Best fungicide for powdery mildew

Cannabis crops are exposed to various threats and infestations. One of the most common ones is powdery mildew, also known as oidium. It’s a fungus that attacks cannabis crops, affecting the whole plant from stem to flowers. To prevent and destroy oidium, you can choose from a huge range of insecticides and fungicides for powdery mildew available on the market. What is the best fungicide for powdery mildew? In this article, we will explain what powdery mildew is and present our selection of the best powdery mildew fungicides.

What is powdery mildew?

Powdery mildew is a type of fungal disease that appears in both indoor and outdoor crops, usually during summer or autumn. Indeed, there are various varieties, some of which develop better in certain crops.

It is a fungus that proliferates quickly, as the spores are dispersed by the wind or flying insects. It settles on plants’ leaves, affecting the yield since it reduces the capacity to carry out photosynthesis. Similarly, it can appear due to drastic changes related to humidity, which are very frequent during the rainy months.

How to detect it?

To prevent it from spreading rapidly throughout the crop, here are some aspects that allow us to recognise powdery mildew: 

• An alteration of the leaf mass reduces the capacity of the plant. As a consequence, a white powder shows up on leaf surfaces.
• Weaker plants as it decreases certain nutrients they need, causing stress while reducing their growth and slowing down flowering. 
• It affects the quantity produced as well as the aroma and taste.
• Once the fungus reaches the buds, they cannot be consumed because of the risks.

Preventing powdery mildew

The following tips should also be followed to prevent:

• Ensure that there is sufficient ventilation, avoid condensation inside the growing room, and ensure that the extraction method is adequate.
• Keep the humidity between 40 and 60% indoors and keep the culture clean.
• Avoid placing plants in damp, cold environments and leave considerable space between plants. 
• Use a preventive fungicide every 15 days. 
• Do not overdose on nitrogen.
• Grow oidium-resistant strains
• Clean pots thoroughly before use.
• Once infected, treat healthy plants first and then the affected ones.

Best fungicides for powdery mildew

Nowadays, the variety of fungicides and fertilisers to control powdery mildew is enormous, for your convenience here are some of the most effective treatments:

Multiprotection Boom

Multiprotection Boom is one of the best fungicides for powdery mildew by Boom Nutrients. Its formula aims to protect crops from various invasions such as whitefly, aphid, and red spider mite. Moreover, it increases plants’ natural defences.

To generate the best results with Multiprotection Boom, you should start applying it preventively in the first days of the plant’s life, maintaining a constant application every 10 days. However, if you want to control a pest, it is better to make three applications, 2 days apart.

Dosage and instructions for use :

• Dilute 2 ml per litre for preventive use. Increase the dose to 3 ml/litre when used as a treatment.
• Indoors, spray when the lights are off and outdoors at dusk or in the early morning.
• Use quality water with a pH of 6-7.

Composition of Multiprotection Boom :

• 0.7% nitrogen
• 6% free amino acids

Oidio Killer 

Oidium Killer by Agrobacterias, increases the resistance of plants against possible fungal attacks, preventing fungi such as powdery mildew from establishing themselves in the crop.  It is effective against all types of fungi but is particularly effective against powdery mildew, botrytis, and fusarium.

This product can be applied foliar to plants every 15 days, providing instant protection. It should be diluted between 1.5 and 2 grams per litre of water.

Composition of Oídio Killer :

• Bacillus Amyloquefaciens (109ufc/g)
• Natural amino acids
• Organic potassium

Domark Evo Mildew Fungicide

Domark Evo Mildew Fungicide is ideal for controlling this dangerous pest in just a few applications. It can be used as a preventive spray every 15 days. If powdery mildew has already established itself in the crop, it is advisable to stop its progress. To do this, it should be applied every 10 – 15 days.

Domark Evo

Domark Evo fungicide Dosage and composition:

• Use 2 – 3 ml per litre of water.
• Composition: Tetraconazole: 12.5%.

To conclude, it is important to know which are the best fungicides currently available on the market and how to use them to avoid problems.