Symptoms of lily base rot, also known as blight. The main damage lilies bulb base and scales, after the onset of the bulb base on the scales or scales brown decay, scale up along the scales, diseased scales often fall off from the substrate, and sometimes brown spots on the outer scales, light bulb disease symptoms are not Obviously, the base of the aboveground leaves are yellow and the diseased plants are short.
Pathogen Fusarium oxysporum f. sp. Lilii Snyd. Et Hans. The Fusarium spp. Lilium spp. Three strains of F1, F2, and F3 were produced on PDA medium, all of which had pathogenicity. F1 hyphae are white, colonies are luxuriant, small conidia are ovoid, with 0 to 1 separated, large conidiophore spindles slightly curved, with 3-5 divisions, membranous spores interspersed or terminal. Fz aerial mycelium pink, colonies more lush, small conidia chain, oval, size 6-103-4 (μm), large conidia meniscus, with 3-5 separated, size 17. 5-213.5-4.9 (μm); F3 airborne mycelium is white, colonies are sparse, and sticky. Small conidia are oval, 0 to 1 separated, one end of the figure 240 lily rot bacteria tips, the other end blunt, size 6.3 - 12.62.8-4.9 (μm); large conidia Meniscus type, 2-4 separate, tipped, size 17.5-352.8-7 (μm).
Transmission routes and pathogenic conditions The pathogens used mycelia in the bulbs or mycelia and sclerotia with the diseased bodies to overwinter in the soil, becoming the source of infestation at the beginning of the year. The disease often occurs concurrently with other underground root rot and scale rot of lilies. The diseased bulbous roots and contaminated soil are the major sources of infestation of the disease.
Prevention methods (1) Promote the application of compost and decomposed organic fertilizer made from Japanese enzyme bacteria to suppress harmful microorganisms in the soil. (2) Rational rotation. (3) Remove the diseased plant in time. (4) The storage pit is kept ventilated to avoid high humidity and overheating. (5) Sterilization of bulbs. The use of 43% formalin 120 times soaking for 3.5 hours, control effect is obvious. (6) Spray 36% Thiophanate-methyl Suspension 500-fold or 58% Metalaxyl Manganese Zinc Wettable 500-fold, 75%-chlorothalonil wettable powder 600-fold, 50% benomyl wettable Powder 1500 times, 60% anti-mildew Po 2 water-soluble powder 800 to 1000 times liquid.
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