Superior strains are the premise to achieve high yield in mushroom cultivation, the usable strains should own the following characteristics:
1. The bottleneck is wrapped tightly, with no looseness on cotton tampon, fungus bottle and fungus sack are free from cracks .
2. Own suitable fungus age, generally no more than 4 months.
3. The spawns are white, robust, uniform and healthy, cling to bottle walls, free from the phenomenon of shrinkage, free from any sundry colors such as ashen, black and croci .
4. The strain holds proper integrity, stretchy, possesses no any loose or gum phenomenon .
5. Fungus blocks send out the fragrance of spawn and are free from stink or sour bread flavor.