Composition for preventing and controlling plant powdery mildew and its preparation method and application
A powdery mildew and composition technology, applied in the field of plant powdery mildew prevention and control compositions and preparation fields, can solve the problems of low bactericidal activity, low drug resistance, safety, etc. high effect
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example 1
[0028] Example 1: Indoor virulence assay for strawberry powdery mildew
[0029] The target of the test is strawberry powdery mildew. The test uses the co-toxicity coefficient method to evaluate the joint toxicity of the compound preparations to clarify a more reasonable ratio.
[0030] The biological activity of the agents was determined by the spore suspension spray inoculation method. The laminarin and sea cucumber saponin were dissolved and diluted with water respectively to prepare a series of medicinal liquids, which were sprayed, and each treatment was repeated 4 times. After 24 hours, take the strawberry leaves covered with powdery mildew, gently wash the fresh spores on the back of the leaves with sterile water, filter them with double-layer gauze, make a suspension with a spore concentration of about 100,000 / mL, and spray inoculate (pressure 0.1 MPa). After inoculation, the test materials were air-dried naturally, and then moved to a constant temperature room under ...
Embodiment 1
[0045] The composition for preventing and treating powdery mildew of plants is prepared by the following method: first add laminarin and sea cucumber saponin to an appropriate amount (50%) of deionized water, then add sodium lauryl sulfate, phytic acid and sodium benzoate sequentially while stirring, and then Then add deionized water to make it up to 100%, stir and mix evenly, and you can get a sample of the plant powdery mildew control composition, which includes 0.5% laminarin, 0.5% sea cucumber saponin, and 3% sodium lauryl sulfate. , phytic acid 0.4%, sodium benzoate 0.5%, deionized water balance.
Embodiment 2
[0047] The preparation method of sample in the present embodiment is similar to embodiment 1, and difference is that the consumption of each component is different during preparation, specifically as follows:
[0048] A composition for preventing and treating powdery mildew of plants, comprising 1% laminarin, 0.2% sea cucumber saponin, 4% sodium lauryl sulfate, 0.8% phytic acid, 0.4% sodium benzoate, and the balance of deionized water.
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