Method for preventing and controlling citrus black spot disease and improving citrus fruit quality

Abstract

The invention discloses a method for preventing and controlling citrus black spot disease and improving citrus fruit quality, including the steps of planting citrus plants in a greenhouse; during planting, closing a greenhouse skylight in rainy period from May to July every year while opening the greenhouse skylight in rain-less period; closing the greenhouse skylight in rainy period from Novemberthis year to January the next year, opening the greenhouse skylight to dissipate heat when internal temperature of the greenhouse is not less than 20 DEG C in rain-less period, otherwise, closing thegreenhouse skylight. In the high-incidence season of citrus black spot disease from May to July, the greenhouse skylight is opened in the rain, so that rainwater is prevented from attaching to branches, leaves and young fruits of the citrus plants from the greenhouse skylight; therefore, contact between young fruits, branches and leaves of the citrus plants between rainwater is cut off, spreadingof black spot disease is stopped, and the incidence rate of black spot disease of the citrus plants approaches zero. Besides, as the picking period of the citrus plants is delayed to January the nextyear from November every year, fruit quality losses due to freeze injury and rainwater impact are avoided.

Description

technical field [0001] The invention belongs to the technical field of citrus planting, and in particular relates to a method for preventing and treating citrus black spot and improving the quality of citrus fruits. Background technique [0002] The causative agent of citrus black spot disease is Mysteria citrus, and three conditions must be met at the same time for the transmission of black spot disease: suitable temperature, rain, and wounds; young citrus fruits, shoots and young leaves are most susceptible to infection. Numerous brown, dark brown scattered or densely integrated hard colloidal small particles are produced on the surface of the diseased part. The surface of these hard colloidal small particles is rough and slightly raised, which seriously affects the appearance and commerciality of citrus. Therefore, effective control of citrus black spot disease is the top priority in citrus planting work. [0003] At present, the prevention and treatment of citrus black ...

AI Technical Summary

Problems solved by technology

[0004] Because black spot disease is difficult to control, it is difficult to achieve significant effect by simple chemical control, and the control effect of a single chemical application is not significant, so it is necessary to carry out drug intervention in multiple citrus growth periods

At present, the main research direction for the prevention and treatment of black spot disease is to develop agents with better control effects, but drug development is difficult, and long-term use of drugs will also lead to drug resistance of pathogens; at the same time, the use of drugs will not only cost a lot of labor costs, but also The impact on food and environmental safety is also unknown

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