MySheen

Licorice root rot

Published: 2024-11-08 Author: mysheen
Last Updated: 2024/11/08, Latin name: Rhizoctoniasolanikuhn damage symptoms: infected plant leaves turn yellow and wither, stem base and main root all become reddish brown dry rot, with longitudinal cracks or red stripes, lateral roots have rotted or few, the diseased plant is easy to pull out from the soil, the vascular bundles of the main root become brown, and the root grows 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-known subphylum fungal characteristics: Fusarium is a soil resident bacteria, in the soil

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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