A Detailed Guide to the Latest Control Methods for Strawberry Bacterial Wilt
Strawberry bacterial wilt is a disease of strawberries that mainly affects the stem of the plant, so it is also known as strawberry stem wilt. This disease occurs in every nectar-producing region of our country, and in recent years its incidence has gradually increased, seriously affecting the development of the strawberry industry. So how should strawberry bacterial wilt be controlled? Let us find out together.
1. Disease symptoms
Strawberry bacterial wilt is caused by a type of Ralstonia bacterium. After infection, the plant gradually develops rust-colored spots, which gradually spread into the interior of the stem; the rust color gradually deepens, becoming brown in the middle stage and black in the later stage, until the plant dies. In the early stage, the plant may appear wilted, somewhat similar to sunscald, and will recover after watering or at night; in the middle and late stages of the disease it will remain wilted continuously, and at the same time rust-colored spots as described above will appear at the root crown, so care must be taken when identifying it.
2. Patterns of occurrence
The occurrence of bacterial wilt is mainly related to temperature and humidity; the hotter and more humid the environment, the more likely this disease is to occur, specifically at temperatures above 22 degrees and humidity above 40%. In addition, bacterial wilt is also very likely to occur at the seedling stage and the late harvest stage. At the seedling stage the plant's resistance is weak and it is very easily infected by the pathogen; at the end of harvest, because the fruit has just been picked, the plant has lost a large amount of nutrients and at the same time has weak disease resistance, so the pathogen takes the opportunity to invade and cause the plant to become diseased.
3. Control methods
A great deal of experience shows that the best way to prevent bacterial wilt is rotation between flooded and dry cultivation. In addition, bacterial wilt also harms solanaceous vegetables such as tomato, eggplant and chili, so reasonable rotation with these crops is also necessary. When establishing the planting site, choose a plot with smooth drainage, good ventilation and ample sunlight. Before planting, deep-plow the soil to a depth of 30 cm, then disinfect it after drying in the sun. After planting, strengthen field management, promptly remove dead branches and fallen leaves, and after rain pay attention to field drainage conditions to avoid the occurrence of a high-temperature environment. At several key points in strawberry growth, spraying can be used for control: first, spray a fungicide at the seedling stage, and before mulching, drench the roots with agents such as agricultural streptomycin. After heavy rain, spray Bordeaux mixture to disinfect. If the plant has already become diseased, targeted spraying of some agents for controlling bacterial wilt can be used to control the spread of the disease and prevent it from developing further.
The above is an introduction to control methods for strawberry bacterial wilt. We hope it can help you. To learn more related knowledge, please stay tuned to us.