(1) the purchase of seeds should be complete to the two certificates (strain production license and strain sales license) of the strain production unit to order the required strains, do not covet the cheap price of strains to the non-production conditions of the strain field to buy strains.
(2) buy strains from clear sources and caste characteristics clear strains, do not covet the cheap price of strains to buy strains from unclear sources and caste characteristics are not clear strains, in particular, to find out whether it is the same name or the same species of strains with different names.
(3) the purchase of pure strains, the so-called "positive" is that the species is "authentic", not a fake substitution of varieties, should try to the required varieties of authentic breeding, authentic introduction of the unit or individual strains of the field of ordering strains.
(4) Purchase the appropriate age of the strains, according to the arrangement of the production season, order in advance, so that the required mushroom varieties of the appropriate age, to prevent the age of the mushroom growth time is too long aging, contamination, or the age of the mushroom is too short, not full of vials or bags of fungi.