Various diseases are the main threat to cannabis plants. With proper care, the risks of disease can be minimized, but even so, you cannot be one hundred percent sure that the plants are healthy. One obvious sign of a disease is yellowing cannabis leaves. Of course, this is not always a clear sign that the disease is consuming the plant. Insufficient watering or too high a temperature may be to blame. But it’s important to properly identify why cannabis leaves are turning yellow and try to restore the plant’s health. Let’s talk about what cannabis diseases are and how you can get rid of them in this article.
Classification of cannabis
Cannabis diseases can be classified into several basic types:
Infectious and non-infectious;
In almost all cases, the main reference point and indicator that the plants are not healthy is exactly the cannabis leaf. And by the defects of the leaves it is easiest to determine the nature of the disease.
About bacterial and infectious diseases
Such diseases cover immediately the leaf of the cannabis plant, and then affect the whole plant down to the root system. Such diseases occur when the plants are kept in conditions of low temperature (less than 15 degrees) and humidity of more than 70-80% (for example, if the cannabis is grown in a basement without proper lighting (about the signs of light deficiency here) and ventilation.
With infectious and bacterial diseases, spots appear on cannabis leaves, a characteristic gray plaque forms, and over time it turns into a fine-grained black mesh. First, the leaves die, starting to rot actively, and then the stem simply breaks.
Remember, the problem is easier to prevent than to fix. When watering cannabis, it is advisable to stay away from the leaves. Plus, if we’re talking about indora, you need to ventilate regularly. If the problem is already detected, Bordeaux liquid, which should be sprayed on the plant 2-3 times a day, will help fix the situation.
If you see cannabis leaves wilting and white rotting on them, this is also a sign of too much moisture. These symptoms are often seen in the outdoors after prolonged and heavy rains. Sometimes it even happens that the leaves fall off before they even have time to wither.
Tip: If yellowing is detected, pruning the affected cannabis leaves is recommended. If cannabis is diseased in the indoors, it is also recommended to ventilate the room. For treatment, it is necessary to spray the bushes with a copper-soap solution. 100 grams of laundry soap should be diluted in 9 liters of water, and separately dissolve 10 grams of copper sulfate in 1 liter of water. After all this is mixed.
The main sign of cannabis fungal disease is the formation of a white plaque on the leaves. In some cases, black fungus also appears. Here, as a rule, we are dealing with pests. For example, aphid whitefly. Because of it, hemp leaves dry out and dark spots appear. Also a sign of aphid activity and cannabis diseases in general can be an unreasonable slowing down of cannabis growth. In fact, the fungus closes the micro-holes through which the leaves feed on carbon dioxide.
To combat the fungus, you need to follow two steps:
First, very gently with a damp cloth (as gently as possible) to remove the resulting plaque. The main thing is not to overdo it. You should not put too much pressure on the leaves, since they are quite fragile. But at the same time, it is worth taking care that all the plaque is removed. If necessary, the procedure is repeated;
To treat fungi and eliminate pests, it is best to use a Bordeaux mixture. Another good way to get rid of the fungus or eliminate it is to put a bush of domestic geraniums nearby. The fungus does not like this plant and will retreat.
About Marijuana Non-Communicable Diseases
The main cause of non-communicable diseases is a change of scenery. For example, a jump in temperature, a change in diet, a lack or excess of minerals. Marijuana is quite a sensitive plant, so such changes are best avoided.
Very often non-infectious diseases are caused by improper watering. It is worth paying attention to the manufacturer’s recommendations for the particular cannabis variety in the first place. Too much watering causes mold, and a lack of moisture dries out the cannabis leaves.
Tip: A top tip for all varieties is to water only when the topsoil is completely dry. Ideally, if the soil is dry to a d
epth of 5 cm or more. During the heating season and in the summer, it is recommended to humidify the air, so that the humidity does no
t fall below 50%.
If you see that the cannabis leaves do not look as they should (yellowing, browning, blackening, plaque or wilting), this is the first and main red flag. Make sure that the conditions are exactly right for the variety. Always be very careful with the temperature and humidity, try not to water the plants too much and not to get too much liquid on the leaves. They can be sprinkled a little during hot weather and when the humidity is low, but no more than once a day (for most varieties). Otherwise fungus can appear.
Also choose commercial cannabis soils, which are specially prepared for growing plants and enriched with vitamins and minerals. This ensures a better growth and yield and also makes it a safer growing medium. By taking soil from the forest, for example, there is a great risk of bringing pests with it, which will ruin the whole crop.
Last but not least, make sure that you always have a beard mixture, since it is considered one of the best remedies for infectious and bacterial cannabis diseases. You don’t have to choose the most expensive one. Spend a few hundred rubles and rest assured that you will have a good treatment in case the plants are in danger. To use it, you need to mix the mixture (sold in horticultural stores) with water at room temperature in a ratio of 1/4, then pour it into a sprayer and spray the affected plants.