Using hydrogen peroxide on your marijuana plants will not bring them harm. This common product found in drug stores and supermarkets, at 3% concentration, is a natural treatment for algae, gray mold, Pythium and powdery mildew. It is best applied as a soil drench and is available under several brand names. Gliocladium protects Mary Jane from gray mold by suppressing spore production. It produces volatile organic compounds which are toxic to other fungi and bacteria. Gliocladium is a species of parasitic fungus living in the soil. Also avoid applying in temperatures over eighty five degrees to avoid the leaves yellowing and dropping off the plants. Use a diluted solution on young plants to prevent burning of the tender leaves. However, it should only be applied before the flowering stage. Bordeaux Mixture is a good option for controlling these diseases on outdoor grown marijuana plants, as it withstands rains, enabling its effect to remain on the foliage.
As such, it is a good combatant for plant diseases caused by fungi and bacteria such as powdery mildew, downy mildew, leaf spots and fire blight. It is an added benefit that Bordeaux Mixture is also effective in controlling bacteria. The purpose of adding lime to copper sulfate is to reduce the damaging effect copper sulfate can have on marijuana plants. The most popular use today is in the form of Bordeaux Mixture, which combines copper sulfate with lime. The use of copper as a fungicide has been practiced for centuries.
While barley straw has not been approved by the EPA for use in public waters, it is available for purchase by homeowners for hydroponics and private ponds. Barley straw does not kill existing algae but does prevent the growth of new algae cells. Two strains are available one for foliage applications (QST 713) and one to be used as a soil amendment at the time of planting (GB03 or MBI600). Download my free marijuana grow bible at this link and learn to grow like a pro! Barley Straw Rafts and Pelletsīarley straw rafts are used in hydroponic cannabis systems to inhibit the growth of algae. This biological fungicide can be procured online under several brand names.
Bacillus Subtilis compounds prevents pathogens from colonizing crops.
For this reason, it has been approved as a fungicide and bactericide for use in organic farming. It has proven to fight blight, gray mold and several strains of mildew, yet has no adverse affects on the environment or humans. Application boosts the cannabis plants’ immune system, inhibiting fungal germination and growth.īacillus Subtilis is a naturally occurring anti-fungal bacterium found in soils. A commercial product is available by the name of Sonata. The growth of Bacillus Pumilus on plant roots prevents Fusarium spores from germinating. It is resistant to environmental stresses, include UV light. Bacillus Pumilus is a spore-bearing bacterium found in soil.
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