The quality of the strain is crucial for achieving high yields in *Pleurotus ostreatus* cultivation. High-quality secondary and tertiary strains should exhibit specific characteristics to ensure successful growth. The mycelium should be dense, white, and uniformly thick, with a fine, velvety texture and the ability to climb the walls of the container. A small number of coral-like mushroom primordia may appear on the surface of the medium, indicating early development. The ideal age of the strain is between 20 to 25 days, as this ensures optimal vigor and readiness for fruiting. The mycelium should be clearly visible, and the strain should emit a distinct, pleasant mushroom aroma. If there are numerous fruit body primordia on the culture surface, it means the strain is mature and should be used promptly.
Before introducing any strain, it's essential to determine its temperature type and match it with the local climate conditions. During August and September, *Pleurotus ostreatus* is typically cultivated, but temperatures can rise above 30°C during the fruiting stage. As October approaches, temperatures gradually decrease. To ensure consistent mushroom production under varying temperature conditions, the selected strain must be able to tolerate both high and low temperatures. For example, from mid-August to mid-September, varieties like Jiangdu 109 and Huafeng No. 1 are ideal. From late September to mid-October, strains such as 9703 and P50 perform well. From late October to the end of November, Ping Wang 8801 is recommended. Choosing the wrong strain can lead to poor growth or even failure during the autumn season, so careful selection is critical.
In addition, it's important to consider local natural resources when choosing strains. The primary substrates used for *Pleurotus ostreatus* cultivation are cottonseed hulls and corn cobs. Different strains have varying abilities to break down these materials, so selecting a strain that is well-suited to the available substrate is essential for maximizing yield and quality. Always ensure that the strain you choose is compatible with your growing environment and resources.
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