Control of Penicillium bulb Penicillium in Lily
Symptoms: occur during storage. The disease spot on the bulb is sunken, dark brown, the upper turquoise mildew layer (spore mass), the internal scales gradually rot, and finally cause the bulb dry rot. It usually takes two or three months for the bulb to rot completely.
Pathogen: PenicilliumcyclopiumWestl. It belongs to the subphylum of fungal penicillium, hyphomycetes, Penicillium, Penicillium. Colony dark blue-green, without or inconspicuous wheel patterns, granular or clustered, abaxially light pink, occasionally yellow or purplish. Conidiophores 3-3.5 μ m in diameter, broom-shaped branches with three layers, 3-3.5 μ m in diameter, and peduncles 7 × 10 × 2.5 μ m. Conidia are subglobose, smooth or slightly rough, 3 to 4 microns in diameter. In addition, P.corymbiferumWestendorp is also harmful to lilies.
Disease conditions: injury of bulb, dampness of storage place and poor ventilation are easy to cause infection of Penicillium.
Route of infection: the bacteria are distributed in the air and soil. If there are pathogens attached to the surface of the bulb, it will multiply in large numbers in the event of high temperature and high humidity. The disease can occur in the process of harvesting, packing and transporting bulbs. Germs invaded from the wound.
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Lily scale propagation method
There are four methods of lily reproduction: scale, bulb, bulb, seed propagation. Seed and bulb propagation, late flowering, easy to produce variation. Bulb seedling cultivation has the advantages of early flowering, low propagation coefficient, large seed consumption and high cost. Therefore, a large number of seedlings, the use of scale propagation. 1. Seed selection. In lily scale propagation, excellent varieties should be selected, bulbs with fully mature, disease-free and fat scales should be selected, and the scales with thick and complete outer layer should be stripped for seed. 2. Seedbed finishing. Lily scale seedling, seedling bed is required to be underground
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Lily Fusarium wilt
Latin name: Fusariumoxysporumf.sp.liliSnyderetHansen is harmful to crops: Lily is harmful to symptoms: also known as stem rot, is an important disease in lily production. At the initial stage, the infected plant showed slow growth, the lower leaves yellowed and lost luster, and then the symptoms gradually spread upwards. finally, the leaves of the whole plant wilted and drooped, browned and withered. In addition, the specific type of Fusarium oxysporum lily can also infect the base of the bulb skin, and brown necrosis or rot appears on the base plate.
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