Biological agent for preventing and treating black spot of dendrobium officinale and preparation method of biological agent

The invention provides a biological agent for preventing and treating black spot of dendrobium officinale and a preparation method of the biological agent, and relates to the technical field of dendrobium planting. The biological agent for preventing and treating dendrobium officinale black spot is prepared by mixing a ginger extract, an aloe fermentation extract, gossypol, salicylic acid, tea polyphenol, sodium silicate, carboxymethyl cellulose sodium and diatomite. The defects in the prior art are overcome, the biological agent is prepared from multiple natural components, prevention and treatment of black spot during dendrobium planting are improved, the yield and quality of dendrobium are further guaranteed, and the economic benefits of dendrobium planting are improved. 本发明提供一种防治铁皮石斛黑斑病的生物药剂及其制备方法，涉及石斛种植技术领域。所述所述防治铁皮石斛黑斑病的生物药剂由生姜提取物、芦荟发酵提取物、棉酚、水杨酸、茶多酚、硅酸钠、羟甲基纤维素钠、硅藻土混合制备得到。本发明克服了现有技术的不足，通过多种天然成分制备生物药剂，提升对石斛种植时黑斑病的防治，并且进一步保证石斛的产量和品质，提升石斛种植的经济效益。