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Avoid mushroom wet cap or high relative humidity (95–100 percent) germination occurs in hours at temperatures of 60–65☏.

Weft-cotton-like mycelium (usually white sometimes gray, pink, or yellow) covering casing, mushrooms, and/or pins (Figure 3).

Green Mold Photo credit: David M.Beyer Cobweb ( Cladobotryum or Dactylium)

Avoid vectors: people, equipment, plastic.įigure 2.

Starts out gray and later turns white along the edges and green as it sporulates (Figure 2).

Dark green mold patches on casing that spread to lesions on stem.

Beyer Green Mold ( Trichoderma aggressivum)

Steam early when infestations are heavy to reduce spore load on the farm.įigure 1.

Cover infected mushrooms with salt or spray alcohol.

Learn to identify bubble and all symptoms.Avoid vectors: water, equipment (waterers and watering equipment and picking baskets, ladders, and tools), people (dirty hands and clothes), flies, dust and water particles, brooms, and high-pressure sprays.Dry Bubble ( Lecanicillium fungicola previously named Verticillium)

Below are the most important fungal diseases of mushrooms. Appearance will depend on the timing of infection and the number of spores. Infection takes on a variety of forms and has various symptoms, from small spotting on the surface of a mushroom cap to complete infection of the fruiting body so that it is unrecognizable as a mushroom. There are also control measures specific to each disease. Many control methods, such as sanitation, are useful for all of the diseases. But all of the pathogens reduce the total crop return, often significantly. Fungal pathogens can affect the quality of the product, reduce production, or both. Some of these are true pathogens attacking the mushroom mycelium, while others can simply outcompete mushroom mycelium growth. There are many fungal pathogens of mushrooms, but only a few of them currently affect commercial mushroom farms. By Maria Gorgo - Gourovitch and David Meigs Beyer