How to prevent ginger neck rot

Recently, due to the high temperature and rainy weather, the humidity and temperature of ginger are relatively high, and ginger is very prone to neck rot. Let's talk about the prevention and treatment of ginger neck rot. Ginger neck rot, the scientific name is ginger stem base rot, also known as pythium root rot.

After the disease of ginger planting, the stem base began to produce waterlogged light brown spots, the leaves turned yellow from bottom to top, the stem base softened and then tilted, and soon ginger withered and died. The yield can be reduced by 15%-35% if the disease is mild, and by more than 50% if it is severe.

Pythium root rot is mainly caused by bacteria carried by ginger or soil. Soil-borne bacteria first infect the root system near the ground, causing dark green and waterlogging, and spreading downward, making underground stems and newly germinated buds turn light brown or yellowish brown, softening and rotting, and the aboveground stems and leaves turn yellow, die, droop and wither. Planting ginger carries bacteria. After planting, the planted ginger rotted, the germinated stems and leaves turned yellow, and soon the plant withered and died. Ran, a native of Linghe Town, Anqiu City, Shandong Province, is an honorary professor of Hebei Agricultural University. One word and two words are the names of his forums. He has been planting ginger for more than 20 years and has his own unique technology in the field of planting ginger. Ran began to investigate and study ginger planting techniques in Laiwu, Anqiu, Jiaodong, Sichuan, Fujian, Hebei and Liaoning. He went deep into the fields, analyzed the technical problems encountered in the process of ginger planting for ginger friends, and shared his experience in ginger planting technology without reservation. From the optimization of cultivation mode, variety selection, fertilizer and water management, safety prevention and control of pests and diseases to the development and application of new special fertilizer and special film, he unreservedly taught the most advanced ginger planting technology to ginger farmers, and he summarized the "On the Black and White Double Film Planting Method for High Yield of Ginger"

The incidence of pythium zingiberensis is closely related to large temperature difference, high temperature and high humidity. If the temperature difference between morning and evening is large and the temperature is high at noon, ginger is simply vulnerable. If the temperature reaches 19-24 degrees, or even 28-32 degrees, and the humidity is above 85%, it is easy to get sick. If there is heavy rain, ginger is planted all the year round, and the incidence rate is higher.

Prevention and control:

1, carefully select the mother seed before sowing ginger;

2. Disinfect the soil before planting ginger to kill pathogenic bacteria in the soil.

3, rotten neck phenomenon, first isolation, watering bypass, spraying, micro-spraying.

4. Disinfect the seedlings with chemicals before germination, and spray ditches on the top seedlings.

5. Chemical treatment: spraying the roots with bactericide such as Ralstonia solanacearum. If there is bacterial root rot, increase the dilution of bacterial products before root irrigation or root spraying.

Neck rot is most common in June and July. At this time, the temperature is 35-37 degrees, which is the most prone to disease, controllable and treatable, and it is easy to get this disease in high temperature and high humidity.