septoria lycopersici) that only affects the plant leaves and stems. The 1/16 to 1/8 inches small spots first appear on the undersides of older leaves with dark brown margin and white or gray center.

Without proper treatment of septoria leaf spot, leaves will turn yellow and fall off.

#Powdery Mildew of Tomato

powdery mildew on tomato
Sign of powdery mildew

Powdery mildew of tomato is caused by the fungus Oidium lycopersicum. It is the most quick-spreading fungus disease of tomato. Fuzzy white yellowing, desiccation, necrosis spots on tomato leaves, fruits, and stems may the sign of the powdery mildew of tomato.

#Fusarium wilt of Tomato

Fusarium wilt of tomatoes
Sign of fusarium wilt

It is caused by the fungus Fusarium oxysporum f. sp. lycopersici. The older leaves are become droopy and curl down. Stems and roots appear in a brownish color. The leaves of one side turn yellow first, Lastly the all the leaves turn yellow and plant die.

#Anthracnose Fruit Rot of Tomato

Anthrancnose of tomato
Sign of anthracnose

Anthracnose is caused by the soil-borne fungus. It only damages the ripe tomato fruits. The circular water-soaked spot appears on the mature tomato. The spot became large slowly and, blackish center on the spots.

You can eat tomatoes with anthracnose. Just cut off the affected portion and eat the rest of the fruits.

#Buckeye Rot of Tomato

Buckeye Rot of Tomato
Sign of buckeye rot

It is caused by Phytophthora parasitica that can affect both mature and immature tomatoes. Brownish-black lesions with definite concentric appear on the fruits.

Tomatoes Fungal Diseases Treatment

How to get rid of the septoria leaf spot? Or what is the treatment of anthracnose? All are the most asked questions today. Want to know the answer?

Here is your deal-

Remove and destroy all the affected plants’ parts from the garden and apply the best plant fungicide without any delay. Repeat application after 7-10 days till the fungal sign disappears.

How to prevent Fungal Diseases of Tomato?

Pick a fungicide and spray after the seedling emerges or transplanted seedling is set to prevent fungus development. You can pick a fungicide from my list. All the fungicides are effect all the common tomato fungal diseases. If you want to buy the best fungicide from your nearest pesticide shop, you should consider a few things that I have mentioned below.

Some other rules you may follow to treat and prevent fungus development-

  • Crop rotation may the best preventive treatment.
  • Prune the plants that they get enough light an air.
  • Water only to the soil, wet foliage can develop fungus.
  • Don’t overfertilize and overwatering to the tomato plants.
  • Don’t allow to move in the tomato garden after when the soil is wet.
  • Remove and destroy affected plant as soon as possible.
  • Grow resistant tomato varieties. Here is the list of a few resistant tomato varieties
Early Blight ResistantLate Blight ResistantAnthracnose Resistant
Mountain Supreme LegendAbraham Linkon
Mountain FreshMountain MagicBeefmaster
Iron LadyIron Lady Better Boy
LegendMountain MeritChampion 2
JulietPlum Regal Jelly Bean
JasperJasperMountain Magic
Plum DandyDefiant PhRLemon Boy

*All the verities have other disease resistance capabilities.

How to Choose the Best Fungicide for Tomatoes

You must consider a few points before selecting the perfect fungicide for your tomatoes. What are these points?

Let’s have a look;

Active Ingredients

What is the type of fungicide? Is it organic or synthetic? If you want to know all the questions, you have to know what the active ingredient of the fungicides is.

Two types of organic fungicides found in the market today.Biological fungicide and Copper fungicide.

Biological fungicide contains beneficial bacteria or fungi to fight against fungus. Bacillus subtilis is the active ingredient of the bio fungicide. Serenade Garden AGRSER32 is one of the best bio fungicides.

Copper fungicide contains copper octanoate, copper soap, or copper sulfate as an active ingredient. Copper is one of the important trace element for human health. It is completely safe for humans and pets. Bonide 811 is one of the best copper fungicides today.

Now, what is the active ingredient of chemical fungicide?

