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Prevent mushroom fungus gnats early: early prevention and early treatment give good results

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Fungus gnats, also known as "gall midges", reproduce very quickly and often carry bacteria that cause disease in mushrooms; their larvae (maggots) are divided into white and orange types. Fungus gnats often lay eggs on the compost used for growing mushrooms; the eggs begin to hatch before the mycelium has fully colonized the growing substrate, and before the first flush of mushrooms appears the larvae have already grown large and burrow into the mushroom stems and caps to cause damage. Therefore, fungus gnat control should be carried out early. First, for the growing substrate used for mushrooms, use twice-fermented substrate as much as possible; for each ton of substrate, use a 1000-2000 times dilution of 49% diazinon emulsion to spray the mushroom house and bed frames, and seal doors, windows and vents

Fungus gnats, also known as "gall midges", reproduce very quickly and often carry bacteria that cause disease in mushrooms; their larvae (maggots) are divided into white and orange types. Fungus gnats often lay eggs on the compost used for growing mushrooms; the eggs begin to hatch before the mycelium has fully colonized the growing substrate, and before the first flush of mushrooms appears the larvae have already grown large and burrow into the mushroom stems and caps to cause damage. Therefore, fungus gnat control should be carried out early.

First, for the growing substrate used for mushrooms, use twice-fermented substrate as much as possible; for each ton of substrate, use a 1000-2000 times dilution of 49% diazinon emulsion to spray the mushroom house and bed frames, and doors, windows and ventilation tubes should be firmly sealed with plastic mesh, and the mesh is best coated with a long-acting mosquito-repellent. Second, if there is damage from fungus gnat larvae, when there are no mushrooms on the bed, spray a 2500-3000 times dilution of 2.5% deltamethrin, or a 2000-3000 times dilution of 20% fenvalerate, or a 1500-2000 times dilution of 50% malathion for control. During the peak emergence period of adults, a 800-1000 times dilution of 80% dichlorvos can also be sprayed into the air space of the mushroom house.

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