How to control root rot of ginger

Ginger generally grows in deep, moist soil, so the main part of the disease is the underground rhizome of ginger, and there are few diseases in the aboveground part, while the main underground diseases are root rot, as the name implies, mainly the symptoms of rhizome rot, which is a direct and serious disease. If you want to understand the occurrence and prevention of root rot, you can read this article carefully.

I. the cause of occurrence

The pathogen overwinters with mycelium on the remaining ginger or on rotten plants in the field, or on the diseased body, and then becomes the main source of infection in the next planting season. Bacterial transmission depends on the production of bacterial spores through Rain Water spatter or irrigation water to carry out, because it is a soil habit bacteria, so generally not through the wind to spread. It can invade directly from the rhizome. The main causes of disease are high planting density, heavy soil, lack of fertilizer, low-lying or stagnant water after rain.

2. Symptoms of injury

The pathogen often first infects the basal stem close to the ground, and then turns green and watery. Then it develops to the underground stem, which generally makes the bud of the underground stem turn brown, the aboveground part yellowed and withered, and the base of the stem rotted and finally fell to the ground. Ginger damage will appear in a state of invasion, and then the surface will be covered with a large white mold layer, which expands rapidly.

III. Prevention and control methods

1. Soak ginger

Before planting ginger, choose ginger that is disease-free and insect-free during storage, soak it in medicine for 10 to 20 minutes, and then sow it. Soak 100 jin of ginger with 200 grams of carbendazim wettable powder and 100 kg of water, then dry it in the shade and then plant it.

two。 Land selection and fertilization

Choose deep but dry, sunny, breathable and fertilized sandy loam to plant. Fertilization must be adequate to avoid plant growth due to lack of fertilizer and disease. Then the application of farm manure should ensure that it is completely mature and then applied to avoid the harm of carrying bacteria.

3. Spraying and filling root

At the initial stage of the disease, 70% methyl thiophanate wettable powder or 50% carbendazim wettable powder should be mixed with about 3 jin of soil and sprinkled at the base of the stem to improve the condition, spraying twice in a row, with an interval of three to five days. Then the disease area is large, and when the disease is serious, it is necessary to use 46.1% copper hydroxide water dispersible granules 500 × 1000 times or 75% chlorothalonil wettable powder 1000 times to irrigate the roots of the diseased plants, 100 ml per plant, once every 10 days, continuous irrigation for 2 to 3 times.

Root rot is the most serious disease of ginger after removing ginger plague. Generally, prevention can reduce the possibility of disease occurrence. If it occurs in the initial period of prevention and control is the best period, once serious, root irrigation will still have great losses. The above contents are welcome to read and refer to.