How to get rid of downy mildew on basil?

Basil, a common herb, is widely used in the kitchen due to its slightly peppery and sweet flavor, making it a favorite among many. It is renowned for significantly influencing the taste of tomatoes when both plants are grown in proximity. Basil also serves as an excellent companion for plants such as oregano, eggplants, and peppers, while effectively repelling mosquitoes, flies, and thrips. Dealing with downy mildew on basil requires constant preparedness as it can be quite dangerous.


What causes downy mildew on basil?

Downy Mildew on basil is usually caused by a fungus known as Peronospora belbahrii. This pathogen prefers cool and humid conditions. It loves to spread through contaminated soil, seeds, and water. This usually has microbiological interaction between this fungus and basil plant. It creates spore-bearing structures while spreading the disease. Do you want to know how to cure downy mildew on basil? Then this is a post for you!

Can you revive a wilted basil plant?

How to get rid of downy mildew on basil? Are you having doubts that the basil is affected by downy mildew? Well, this is something that you need to worry about because this is a very contagious disease and mostly comes without solid warning. It can easily transmit through spores that are usually not visible. Basil can even be blown by the wind and also get carried with hands, tools, or clothes. It can travel even with a splash of water! 

In this article, we are going to discuss how to deal with this disease and also learn more about it. It can answer most of the common questions you have in mind regarding basil downy mildew. Are you worried about how to prevent downy mildew on basil? Well, here in this article you can get the solution for that.

How to get rid of downy mildew on basil?

Cultural practices

Getting rid of downy mildew is tough if you do not use the correct methods. There are many practices that have been running for quite a time. Reducing relative humidity and moderating it in the greenhouse is one of the most popular methods. The gardeners and farmers of basil plantations prefer to keep the moisture at a range of less than 85 percent.

It ensures that the sporulation scope decreases significantly. Sometimes, when this method does not work, farmers prefer to interrupt the dew cycle. The fanning or venting option every 2 hours to 4 hours helps to decrease the spore production. Treating downy mildew on basil cannot be easy if you are not consistent enough.

How to prevent downy mildew on basil through cultural practices?

Controlling using light also helps to keep the infected plants under check, as a few research works these days are suggesting. It is tough to sporulate if the plants are supported 24 hours under the light. It mostly depends on light temperature, too. The incandescent lamp, if fully inhibitory at around 15 degrees Celsius to 25 degrees Celsius, is the best type of lighting. Research works also have shown that when it comes to LED illumination, red light is more inhibitory as compared to blue light.

You can light up the garden where you have planted basil during the night for nearly 10 minutes every few hours, which can help you decrease the scope of sporulation very quickly.

Continuous fanning is one of the best methods as it helps to decrease the leaf wetness and reduce BDM development. It keeps the relative humidity well below 95 percent usually. You can use this cultural practice with a combination of the other cultural practices mentioned in this part to get the best results. You need to have additional hardware for the fanning method. Sometimes, BDM can be due to seeds, and that can be the new seeds you just bought from the market. Always stay away from roots with diseases.

Chemical insecticide

Many people believe that the best way to handle downy mildew on basil is to use conventional chemical insecticides, which may be harmful but quite productive in the short run. Fungicide for downy mildew on basil can be helpful. If you utilize them just after catching the symptoms of basil downy mildew, then you can treat it quickly before it spreads and destroys the other crops. 

K-Phite, Fungi-phite, Prophyt, Revus, Ranman, and Quadris are pretty effective against this horrible disease. Quadris is suitable for field use only among all these materials and is not effective in the greenhouse. K-phite, Fungi-phite, and Phrophyt are phosphite fungicides that also effectively combat other mildew-related diseases.

Biological ways

How to prevent downy mildew on basil without affecting the environment? In that case, the highly preferred method for treating basil downy mildew is the biological approach. Penicillium bilaiae is a widely used bacteria known for its ability to solubilize phosphate in agriculture, making it an eco-friendly option. It is not only effective in fighting this horrible disease but also helps with plant growth and uptake of phosphorus in many crops, including basil. Phosphorus plays a vital role in plantation growth, but it stays least mobile. Due to its reduced mobility, the plants can only find it in the soil. Soybean inoculation plays a good role in the global cycle of phosphorus.

