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Garden Naturals

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Disease Control


Always read and follow label directions.


Q. What is a fungicide and what does it do?

Fungicides are a type of pesticide, a chemical compound, which prevents and controls diseases on plants.


Q.  What is the difference between a contact and systemic Fungicide?

A.Contact fungicides remain on the outside of the plant and form a protective barrier against diseases that penetrate the tissue. Contacts will not have any effect on diseases that enter through the root system.


Systemic fungicides enter inside the plant and travel throughout the plant's vascular system. They are both protective and curative before and after the disease has started. Any disease that enters from any point on the plant will be subject to the systemic fungicide, this includes any new plant growth.


Both systemic and contact fungicides are often alternated to get the benefits of both types of fungicides.



Q. I have a white powdery substance on my plants, what is it?

A.Most likely, the plant has powdery mildew.  Contact your local cooperative extension or nursery for diagnoses.  Spray with an appropriate fungicide that lists on the label the disease and the type of plant.  Check out the following product labels for recommendations; Copper Fungicide, Liquid Infuse, Neem Oil, All Seasons or Sulfur Plant Fungicide.


Q. I applied a fungicide to my shrubs, trees, flowers and it rained the next day. Do I need to reapply?

A. Rain does not affect systemic fungicides, such as Bonide’s Infuse Systemic Disease Control, as long as the product had sufficient time to dry before it rains.  Systemic fungicides are absorbed into the plant tissue and roots so they will still be effective after they dry and it rains.  If applying a contact fungicide check weather conditions to avoid spraying when rain is expected. You do not want rain to wash off a contact fungicide you have just applied. You can reapply but must wait the recommended reapplication interval (i.e. if the label states apply in 7 to 14 days then you should reapply in 7 days).


Q. I have insects as well as fungus on my plant. Can I mix an insecticide with the fungicide?

Only if the product label specifically states that two products may be mixed together.  Please consider using products that are already formulated for both insect and disease control like All Seasons Oil, Bon-Neem, Citrus Fruit & Nut Orchard Spray, Dragoon Dust, Fruit Tree & Plant Guard, Fruit Tree Spray, Garden Dust, Neem Oil, Tomato & Vegetable 3 in 1, Rose Rx 3 in 1, Rose Shield or Rose Rx Systemic Drench, instead of mixing.

Q. My plants have blight. What should I do?

A. Contact your local nursery or cooperative extension for help in properly diagnosing the type of blight you have.  Next, select a fungicide that lists that type of blight with the plant variety you are applying the product to.

Q. Which fungicide can I use to get rid of mushrooms in my lawn?

A. Mushrooms in lawns are a result of dead decaying wood in your lawn. Fungicides will not get rid of them. The only way to get rid of them is to get rid of the wood source.

Q. What product is best to use on my Rosesfor powdery mildew and black spot?

A. Please consider the use of the following products that are recommended for roses; Rose Shield, Rose Rx 3 in 1, or Rose Rx Systemic Drench.



Garden Naturals

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