Accurate resistance identification method of black rot of sweet potato at seedling stage
A technology for resistance identification and black spot disease, applied in the field of agricultural plant protection, can solve the problems of lack of identification of sweet potato black spot resistance, and achieve the method of avoiding spore fluid infecting potato seedlings, the method is scientific and fast, and the identification results are accurate and reliable. Effect
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[0033] like figure 1 Shown, a kind of seedling stage sweet potato black spot precise resistance identification method specifically comprises the following steps:
[0034] 1) Isolation and activation of the pathogen: Collect the diseased potato pieces from the field, isolate and purify the sweet potato black spot fungus by the tissue isolation method and the single spore isolation method, and after the verification of the Koch's law, use the potato dextrose agar medium to cultivate for 7 days. spare;
[0035] 2) Preparation of PS culture medium: Weigh 20g of potatoes and add 1L of ultrapure water to boil until the potatoes are completely rotten and soft. Autoclave at 121°C for 15 minutes for later use;
[0036] 3) Shaking culture of pathogenic bacteria: Take out the activated sweet potato black spot bacteria, use a hole puncher with a diameter of 6mm to punch out the bacteria discs, inoculate 20 bacteria discs in each triangular flask, and place the inoculated triangular flas...
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