Combatting Downy Mildew on Basil with Effective Biological Solutions

Downy mildew on basil is the most common disease. Basil is a bit peppery and a bit sweet, and that is why you will find many people loving it. It is known to be one of the best companion plants for plants like tomatoes. It influences the taste of tomatoes in a significant way when both plants are planted, usually next to each other. 

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.


Treating downy mildew on basil: Cultural practices

  1. Crop Rotation: Changing the type of crops grown in a specific area from season to season to reduce the risk of soil-borne diseases and pests. It also helps improve soil fertility.
  2. Companion Planting: Planting certain species of plants together to benefit one another. For example, planting marigolds with vegetables to repel nematodes or using basil as a companion plant to improve the flavor and health of tomatoes.
  3. Weed Control: Regularly removing weeds that compete with crops for nutrients and space. This can be done through manual weeding, mulching, or using herbicides.
  4. Fertilization: Providing plants with essential nutrients through the application of organic or synthetic fertilizers to promote healthy growth.
  5. Irrigation: Properly watering plants to ensure they receive the right amount of moisture. Over- or under-watering can lead to problems like root rot or drought stress.
  6. Pruning and Training: Trimming and shaping plants to encourage optimal growth, improve air circulation, and reduce the risk of diseases.
  7. Thinning and Transplanting: Thinning crowded seedlings to allow for proper spacing and transplanting seedlings into the garden or larger containers when they outgrow their initial planting location.
  8. Soil Health: Improving soil quality through practices like adding organic matter, maintaining proper pH levels (6.0 to 7.5), and conducting soil tests to ensure the right conditions for plant growth.
  9. Harvesting and Post-Harvest Handling: Harvesting crops at the right time and handling them properly to prevent damage and ensure freshness and quality.
  10. Mulching: Applying mulch around plants to conserve soil moisture, control weeds, and maintain more even soil temperatures.
  11. Environmental Management: Taking into account factors such as sunlight, temperature, and wind exposure to optimize plant growth.

These cultural practices can vary depending on the type of plants being grown, the specific conditions of the garden or farm, and the goals of the grower. They are essential for promoting healthy, productive plants and preventing issues such as diseases and pests.


Treating downy mildew on basil: 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. 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. Among all these materials, Quadris is only meant for field use and cannot be effective in the greenhouse. K-phite, Fungi-phite, and Phrophyt are phosphite fungicides that are also effective against other mildew-related diseases too.

Effective Basil Downy Mildew Treatment: Biological Solutions

Basil downy mildew can be a persistent problem for growers, but there are effective biological solutions that offer sustainable and eco-friendly ways to combat this disease. One such solution is Cropium, a product developed by Novobac that harnesses the power of Penicillium Bilaiae as its active ingredient. This naturally occurring soil fungus not only fights against soil-related diseases but also promotes plant health and the uptake of essential nutrients.

Penicillium Bilaiae: A Beneficial Soil Bacteria

Penicillium Bilaiae is a  phosphate solubilizing bacteria known for its ability to solubilize phosphate. It’s widely used in agriculture and is highly eco-friendly. Not only does it effectively combat basil downy mildew, but it also plays a crucial role in enhancing plant growth and the uptake of phosphorus, a vital nutrient for plant development. Phosphorus, while essential, is relatively immobile in the soil, and plants can only access it from the soil. This is where Penicillium Bilaiae becomes invaluable, as it enhances phosphorus availability to the plants. 


Using Cropium: Application and Benefits

Using Cropium to combat basil downy mildew is straightforward. This organic fungicide  is applied to foster the growth of beneficial fungi in the soil around the plant roots, creating a hostile environment for pathogenic bacteria. This effectively blocks the growth of downy mildew and, in turn, promotes robust plant growth. Cropium serves as a booster for both root and shoot development while enhancing the basil plants’ stress tolerance capacity.

Dosage and Application:

  • For drip irrigation, apply 1 gram of Cropium per square meter.
  • For seedling soaking, dilute Cropium 50 times in water, then dip the roots of the seeds before planting.
  • Soil drenching is a preferable method for maximum effect, and in this case, also apply 1 gram per square meter.

Advantages of Penicillium Bilaiae for Sustainable Agriculture

When considering downy mildew management, it’s important to weigh the advantages of Penicillium Bilaiae against other common solutions, such as cultural practices and chemical insecticides.

Cultural Practices:

  • Cultural practices can help reduce downy mildew issues, but they often require extensive planning and may not provide a quick, targeted solution.
  • Penicillium Bilaiae, on the other hand, offers a more direct and immediate approach to combating the disease.
  • Cultural practices focus on disease prevention, whereas Penicillium Bilaiae can effectively address existing infections and promote plant health simultaneously.

Chemical Insecticides:

  • Chemical insecticides can offer short-term relief from downy mildew, but they come with potential environmental and health concerns.
  • Penicillium Bilaiae is an organic and environmentally friendly alternative to chemical solutions, aligning with sustainable agriculture practices.
  • Unlike chemical insecticides, Penicillium Bilaiae doesn’t harm the soil and supports long-term soil health, making it a preferred choice for sustainable farming.

Effectiveness and Long-Term Benefits:

  • Penicillium Bilaiae not only fights downy mildew but also enhances stress tolerance, promotes uniform plant maturity, and improves soil quality.
  • Chemical insecticides may address immediate issues, but they don’t offer the long-term benefits that Penicillium Bilaiae provides.
  • Cultural practices focus on prevention and may not be as effective in managing existing downy mildew infections or soil-borne diseases.

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. 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.
  2. Tyagi, Parul, et al. “Sustainable agricultural approach to study interaction of plants and microbes.” Plant-Microbe Interaction-Recent Advances in Molecular and Biochemical Approaches. Academic Press, 2023. 331-361.

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