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A method of using ultraviolet light to prevent early blight of tomato in greenhouses

A tomato early blight and ultraviolet lamp technology is applied in the field of using ultraviolet lamps to prevent and control tomato early blight in greenhouses. Effect

Active Publication Date: 2019-07-02
财农科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical pesticides will cause pests to develop resistance, and will also cause pollution to the crops themselves and the surrounding environment; biological pest control, although it will not cause other public hazards, but the types of pests to be controlled are limited, and some pests are still "at large"

Method used

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  • A method of using ultraviolet light to prevent early blight of tomato in greenhouses

Examples

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example 1

[0015] Example 1, according to the above-mentioned content of the invention, propose detailed operation steps

[0016] 1. Determination of the pathogenicity of Phytophthora tomato by ultraviolet light irradiation

[0017] Collect the diseased strains of Phytophthora tomato, isolate and purify the pathogens in the laboratory, and obtain purified pathogenic bacteria; pick the purified pathogenic mycelia and inoculate them on potato agar medium, cultivate them at 25°C for 48 hours, and then open the culture dish, and placed under different UV irradiation conditions;

[0018] ① Pick colonies from the UV-treated petri dish at the center of the petri dish, inoculate them on PDA medium, and culture them for 48 hours under dark conditions at 25°C to measure the growth of the colonies;

[0019] serial number 1 2 3 4 5 6 7 Irradiation time (min) 15 30 45 60 75 90 105 Average spore production (pcs / ml) 10 8

10 6

10 6

10 5

10 4

10 4

...

example 2

[0030] Example 2, the control method of the present invention is compared with conventional pesticide control, and measures the control effect;

[0031] (1) At the early stage of disease occurrence, 75% chlorothalonil wettable powder 600 times liquid, 50% thiophanate wettable powder 600 times liquid, 70% mancozeb 700 times liquid were used alternately, and sprayed every 10 days Medicine 1 time, continuous spray 3 times.

[0032] (2) Set up a 100w UV-B lamp tube (240nm-340nm) in the greenhouse; use a 0.08mm cellulose acetate film to coat the UV-C ultraviolet lamp with a wavelength component below 253mm; about 1.5 meters from the ground, mutually Install ultraviolet lamps vertically, one for every 20 to 30 cubic meters of space, and the ultraviolet rays are irradiated at an angle of 60 to 80 degrees to the horizontal plane; When it is stable, start to irradiate for 45 minutes, which has an inhibitory effect on tomato early blight. Continuously irradiate for 7 days, and then irr...

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Abstract

The invention relates to the technical field of pest control, particularly a method for controlling early blight of greenhouse tomatoes by using an ultraviolet lamp. The invention aims to provide a method for producing pollution-free vegetables according to the actions of control of wavelength radiation dose on tomato early blight spore germination, germ tube extension and hypha growth inhibition. The ultraviolet lamp has great destructive power on deoxyriboneucleic acid (DNA) and ribonucleic acid (RNA) of pathogenic bacteria, and enables the pathogenic bacteria to lose survivability and fertility, thereby destroying the pathogenic bacteria. The method can implement nucleic acid mutation, replication inhibition, transcription blockade and protein synthesis, or can generate free radicals capable of causing photoionization, thereby resulting in cell death and further implementing sterilization. The sterilization efficiency is up to 99%; and the method has the advantages of favorable sterilization effect and high acting speed.

Description

technical field [0001] The invention relates to the technical field of pest control, in particular to a method for controlling early blight of tomato in greenhouses by using ultraviolet lamps. Background technique [0002] Worldwide crop losses due to pests are estimated to be as high as $100 billion per year. In order to kill farmland pests, agricultural scientists have tried their best, but the previous methods of killing insects are not very effective. Chemical pesticides will cause pests to develop resistance, and will also cause pollution to the crops themselves and the surrounding environment; biological pest control, although it will not cause other public hazards, but the types of pests to be controlled are limited, and some pests are still "at large". [0003] The action of ultraviolet radiation on the "bacteria-plant" disease system affects the occurrence and development of plant diseases, mainly including two aspects: one is the photobiological effects of UV radi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G13/00
Inventor 徐立江
Owner 财农科技集团股份有限公司
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