How can I Identify and Treat Cannabis Plant Diseases?

How can I Identify and Treat Cannabis Plant Diseases?


Common Diseases In The Cannabis Plant & How To Combat …

Leaves appear dry and the stem becomes soft and brown. Early grey mold can also present itself as a powdery white substance, that will darken over time to a grey (sometimes even black or purple) fuzz, and eventually a grey-brown slime. Once visible to the naked eye, the internal damage to the plant is often too far gone for treatment.

Upward curling of leaf tips may also be seen. Fusarium also commonly causes root rot, where roots and eventually the stem turn red inside and burst in areas, inviting in further disease-causing agents. With no effective treatment and its ability to easily spread through soil, water, and air, Fusarium is one to avoid at all costs.

In seedlings, a visible browning at the soil line occurs, which eventually leads to a stem that flops over and leaves that yellow and wilt. Damping-off affects seeds and seedlings, destroying your plants before they even have a chance to grow. If your seedlings are showing signs of damping off, your best bet is to remove them to prevent surrounding contamination.

With the recent legalization of cannabis in Canada and the increase in crop cultivation that follows, we will also see an increase in the occurrence and severity of diseases. Take the Cannabis Aphid, for example, a pest that has just recently shown its face in North America and is preying specifically on cannabis plants.

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It is also likely that we will discover new diseases that we haven’t had to face before. Not only will these diseases threaten our crop growth, but also their functionality, as some plant diseases can threaten the health of cannabis consumers. So how can we protect our cannabis? The old saying “know your enemy” certainly holds true for cannabis diseases.

This has led to a lack of documentation on the subject, as secret production results in little regulation and informal study. Today, one of our biggest hindrances in identifying cannabis diseases is the lack of long-term, cannabis-specific pest studies. We need to know exactly what we are up against in order for pest treatments to be specific and thus effective, as prevention is not always an option.

“Science was in short supply, but it’s going to be very important for the next chapter of the cannabis industry.” – Plant pathologist, Michael Ravendale For organic cannabis growers, we are optimistic that this research will lead us in the same direction as organic farming- where products are safe, regulations are clear, and growing is sustainable.

Prevention in all cases included temperature and humidity control, good air circulation, and good sanitary procedures. These are all external methods of protection. What we have yet to touch on is fighting off cannabis disease internally. Much like a healthy person with a strong immune system, healthy plants living in healthy soil have a head start in disease prevention.

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Knowing the signs of nutrient deficiency is essential for growing weed. Check out our resource on what nutrients cannabis plants need, and here we’ll talk about how to identify and correct nutrient deficiencies. Identifying cannabis nutrient deficiencies When cannabis plants don’t get the correct amounts of nutrients, they become stressed and more susceptible to bugs, mold, and other pathogens.

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8-6. 8Hydroponics: 5. 5-6. 5; most hydroponic nutrient brands will indicate an ideal level for their product If the p, H is correct, your plants may have a nutrient deficiency. Mobile and immobile nutrients for cannabis plants Nutrients are classified as mobile or immobile depending on whether they can be translocated once they have been fully assimilated by the plant.

Magnesium deficiency symptoms include: Plants will not show signs of a magnesium deficiency until 3 to 6 weeks after it has begun, at which point you’ll see areas between the veins of older leaves turn yellow (interveinal chlorosis) and the formation of rust coloured spots, These symptoms will progress through the whole plant, with more and larger spots developing in the interveinal areas as well as tips and margins of leaves, Some leaves will curl, die, and drop, while the whole plant looks sickly and droopy, Symptoms of magnesium deficiency will quickly escalate during flowering, leading to a reduced harvest Sulfur deficiency Essential to plant respiration and the synthesis and breakdown of fatty acids, sulphur (semi-mobile) plays a huge part in the production of oils and terpenes.

Water with just water for a few more cycles before introducing nutrients again. How to prevent nutrient lockout There are a few ways to prevent a nutrient lockout in cannabis plants: Check this every time you water. If p, H is off, you can use p, H Up or p, H Down.

How to Identify and Treat Marijuana Plant Diseases?

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Trevor Hennings contributed to this article.

Nutrient lockout typically occurs when you use concentrated chemical fertilizers over extended periods of time. Trace amounts of nutrients and salts from your fertilizer can build up in your medium, changing its p, H and interfering with your plant’s ability to absorb nutrients in the future. Typically, the nutrient lockout is treated by flushing the substrate with p, H balanced water and starting your feeding regime over again.

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Unlike other plants, cannabis is only able to absorb nutrients within a small p, H window; if your soil, water, or fertilizer is outside that window, your plant won’t be able to feed properly. Not only will you be wasting expensive nutrients, but you might also have to deal with nutrient deficiencies and/or lockout further down the road.

Some of the most common root-related problems affecting cannabis growers include: ROOT-BOUND PLANTS Plants become root-bound when they completely outgrow their containers. The roots will have grown around the circumference of their pot, forming a tight knot. Not only does this stress the plant, but it also affects its ability to take up water and nutrients, which can lead to deficiencies, p, H imbalances, and nutrient lockout.

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