Method for controlling postharvest diseases of grapes and preservative

Abstract

The invention discloses a method for controlling postharvest storage diseases before picking. The method comprises the following steps: after grape blossom, respectively spraying calcium propionate solution with a final concentration of 0.5-1.5% (w/v) in a young fruit period, in a middle fruit period, in a mature period and before picking; and after picking, grapes are put into a refrigerator or acold storage, wherein the preservation period is prolonged by 30 days or above compared with the preservation period of grape fruits which are not treated. The method disclosed by the invention has an obvious inhibition effect on common storage diseases of grapes; meanwhile, according to laboratory bacteriostatic experiments and field practical applications, the fruit cracking rate in the early stage of the grapes can be obviously reduced, the incidence rate and the falling rate of grapes in the field and in a post-harvest storage process can be inhibited, and the fruit quality can be well maintained. The method disclosed by the invention has the advantages of simple flow, no toxicity, no pollution and low cost and has a huge practical application value.

Description

technical field [0001] The invention belongs to the field of postharvest disease control of fruits and vegetables, and in particular relates to an antiseptic calcium propionate, formulation preparation, a preharvest application method and a method for effectively controlling grape postharvest disease during postharvest storage. Background technique [0002] Grapes are highly susceptible to microbial infection due to their high water content and sugar content, and their thin skins are easily damaged. Pathogenic fungi mostly intrude latently from the field, which can cause grape disease during post-harvest storage, causing grape rot and shattering. Botrytis cinerea, Alternaria, Colletotrichum, Aspergillus and other fungi are common pathogens that cause postharvest diseases of grapes. Among them, Botrytis cinerea will not only cause grape yield reduction during the flowering period, At the same time, its strong low-temperature growth ability and drug resistance make it the dom...

AI Technical Summary

Problems solved by technology

At present, the action mechanism of fungicides is relatively simple, and the propagation speed of pathogenic bacteria is fast, so the resistance is also fast, and the pollution is large and the residue is high, threatening human food safety.

Calcium propionate, as a new type, green, environmentally friendly organic salt, has less pollution, is degradable, and has the advantages of low toxicity, poor drug resistance, and high safety. It is usually used in food and medicine and other fields. At the same time, it has a significant effect on common pathogenic bacteria such as Aspergillus flavus and Fusarium, etc. on food and grain, but there is no report on the control method of applying calcium propionate to the field to control grape postharvest diseases and prolong the storage and preservation period.

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