Cropium: A simple magic to cure downy mildew on basil plant


Cropium is a fantastic product by Novobac that uses Penicillium bilabiate as its active ingredient in the fungicide for downy mildew on basil. It is the best soil fungus that is found naturally in the soil and is developed to fight against most soil-related diseases. Chromium uses this fungus to treat fusarium wilt and verticillium wilt. It helps to promote the health of the plants by helping to tolerate abiotic stress along with maintaining solid roots. 

Novobac, as a manufacturer, is quite reliable when it comes to sustainable ways of handling crop diseases like downy mildew on basils. It ensures that you get the benefits as far as the high yields and quality are concerned. With Novobac’s organic fungicides, soil-borne diseases are never going to be effective against your crops.

It is very easy to apply Cropium. Treating downy mildew on basil needs all the basic things to be covered. 

  • You need to use it in a way that this fungicide helps the good fungus to create a strong colony in the soil around the roots of the plants to fight downy mildew. 
  • It will ensure that the pathogenic bacteria lose their living space and reproduction scopes. It blocks the pathogenic disease like downy mildew growth. 
  • It ultimately promotes plant growth by increasing the availability of phosphate in the soil. 
  • It acts as a booster for the roots and shoots boost by supporting good stress tolerance capacity among the basil plants.

It is essential to know about the proper dosage and methods related to it. If you are opting for drip irrigation, then apply 1 gram per square meter. In the case of soaking seedlings, you can dilute the Cropium 50 times water and dip the root of the seeds. After the dipping process, you can do the planting. Soil drenching is a method that is preferable for the best effect, and in such cases, too, you can apply 1 gram per square meter.

Advantages of choosing Penicillium Bilaiae


Penicillium Bilaiae is quite effective when we are talking about sustainable farming and gardening. Cultural methods might help to reduce the issues, and chemical insecticides might quickly resolve the short-term problems, but in the long term, Penicillium Bilaiae is the organic fungicide that can help in the growth of plants without hampering the soil. It protects the seeds from facing pathogens while increasing the stress tolerating capacities.

Choosing Penicillium Bilaiae for treatment of downy mildew on basil

Penicillium nourishes the plants, although it does not have much mobility except for staying constant in the soil. It ensures uniform maturity among the basil plants. It shows that this organic fungicide promoted by Novobac prefers the all-around growth of the basil plants rather than putting a patch to resolve a short-term issue.

Novobac is a brand that specializes in resolving the diseases faced by crops in a way that benefits the environment, and Cropium, along with its active ingredient, Penicillium Bilaiae, is in complete alignment with it. This biological solution is the best alternative to the hazardous chemical insecticides. It addresses the challenge quickly without hampering the quality of the soil, which is essential in agricultural practices.


Basils are pretty crucial in the kitchen and on the plantation. They are the companion of many vegetables in both places. If downy mildew disease arrives, it is rather vital to cure these plants as soon as possible, but more important than that is to have the preventive measures ready. With the biological solutions from Novobac, you hardly need to break any sweat while addressing this horrible issue.

Novobac, with the fantastic Cropium, is the manufacturer you need to go to resolve downy mildew on basil disease. With the increase in the demand for food, it is essential to have basil plantations solid and successful. Novobac can be the partner of every farmer in the sustainable agricultural practices journey.


  1. O’Callaghan, Maureen. “Microbial inoculation of seed for improved crop performance: issues and opportunities.” Applied microbiology and biotechnology 100.13 (2016): 5729-5746.
  2. Aamir, Mohd, et al. “Microbial bioformulation-based plant biostimulants: A plausible approach toward next generation of sustainable agriculture.” Microbial endophytes. Woodhead Publishing, 2020. 195-225.


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