Propagation Phase
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Fungus gnats
Fungus gnat larvae are common root-feeding pests during the propagation phase of cannabis cultivation. These tiny larvae feed on young roots and organic matter in growing media, damaging delicate root systems and stunting early plant development. Infestations can lead to slower growth, weaker plants, and increased susceptibility to root diseases.
Biological control of fungus gnats in cannabis
Koppert offers an effective biological control strategy for fungus gnats during the cannabis propagation phase.
- Entonem contains beneficial nematodes (Steinernema feltiae) that actively target and kill fungus gnat larvae in the growing media, helping protect young roots and improve plant establishment.
- Entomite-M contains the predatory mite Stratiolaelaps scimitus, which feeds on fungus gnat eggs and larvae in the substrate, providing long-term preventative control in propagation trays and pots.
- Horiver Disc sticky traps help monitor and reduce adult fungus gnat populations by trapping flying insects around the base of cannabis plants and propagation blocks.
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Root pathogens
Root pathogens such as Pythium, Rhizoctonia, Fusarium, and Phytophthora are major threats during the cannabis propagation phase. These soilborne diseases attack young roots and stems, causing damping-off, root rot, poor rooting, and weakened plant development. Infected cuttings and seedlings may show symptoms such as yellowing, wilting, stunted growth, or sudden collapse. Warm, wet growing conditions and overwatered substrates can increase disease pressure. Early prevention through proper hygiene, environmental management, and biological solutions is essential to maintain healthy root development and successful cannabis propagation.
Biological control of root pathogens in cannabis
Trianum-P is Koppert’s biological solution for preventing and controlling root pathogens during the cannabis propagation phase. Based on the beneficial fungus Trichoderma harzianum T-22, Trianum-P colonizes young roots and protects them against damaging soilborne diseases such as Pythium, Rhizoctonia, Fusarium, and Phytophthora. It works by competing with pathogens for space and nutrients, parasitizing harmful fungi, and strengthening the plant’s natural defenses.
In cannabis propagation, Trianum-P supports stronger root development, improved nutrient uptake, and more uniform plant growth — helping young plants establish quickly under high-pressure conditions. The product can be applied preventatively through drench or irrigation systems immediately after sowing or sticking cuttings for optimal root zone protection.