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Novel cucumber downy mildew-resistant seedling culture substrate

A cucumber downy mildew and seedling raising substrate technology, applied in planting substrates, culture media, horticulture, etc., can solve the problems of long working cycle for disease-resistant breeding, pathogenic bacteria resistance, and environmental pollution, so as to reduce field incidence and ecological Significant benefits and simple production methods

Inactive Publication Date: 2020-04-10
TAICANG LVFENG BIOLOGICAL ORGANIC FERTILIZER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the prevention and control of cucumber downy mildew mainly depends on the selection of disease-resistant varieties, followed by the selection of chemical agents for control, such as chlorothalonil, fosfo-aluminum, metalaxyl, mancozeb, propamocarb-metalaxyl, etc.; but , long work period for disease-resistant breeding, and repeated use of chemical pesticides can easily cause pathogenic bacteria to develop drug resistance and pollute the environment

Method used

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  • Novel cucumber downy mildew-resistant seedling culture substrate

Examples

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Effect test

Embodiment 1

[0031] Example 1: Greenhouse Test

[0032] (1) Test method: 2 treatments and 3 repetitions were set up in the test. 20 plants were planted in each repetition, and 10 continuous plants were taken for investigation. The seedlings cultured on the matrix were used as the control group. When the cucumber seedlings grew to 3 leaves and 1 heart, they were transplanted into the nutrient pots with two kinds of substrates under greenhouse conditions. When 5 true leaves grew, they were sprayed with cucumber downy mildew disease pathogenic bacteria, investigate the disease severity and calculate the biocontrol effect after inoculating the pathogenic bacteria 20 days, disease severity=∑(number of diseased plants at all levels×level value) / (total number of plants under investigation×highest level value)×100%; control effect=( Severity of disease in the control group - severity of disease in the treatment group) / severity of disease in the control group × 100%.

[0033] (2) Grading standards...

Embodiment 2

[0045] Embodiment 2: field test

[0046] (1) Test method: The planting method is direct seeding, planting in large pots, and the substrates used are biocontrol substrates and conventional substrates. There are 3 treatments in the test, which are biocontrol substrates, chemical conventional substrates, and conventional substrates. , each treatment was repeated 3 times, and 18 pots were planted in each repetition. A random block design was adopted, and guard rows were set between plots. The field experiment adopted a standard field management model. In order to better test the effect of preventing cucumber downy mildew, the new seedling substrate and one group of conventional substrates were not sprayed with any pesticides during the preliminary investigation, and the other group of conventional substrates was controlled by chemical pesticides. Spray chemical pesticides once after each investigation; survey takes 10 continuous pots in each plot, and conducts the first investigat...

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Abstract

The invention discloses a novel cucumber downy mildew-resistant seedling culture substrate which is prepared by the following steps: by taking 5 parts of sawdust, 2 parts of coco coir and 3 parts of decomposed organic fertilizer as organic agricultural wastes, carrying out pretreatment and primary turning and throwing, carrying out aerobic fermentation for 1-2 months in an aerobic fermentation period, and carrying out after-ripening fermentation for 1-2 months, and finally, carrying out sieving treatment and spraying a TDJN1 biocontrol bacterium agent, and detecting the seedling culture substrate synthesized with the biocontrol bacterium agent to determine whether the seedling culture substrate is qualified or not. According to the beneficial effects, in the seedling growing process, the overall quality of seedlings is improved through the novel seedling growing matrix and the resistance of cucumber seedlings to downy mildew is induced, so that the field morbidity is reduced, use of chemical pesticides is reduced, and the novel seedling growing matrix is simple in raw material, simple in manufacturing method and low in cost and has important application and popularization value.

Description

technical field [0001] The invention relates to the technical field of crop seedling-raising substrate development, in particular to a novel seedling-raising substrate resistant to cucumber downy mildew. Background technique [0002] The pathogen of cucumber downy mildew is Oomycota pseudoperonospermum genus Cuban pseudoperonospora, downy mildew mainly occurs on the leaves, the disease occurs at the seedling stage, chlorotic spots appear on the cotyledons at first, and gradually turn into yellow irregular spots, when the cotyledons are wet A gray-black mold layer is produced on the back, and as the disease progresses, the cotyledons quickly turn yellow and dry up. Onset at the adult plant stage, light green water-soaked spots appear on the leaves at the beginning, enlarged and restricted by the veins, they are polygonal, yellow-green to light brown, later the disease spots converge into pieces, the whole leaf is dry, curled upward from the leaf edge, moist Sometimes a gray-...

Claims

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Application Information

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IPC IPC(8): A01G24/23A01G24/25A01G24/20
CPCA01G24/20A01G24/23A01G24/25
Inventor 何胥沈文忠胡青青曹亚茹左其东李梅全坚宇
Owner TAICANG LVFENG BIOLOGICAL ORGANIC FERTILIZER CO LTD
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