Stem rot in cannabis plants is a serious condition typically caused by fungal pathogens, which can lead to significant damage or loss of the plant if not addressed promptly. Here are key points about stem rot in cannabis plants:
Causes
1. Fungal Infections: The most common fungi responsible for stem rot include *Botrytis cinerea* (gray mold), *Sclerotinia sclerotiorum* (white mold), and *Pythium* species.
2. Poor Growing Conditions: High humidity and poor air circulation can create favorable conditions for fungal growth.
Symptoms
1. Discoloration: Dark or brown spots on the stem near the grow medium (sponge), which may eventually turn black.
2. Softening and Wilting: The affected part of the stem becomes soft, and the plant may wilt.
3. Mold Growth: Visible mold growth on the stem (usually near the grow medium), which can be gray, white, or fuzzy.
4. Stunted Growth: Plants may exhibit slowed growth and overall poor health.
Prevention
1. Proper Air Circulation: Ensure good airflow around the plants to reduce humidity levels.
2. Sanitization: Sterilize tools to prevent the spread of pathogens.
Treatment
1. Fungicides in removing infected parts: Apply fungicides to a paper towel and gentle wipe the steam, along with the top of the root starter. This should be done at least once a day, until you start to see improvement. We are a fan of organic options like neem oil, such as this one.
2. Improve Conditions: Reduce humidity and increase air circulation immediately to inhibit fungal growth.
3. Monitor and Isolate: Keep a close watch on the stem of your plant to see if the infection begins to spread. If you see fungal growth on the sponge, wipe it off with a paper towel.
Addressing stem rot promptly and maintaining optimal growing conditions are crucial for the health and productivity of cannabis plants.
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