Key Technical Points and Detailed Cultivation Methods for Pioppino Mushroom

The pioppino mushroom (Agrocybe aegerita) is delicious in flavor with a crisp, tender texture, and is rich in protein and amino acids, making it one of the most popular edible mushrooms in Europe and Southeast Asia.

Requirements for the cultivation environment

1. Nutrition The pioppino mushroom is a wood-rotting fungus, and the nutrients required for its growth and development are mainly carbon sources and nitrogen sources. Suitable carbon sources include sawdust and cottonseed hulls, while suitable nitrogen sources mainly include corn flour, soybean cake powder, wheat bran and rice bran. When mycelium is grown on PDA medium, or wheat grain spawn, or liquid spawn is inoculated onto media such as sawdust, sawdust plus cottonseed hulls, or pure cottonseed hulls, the mycelium grows vigorously and can all produce fruiting bodies (mushrooms) normally.

2. Temperature The mycelium growth temperature range of the pioppino mushroom is 5°C-30°C, with an optimum temperature of 25°C. Fruiting bodies can form at 10°C-28°C, with an optimum temperature of 20°C-22°C.

3. Water and humidity During the mycelium growth stage, the water content of the substrate is 65%-70%. The fruiting body growth period requires sufficient water, and the air humidity in the mushroom house should be maintained at around 90%. If humidity is too high, the fruiting bodies are very prone to opening their caps; if humidity is too low, the fruiting bodies shrivel and cannot grow large.

4. Air and light Mycelium growth does not require abundant light, but the differentiation and development of fruiting bodies require scattered light and sufficient oxygen, which is beneficial for sturdy fruiting body growth.

5. Hydrogen ion concentration (pH value) The mycelium can grow within a pH range of 4-11, with an optimum pH of 5-6, belonging to the slightly acidic range.

The pioppino mushroom has relatively strong mycelial protease activity and a relatively strong ability to utilize protein, so when preparing the substrate, an appropriate amount of corn flour or soybean cake powder should be added, which helps increase yield.

Production of spawn for cultivation

Use polypropylene plastic bags filled with cooked substrate for cultivation, with bag specifications of 17-33 cm.

Substrate formulas

1. Sawdust 40%, cottonseed hulls 40%, corn flour or soybean cake powder 5%, wheat bran or rice bran 14%, gypsum 1%.

2. Cottonseed hulls 78%, corn flour or soybean cake powder 5%, wheat bran or rice bran 14%, gypsum 1%.

The sawdust or cottonseed hulls should first be sprinkled with clean water or soaked to pre-wet them. After the remaining raw materials are mixed together, they are then thoroughly mixed with the pre-wetted sawdust or cottonseed hulls, and the water content adjusted to 65%-70%.

After the raw materials are evenly mixed, immediately fill the bags to 1/3 of the bag height. The bag opening can be fitted with a neck ring and cotton plug, or the bag opening can be folded flat (for inoculation and then fitted with a rubber band). Bag filling must be completed within 5 hours before placing into the pot for sterilization, to reduce microbial growth before sterilization. Bag filling should not be done in sunlight, to avoid fermentation and spoilage of the raw materials. When filling bags, fill lightly, press lightly (compress and level the substrate surface appropriately), handle lightly, and place lightly. For atmospheric pressure sterilization, maintain at 100°C for 10-14 hours; for high-pressure sterilization, maintain at 1.5 kg/sq cm pressure for 3 hours to ensure thorough sterilization. After sterilization, wait for cooling before inoculation.

Inoculation

Inoculation must strictly follow aseptic procedures at each step. Appropriately increase the inoculation amount to help the mycelium colonize and spread as quickly as possible. The stock spawn used should have white, robust mycelium with no contaminant spots. The spawn bottles should first be soaked in 0.5% benzalkonium bromide solution and wiped dry, then placed into an inoculation box or inoculation room. The inoculation box or inoculation room must be disinfected for 30 minutes as required. During inoculation, scrape off the top 2 cm of substrate from the stock spawn bottle before inoculating. If using liquid spawn, the inoculation amount is 10 ml per bag. After inoculation, move the spawn bags to a previously prepared clean, dry, ventilated, low-light incubation room for culturing. During the mycelium growth period, the room does not need frequent ventilation. After the mycelium has fully colonized, loosen the bag openings to facilitate the formation of mushroom buds. After mushroom buds appear, move the bags to the mushroom house. As the mushroom buds gradually grow, cut off the bag openings and adjust the relative humidity of the mushroom house to 85%-90%, with temperature controlled at around 22°C. As mushroom buds grow out around the substrate block, gradually remove the bags downward. Mist with water twice a day, in the morning and evening, but do not spray water directly onto the fruiting bodies, and maintain ventilation and scattered light in the mushroom house.

Harvesting

Harvest when the partial veil is about to break. Harvesting must be timely; once the partial veil beneath the mushroom cap breaks, the harvested mushrooms will lose their commercial value.

Pest prevention

The cultivation season for the pioppino mushroom has relatively high temperatures, so special attention must be paid to controlling sciarid flies (eye gnats). Cultivation bags damaged by them will lose their white mycelium, and the substrate will turn dark brown, preventing mushroom buds from forming, and any buds that have already formed will also shrivel and rot. Because no pesticides can be sprayed during the fruiting body (mushroom) growth period, before moving the cultivation bags into the mushroom house, the mushroom house must be fumigated and disinfected. Doors and windows should be fitted with 60-mesh screen doors and windows to prevent the very small sciarid flies from entering the mushroom house and causing damage.