A Detailed Guide to the Latest Symptom Identification and Control Methods for Mushroom Mites

In the process of edible mushroom cultivation, mushroom mites are the most common and also the most damaging insect pest. They have strong reproductive capacity, and once they invade, they are extremely difficult to control, especially in high-temperature seasons. To achieve high yields, controlling mushroom mites is extremely important. So what are the signs of mushroom mite damage? How should they be controlled? Let's find out together.

1. Occurrence Pattern

Mushroom mites prefer warm, humid environments and often lurk in rice straw, rice bran, wheat bran, and cottonseed hulls to lay eggs, entering the mushroom house along with these materials. When conditions are unfavorable, they become dormant bodies, and during dormancy they can attach to insects such as mosquitoes and flies to spread. The peak breeding period occurs at 15-38 degrees, and each female mite lays 50-200 eggs. They can overwinter as mites and eggs in the gaps between the shelves of the mushroom house, and continue to cause damage when the temperature is suitable and nutrients are sufficient.

2. Symptoms

In mushroom spawn affected by mites, the mycelium at the bottle mouth is not dense enough and shrinks and degenerates, and sometimes no mycelium can be seen in the culture medium at all. When the mushroom body is damaged, the white mushroom blocks turn black and give off an unpleasant musty odor. When young mushrooms and mature fruiting bodies are damaged, brown or yellow lesions appear on the caps and stipes. In the early stage, the spots are sunken or have holes, with dark brown edges and slightly lighter or hollow centers, but the fruiting bodies do not rot.

3. Preventive Measures

Once mite damage occurs in a mushroom house, it is extremely difficult to control in a short time, so prevention is the main approach in production. Choose mite-free spawn, carefully inspect the spawn before inoculation to ensure it is mite-free, and promptly discard any spawn bottles found to contain mites. In addition, the compost for button mushrooms should undergo secondary fermentation, and the compost for other mushroom types should undergo thorough sterilization treatment to kill the mites and eggs within. The mushroom house should undergo thorough pest elimination treatment before production. To reduce pesticide resistance, insecticides should be used in rotation.

4. Chemical Control

When mite damage is found, you can choose propargite 2000-fold solution or 0.5-1 degree Baumé lime sulfur mixture for spraying to kill them. You can also lay fresh tobacco leaves flat on the surface of the culture medium infested by mushroom mites, and when the mites gather on them, remove the tobacco leaves. If no mites are found afterward, repeat this method to continue trapping and killing until no mites remain.

The above is an introduction to the damage symptoms and control methods of mushroom mites. We hope it helps you. For more related knowledge, please stay tuned to us.