Control methods of Potato Fusarium Wilt

Fusarium wilt of potato is a kind of soil-borne fungal disease on potato, which is widely distributed and occurs widely in all kinds of planting areas in China, which poses a threat to potato production, and the pathogen is complex, genetic variability is large, and stress resistance is strong. It increases the difficulty of the prevention and control of the disease. Let's take a look at the control methods of potato Fusarium wilt.

Damaging symptoms

The above ground part of potato wilted, the diseased stem was cut open, and the vascular bundles of potato became brown. when the humidity was high, the diseased part often produced white to pink hyphae.

Ways of transmission

The pathogen overwintered with mycelia or chlamydospores in the soil or on diseased potatoes. The conidia produced by the disease department in the following year were spread by Rain Water or irrigation water and invaded from the wound.

Disease condition

The disease is easy to occur in the field with high humidity, soil temperature higher than 28 ℃, continuous cropping land and low-lying land.

Prevention and cure method

1. 4-year rotation with Gramineae crops or green manure.

2. Selecting healthy potato to keep seed, applying mature organic fertilizer and strengthening the management of water and fertilizer can reduce the disease.

3. Irrigate 12.5% carbendazim concentrated solvent 300 times if necessary.