The application of a kind of plant inducer containing Rhizoma sagitta polysaccharides to prevent plant diseases
A technology for plant resistance and plant disease, which is applied in the field of pesticides and can solve problems that have not yet been discovered.
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Embodiment 1
[0024] Example 1: The test of preventing wheat powdery mildew by Sacredvine polysaccharides
[0025] The Caulis sagelicula polysaccharide prepared in the above-mentioned preparation examples was formulated into a 0.1 mg / mL aqueous solution of the sagecabula polysaccharide, and then the aqueous solution of the sagecabula polysaccharide was sprayed on the potted wheat leaves of 2 leaves and 1 heart stage with consistent growth, every Spray once every 2 days, spraying 3 times in total, and repeat 3 times for each treatment. The control group was treated with the same concentration of amino-oligosaccharides, and the blank group was replaced with water. Two days after the last spraying, the powdery mildew conidia were inoculated by the spore shake-off method, and the amount of spores was controlled at about 25 spores per field of view under a 10×10 magnification electron microscope. After 7-10 days, after the incidence of blank control wheat plants stabilized, the incidence of whea...
Embodiment 2
[0029] Embodiment 2: The test of the prevention of strawberry botrytis by the polysaccharide of Rhododendron sagitta
[0030] The above-mentioned preparation examples prepared the Caulis sanctum polysaccharides prepared into a 0.1 mg / mL aqueous solution of the Caulis sanctum polysaccharides, and then the aqueous solution of the Caulis sanctum polysaccharides was sprayed on uniformly growing strawberry plants, and each treatment was repeated 3 times. The control group was amino oligosaccharides of the same concentration, and the blank group was replaced with water. After 24 hours, spray and inoculate the strawberry seedlings with a suspension of Botrytis cinerea spores, and the spore concentration is 20-30 spores per field of view under the microscope. After 7-10 days, after the incidence of blank control strawberry plants stabilized, the incidence of strawberry gray mold was counted and the control effect was calculated.
[0031] See Table 2 for the results of the resistance ...
Embodiment 3
[0034] Example 3: Test of Preventing Potato Late Blight by Polysaccharides of S.
[0035] The above-mentioned preparation examples prepared the Rhizoctonia polysaccharides prepared into 0.1mg / mL of Rhizoctonia polysaccharides aqueous solution, then sprayed the Rhizoctonia polysaccharides aqueous solution on the potato leaves with a plant height of about 15cm, each treatment was repeated 3 times, and the control The same concentration of amino oligosaccharides was used in the group, and the blank group was replaced with water. After 24 hours, the germinated potato late blight spore suspension (1.3×10 4 per mL) on the leaves, and after 7-10 days, the incidence of potato late blight was counted and the control effect was calculated after the incidence of blank control potato plants stabilized.
[0036] See Table 3 for the anti-potato late blight resistance results of S. It can be seen from Table 3 that the polysaccharides of Rhizoma sagitta has a good preventive effect on potat...
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