Ginger disease is a bacterial disease caused by Pseudomonas gingivalis. Once the disease occurs in ginger, the yield will be reduced, and the disease will be produced completely. In recent years, the disease has been increasing year by year and it has become an important factor restricting ginger production. After years of research and field experiments, we have demonstrated that the occurrence and spread of ginger aphid can be effectively controlled through comprehensive prevention and control measures.
1. Harmful symptoms
Ginger's fungus mainly infects underground stems and roots. After flesh stalks are invaded, they begin to appear watery, and the epidermis turns yellow-brown. It loses luster and gradually softens and rots from the internal tissues, leaving only the outer skin. Rice watery sap and emits odor. The roots were also damaged by yellowish-brown rot. The above-ground stem was dark purple, and the internal tissues turned brown and rot, leaving only fibers. The leaves withered, the leaf margins curled, and the color was light yellow, until the entire plant drooped and died.
2. Transmission route
The long-distance transmission of the pathogenic bacteria relies mainly on the culturing of spores of Ginger. Field propagation is usually spread by the use of flowing water, pests, diseased soil and sick bodies carried by farm implements, and agricultural operations. Contaminated ginger seeds develop in the growing period and become spread and spread in the field. The disease is hot and humid, and it is prone to occur when the weather is rainy and sunny. Especially when the soil temperature repeatedly changes, it is beneficial to the occurrence of the disease. The above-ground parts grow poorly, yellowing, withering, and the plants die as the disease progresses.
3. Comprehensive prevention
(1) Rotation of crop rotation: Choose a plot with good soil fertigation and irrigation for rotation, and make a round of three years.
(2) Ginger seed treatment: ginger seed soaking with 1:1:100 Bordeaux mixture for 20 minutes, streptomycin sulfate 500 ppm soaking for 48 hours or 40% formalin 100 times for 6 hours for germination The surface is 5~10cm higher than ginger.
(3) Formula fertilization: Reapply organic fertilizer, increase phosphorus and potassium fertilizer, avoid partial nitrogen fertilizer, and promote the use of high-quality farmyard fertilizer. The organic matter content in the soil is 1%, available nitrogen is 80ppm, available phosphorus is 50ppm, and available potassium is 100ppm.
(4) Proper close planting: It is advisable to plant about 5,500 piers per mu to prevent excessive density, change the microclimate in the field, improve the ventilation and light transmission conditions, and reduce the humidity in the field. Reduce the number of strokes and prevent accidental damage.
(5) Eradicate diseased plants: Eradicate diseased plants in field centers in time, transport them to the field for centralized destruction, and do not discard fields at will. Around the disease points, 5% blue fleas, streptomycin sulfate and other agents were used to burrow or use lime to spread disease points and around them. The filling was used to build solid burrows around the diseased burrows to prevent the flow of pathogens.
(6) Chemical control: Before the flood season, use Keziling 1000 times to irrigate the roots twice, the interval time is 15 to 20 days, to prevent the occurrence of ginger rickets. From the beginning of July to the end of August, spraying once every 10 days, with 50% amorous copper 500 times, or 1:1: 100 Bordeaux mixture, or 75% bacteria net 500 times the whole plant uniform spray control, per acre Use liquid 50-75 kilograms, can effectively prevent the occurrence and spread of ginger rickets.
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