Compound bio-preservative for taro storage and preparation method thereof

Abstract

The invention discloses a compound bio-preservative for taro storage. The compound bio-preservative is prepared from biomass coating spreader and Chinese herbal medicine preservative. The biomass coating spreader is prepared from, by weight, 7-8 parts of sodium alginate and 2-3 parts of chitosan. The Chinese herbal medicine preservative is prepared from, by weight, 30-70 parts of root of membranous milkvetch , 15-30 parts of root and rhizome of medicinal rhubarb, 5-15 parts of Chinese gall, 5-15 parts of Chinese wedelia herb or root and 5-10 parts of fruit of star anise. The novel compound bio-preservative has high and broad-spectrum antibacterial and disease-control effect, and especially has joint prevention and control effect on bacterial soft rot and various mould diseases in taro storage. The preparation method of the compound bio-preservative is simple; the compound bio-preservative is low in cost, easy to store and convenient to apply. The compound bio-preservative has the advantages of reducing rot and mildewing of taro during storing, transporting and selling, maintaining quality of taro, and being safe and efficient, and free of pesticide residue and the like.

Description

technical field [0001] The invention relates to the technical field of storage and preservation of agricultural products, in particular to a compounded biological preservative and fresh-keeping agent for taro storage and a preparation method thereof. Background technique [0002] The infection of pathogenic microorganisms is the main cause of post-harvest taro spoilage, and the losses caused by it generally account for 20% and 25% of the yield, and in severe cases it can be as high as 50% or more, such as various weak parasitic or epiphytic molds, such as roots. Mildew, Penicillium, Pythium, Phytophthora, etc., are the main pathogenic fungi that cause the spoilage of vegetables after harvest. Bacterial soft rot caused by Erwinia is another main reason for the spoilage of taro during storage. During the storage process of taro, bacterial soft rot and fungal diseases usually occur together, which promotes each other, resulting in rapid rotting and deterioration of taro, endang...

AI Technical Summary

Problems solved by technology

However, the application of chemical pesticides and antibiotics on stored taro faces the following three problems: First, the application standards for postharvest fungicides on taro are relatively high, and the types and dosages of fungicides that can be applied are strictly limited. Post-harvest taro is widely used, and the residues of pesticides and organic compounds are seriously exceeding the standard; in addition, the resistance of post-harvest pathogenic bacteria is increasing, and the cost of developing new high-efficiency fungicides that meet current market standards is high, and there are not many alternative fungicides to choose from ;Finally, with the growing awareness of the environment and food safety, people think that chemical fungicides and antibiotics are harmful to human health and threaten the safety of the environment. International trade barriers to protect the country's taro industry

[0004] Generally, the antibacterial spectrum of an antagonistic bacteria is relatively single, and the control effect on postharvest taro pests and diseases is average, and there is a certain gap compared with chemical fungicides. The biological control technology based on plant extracts is considered to be the future control of postharvest taro pests and diseases. However, how to achieve biological control based on Chinese herbal medicine plants without harming human health and threatening environmental safety is a common problem faced by current biological control technologies

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