Licorice root rot
Latin scientific name: Rhizoctoniasolanikuhn
Symptoms of damage: the leaves of infected plants turn yellow and wither, the stem base and main root all become reddish brown dry rot, there are longitudinal cracks or red stripes on them, the lateral roots have rotted or few, the diseased plants are easy to pull out from the soil, the vascular bundles of the main roots become brown, and the roots grow powdery mildew when the humidity is high.
Morphological characteristics of pathogens: generally caused by nematodes and rot mold.
Taxonomic attribute: Rhizoctonia solanacearum, belonging to semi-knowns subphylum fungi
Characteristics of the disease: Fusarium is a soil resident fungus, which is saprophytic for a long time in the soil. The pathogen spreads through water flow and tillage, and invades through the root wound or directly from the fork root branch crack and the crack at the base of the stem of the aging seedling. The wound caused by underground pests and nematodes is beneficial to the invasion of bacteria. The land with extensive management, poor ventilation and moisture retention is easy to occur.
Prevention and control methods: 1. Control soil temperature to prevent moisture retention. 2. Rotation, strip sowing or high border cultivation. 3. Prevent the seedlings from causing wounds in the process of storage, transportation and transplanting. Pay attention to the control of underground pests. 4. Soak the seedlings with the mixture of 50% carbendazim and Licobacter at 1:1 for 5 minutes, dry for 2 hours, and then transplant, the control effect is high. 5. Spray or irrigate 50% methyl thiophanate or carbendazim wettable powder 800m 900 times overnight, 50% carbendazim wettable powder 1500 times.
Common medicament: 50% carbendazim 50% carbendazim wettable powder
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Processing technology of licorice melon seeds
1. Raw materials: Cook soup with 5% licorice, 3% salt and 0.05% saccharin with water. 2. preparation method: wash the black melon seeds, dry them, and burn them in a hot pot until they are hot. Switch to gentle fire and sprinkle the cooked soup, stir-fry and sprinkle until the melon seeds turn yellow.
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Key points of High-benefit cultivation and Management of Glycyrrhiza uralensis
(1) Glycyrrhiza uralensis Fisch has strong adaptability for land selection and preparation, and most soils can be planted except saline-alkali soil. Apply stable manure or compost as base fertilizer in autumn, turn more than 20 cm deep, rake flat to make a border, the border is 1 meter wide and 17 cm high, and sow seeds in small trenches on the border surface when planting. (2) the method of reproduction is seed propagation and rhizome propagation. 1. This method can be used for seed propagation to enlarge the area. (1) seed treatment in the natural state, the hard seed rate of licorice seeds is more than 80% and 90%, and the seed treatment before sowing is the key to high yield.
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