Tulip Pythium root rot
The disease can be caused by ultimate Pythium, abnormal female Pythium and intermediate Pythium, all of which are caused by oomycetes. The pathogen overwinters in the diseased bulbs, diseased roots and soil, and often spreads with the movement of the diseased soil. The soil temperature is high, the drainage is not timely after rain, and the moisture retention time is long.
Symptoms: at the beginning of the disease, translucent water stains appeared in the root, which caused the vascular bundle group after enlargement.
Weave browning, causing root rot. After the bulb was infected, gray spots appeared around the base of the bulb, the edge was brown, and the bulb was soft and rotten in severe cases, and the bulb did not emerge or developed poorly or even shrunk after emergence.
Prevention and cure method
(1) promote crop rotation.
(2) select high dry land to plant tulips.
(3) in the areas where the disease is serious, the amount of bacteria in the previous crop can be sprayed with 66.5% Pulicol 500 times or 30% carbendazim 600 times 700 times.
(4) at the initial stage of the disease, 80% Luheng 2 wettable powder 800 times solution and 50% Genfuling wettable powder 800 times solution were sprayed.
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tulip rot sclerotinia
Tulip rot sclerotinia disease, pathogen belongs to semi-known fungus sclerotinia, mainly harm seedlings and bulbs. After the seedlings are infected, the leaflets die as soon as they are pulled out. Bulbs damaged, external scales occurred soft rot, and in the infected part and the surrounding soil surface appeared many white silk hypha, after the formation of many rapeseed sclerotia. After the formation of many sclerotia, sclerotia initially white, brown after. Pathogenesis of this disease depends on mycelium and sclerotia transmission, sclerotia winter in the soil, in high temperature and high humidity conditions, the disease occurs heavily. A, collection.
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Local techniques for propagation and cultivation of tulips
Producing area and habit tulips prefer loose and fertile sandy soil with high dryness and good drainage, growing well in leeward and sunny places, but should be properly shaded in summer. Cold-resistant, moisture-resistant, do not like the sun, winter temperature in-3 ℃-5 ℃ fashion can grow, strong adaptability. The flowering period of tulip can be divided into early, middle and late, early flowering in March and April, middle flowering in April and May, and late flowering in late May. The florescence is short. Tulip is a spring bulb flower with early flowering and bright colors. It is a beautiful flower embellished with spring scenery.
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