Chemical fungicide contains chlorothalonil, mancozeb, maneb, captan, and myclobutanil. This chemical is super-efficient as a fungicide. But all are toxic to animals, pets, and nature. Mancozeb is less toxic than others. So I would like to recommend mancozeb contain fungicide if you want to buy the best synthetic fungicide.

Certified or Non-certified

Another point you must consider that the organic fungicide is certified by OMRI(Organic Materials Review Institute) or NOP(National Organic Program).OMRI and NOP are the non-profitable organic product review organization. They determine and certify the product as organic.

Preventive vs. Curative

Preventing fungicide can prevent fungal diseases and Curative fungicide can stop developing fungus after infection. Most of the fungal spray good at preventing fungus.

All the information you can be found on the label of fungicide. (Read more: What you need to know about reading a pesticide label)

FAQs on Tomato Fungicide

#How to know if you should use fungicide on tomato plants?

If the weather is hot and humid or wet and damp for a few days and your neighbor plants have been attacked by the fungus, you should apply a fungicide to your tomato plants. Forget all those things, just remember you have to apply fungicide before the development of the diseases.

So, For being safe, apply fungicide after seedling emergence.

#What is the best time to apply fungicide on tomato plants?

The fungicide may burn your tomato plants when you apply it to the full sun. To minimize the leaves’ burn, apply a fungicide when plants are shaded. Some gardeners recommend applying fungicide in the early morning or late evening.

But this is not the perfect time. The temperature remains low in the early morning and early evening. Moreover, Plant may spend overnight wet with the fungicides if you apply in the early evening. That is harmful to the plant.

So, early evening is the best time of day to apply fungicides on tomato plants, when the temperature remains low and fungicide get enough time to dry before nightfall.

#How to use fungicide on plants?

All the manufacturers provide the fungicide with a specific direction. So you should follow the direction to use a fungicide. It is not only for chemical fungicide. Even bio-fungicide may harm your plant if you apply too much.

Pour the fungicide solution into a sprayer (our pick: Chapin 20000, 1 Gallon Sprayer) and spray the plant until it wets completely.

#How much and how often should you apply fungicide on tomato?

The manufacturers provide a recommended dosages and directions with the fungicides. You should follow the recommended dosage.

Mix 2 tablespoon of fungicide concentration into 1-gallon water. This is the common recipe for tomato plants that may follow almost all the fungicides.

Apply the fungicides once in a week until the fungal disease is no longer present. If rains re-apply.Repeat the process after 7-10 days interval.

#How to make fungicide for the tomato at home?

There are many antifungal products at your home. You can use those products for making homemade natural fungicide for tomatoes blight, black spots, and other fungal diseases. Here are some gardener’s choice fungicide recipes-

Recipe-1: Baking soda fungicide for tomatoes

Mix 1 teaspoon baking soda, 1 tablespoon liquid dish soap, and 1 tablespoon vegetable oil with 1-liter water. Shake it well. Boom! your DIY tomato blight fungicide is ready. Just shake and apply the solution to treat and cure tomato.

Recipe-2: potassium bicarbonate fungicide

Mix 1 tablespoons of potassium bicarbonate, 1 tablespoon of vegetable oil, and few drops of natural liquid soap with 1-liter water.

Recipe-3: Vinegar

Mix 1-2 tablespoon of vinegar with 1-liter water. Shake and get a homemade fungicide.

Note: Sometimes plants can’t tolerate homemade fungicide because of the wrong concentration. So, do a test before applying.

#How to treat the soil(soil treatment) after tomato blight?

  1. Remove all the plant’s parts and residues from the garden including plant roots, fallen tomatoes.
  2. Destroy and throw them far away from the garden.
  3. Spread the soil and increase the aeration.
  4. Cover the soil with greenhouse plastic.

You can also follow Recipe-1, prepare a solution, and apply on the soil to kill the soil-borne fungus.

The best idea is to get rid of blight. Plant your tomatoes in the right tomato planter filling with the perfect potting mix that is free from diseases.


I hope you can now pick the fungicide for your tomato. I have reviewed here all the best tomato fungicides and discussed the relevant queries.

Lastly, I would like to tell you, apply tomato plant fungicide or remedy, if there is a little chance to develop fungus.

If you have any suggestions and quires, leave a comment below.

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