There’s a common disease called black rot of onions caused by the fungus Phythium spp., which can be a problem for onion growers. The fungus reduces both quality and yield. Fortunately, there are certain fungicides that can help manage this disease. This is part one of a two-part series on possible products and techniques to use to control black rot on onions – stay tuned for part two next week! There are a variety of diseases that can devastate your crop, causing loss of yield and even death. Your first line of defense is using a fungicide to prevent the spread of disease. There are many types of fungicides, each with specialized properties that work best for specific situations. One such type of fungicide for onions is a soil drench or foliar spray. So you’ve got your onions potted, and you’re ready the transplant them but this is when an irksome battle may begin. If you’re not careful, once you transplant your onions, you may end up with leaf spot or rot. If this is the case, some fungicide for onions may be in order. How do you keep your onions free from disease? You may have heard of fungicide but don’t know what to choose and where to apply it. The article provides details on the best fungicide for onions along with highlights on some conventional/organic fungicides. Let’s get into it!

Best Fungicide For Onions

Introduction

Fungicides are pesticides that target fungal disease. They work to kill the fungus or inhibit its growth. Onions can have all sorts of problems that you might need a fungicide for, but it’s also important to make sure you’re using a fungicide safely, so check out our tips on how to use them before you get started spraying.

Why onions can be problematic

Onion plants are susceptible to several diseases. A number of fungal diseases can affect them, as well as bacterial and viral infections. Insect-borne diseases can also occur in onions. In this article, we’ll discuss the most common disease types that affect onions, and offer tips for preventing them or treating them if they do occur.

Diseases caused by fungi include neck rot (Phyllosticta porri), brown root rot (Rhizoctonia solani), black scurf (Alternaria porri), leaf spot (Cercospora spp.), purple blotch/purple senescence leaf spot (Alternaria porri) and gray mold caused by Botrytis cinerea among others.

Bacterial diseases include pink root disease which is caused by Pseudomonas solanacearum; bacterial leaf scorch caused by Xanthomonas campestris pv vesicatoria; soft rot due to Erwinia chrysanthemi  and pink eye which is a secondary infection of brown spot on onion seedlings due to Rhizoctonia solani

What is a fungicide?

A fungicide is a chemical that kills fungi. Fungicides can be used to prevent disease or treat existing problems. Fungicidal sprays are available in different forms, including wettable powders and emulsifiable concentrates. The active ingredient of a fungicide can be organic or synthetic—so it’s important to know whether you’re buying an organic or synthetic product when shopping for onions fungicides.

Fungicides are often used preventively as part of a pest management plan on farms and gardens, where they may be applied prior to planting fields with onions to prevent fungal growth during the growing season, which helps keep yields high while reducing costs associated with treating diseased plants after they’ve been planted (and before they produce). Organic farmers have specific regulations regarding when and how much pesticide should be applied; nonorganic farmers may also find it helpful to follow these guidelines so as not to harm their crops by overusing chemicals that could damage them chemically instead of physically killing off unwanted pests such as fungus/fungi.

Safer fungicide

You should also avoid using fungicides that are not labeled for onions. For example, some fungicides may be labeled for use on organic crops but not food crops. If you have questions about the safety of a particular product, consult your local Cooperative Extension Service or other farm advisor before applying it.

In addition to looking at the label and finding out if it’s okay to spray on onions, check that it is safe to spray near edible plants like potatoes or tomatoes; then make sure you follow all other instructions on the label carefully.

How fungicides work

Fungicides are chemicals that kill fungus. They are used to protect plants from disease, and can be sprayed on the plant or sprayed in the soil. Fungicides are used to prevent and treat various plant diseases such as downy mildew, rusts and powdery mildew.

How to apply fungicide

If you’re going to use a fungicide on your onions, it’s important to know how to apply that fungicide properly. Fungicides can be sprayed directly onto the soil, onto leaves and bulbs, or even onto seeds and seedlings.

Apply fungicide before and after planting onions.

• Apply fungicide before planting onions.
• Apply fungicide after planting onions to the soil, leaves and bulbs.

Conclusion

In the end, it really just comes down to the fungicide you choose. I recommend using a trusted brand that is known for producing high quality products. This is important because it means that you are getting a good product and not wasting your money on something that won’t work. If you decide on a cheaper option then make sure to follow all directions carefully as they can be harmful if used incorrectly.”