What is the transmission route of potato black shank disease? How to prevent it?

What is the transmission route of potato black shank disease? How to prevent it?

The main cause of potato virus disease is virus infection. The main ways are contact transmission, insect vector transmission, seed potato transmission and soil transmission. Poisonous seed potatoes and pests are the main sources of infection, mainly aphids. In addition, friction, farm tools, people, livestock and mouthworms can also spread. Poor field management conditions, serious aphid occurrence, variety disease resistance and cultivation measures all affect the occurrence of diseases.

Potato black shank disease is very harmful to potatoes. Black shank disease, also known as black foot disease, can infect potato stems and diameter blocks. The onset period of black shank disease is long, which may occur from seed potato germination to later stage, especially at seedling stage.

(1) After being cut into pieces, the potato with the strain spreads among the diameter blocks and infects the healthy diameter blocks. Directly lead to the diameter block rot or no bud.

(2) For diseased plants, germs will spread through irrigation, rain and insects, and infect healthy plants.

(3) During the storage of harvested seed potatoes, germs will infect healthy potato pieces through wounds or lenticels.

Before potato planting, potato seeds must be screened and tested in strict accordance with the requirements to avoid the phenomenon of potato seeds carrying poison. Only by thoroughly eliminating the source of the disease can we avoid the influence of virus disease on potato growth.

Seed potato infection first starts from the navel and then spreads radially around. Cross-cutting the diseased part can reduce the dark brown color of vascular bundles, which will be accompanied by foul smell when it is high and humid.

Measures such as high ridge and deep ditch, formulated fertilization, shallow irrigation, timely sowing, uprooting of diseased plants, spraying aphid control drugs and weeding can reduce the occurrence of diseases. It is best to choose the land with no pollution sources around, flat terrain, fertile soil, rich organic matter and good irrigation and drainage in Gao Qian as the planting land.

If you want to control pests and diseases, it is very important to learn the knowledge of prevention in advance and understand the transmission routes and onset conditions of pests and diseases.