Identification and control of ginger plague

Ginger plague, also known as ginger rot or ginger bacterial wilt, is the most serious disease in ginger production, with a wide range of hosts from ginger seedlings to ginger cubes during harvest and storage.

Ginger blast was originally caused by Pseudomonas solanacearum. The first infection comes from ginger seed disease or soil bacteria, and the pathogens of other host diseases such as peanut bacterial wilt and tomato bacterial wilt can also be transmitted to ginger.

The pathogen of ginger blast invaded from the wounds of ginger roots and tubers (mainly insect-eaten wounds). The injured roots were light brown at first, and the bacteria entered the ginger tubers along the vascular bundles, and the damaged ginger tubers also showed light brown water immersion at the initial stage, and the ginger lumps were still hard in this period. with the development of the disease, the ginger gradually changed from light brown to dark brown, the aboveground leaves curled and withered at first, and finally the ginger flesh rotted and stinked due to the invasion of other miscellaneous bacteria. Only the ginger skin was left, and the leaves on the ground changed from green to yellow.

The peak period of disease in the field is the high temperature and rainy season from June to August every year.

Prevention and control methods:

1. Disease-resistant varieties are selected: chicken claw ginger is disease-resistant; big meat ginger and Lou ginger are susceptible to disease.

2. Dry the ginger for two days before sowing, and remove the diseased ginger that becomes soft and has milky turbid liquid overflowing after sowing.

3. Seed soaking: after drying the seeds and removing the diseased ginger seeds, soak the seeds in clean or warm water for two days, so that the ginger seeds absorb enough water and drain.

4. Disinfection of ginger seeds: soak the ginger pieces with Qingkuding for 2 minutes before sowing, and cover the soil in time. ② soaked the seeds in 300x solution of 3KG or 800x solution of agricultural streptomycin for 20 minutes.

5. Crop rotation: it is better to rotate flood and drought or spring onion and garlic. If rotation with other crops requires about 4 years.

6. Field management: ① ploughs deep ploughing and turns soil for winter, applying 2000 kg organic fertilizer per mu; ② planting in high border and deep furrow; ③ separates drainage and irrigation, strictly forbids stagnant water in ditch; ④ soil adjusts acidity, sprinkling 100kg lime powder per mu before planting ginger; ⑤ does a good job in pastoral hygiene, so that diseased plants in the field should not be thrown away as soon as they are pulled, but should be collected and dried and burned or buried deep.

7. Chemical control: if ① uses the ginger field sown with Ralstonia solanacearum, it will continue to irrigate with Rhizoctonia solanacearum in April, May, June, July and August respectively, so that the bacterial wilt control bacteria will become the dominant population in ginger roots and protect ginger roots from Ralstonia solanacearum. The ginger fields without using Qingxuting in ② can be irrigated with 3% Ke Shikang 500m 800 times, plus rice 1000 times, agricultural streptomycin 800 times and 86.2% copper masters 1000 times in April, May, June, July and August, respectively.