During yam cultivation, dead trees are a common phenomenon, especially in heavy crops, which can cause serious economic losses to growers. So why did yams die? What's the best way to prevent yams from dying?
1. Brown disease
This disease mainly affects leaves and stems. The affected leaves are round or oval, with gray-white to dark gray edges in the middle and dark brown edges. Later, the diseased areas There will be small black spots, and the middle part of the stem will be grayish white when the disease occurs, and the surrounding area will be black and irregular. The color disease will continuously cause the entire plant to become black and withered.
Measures:
For the prevention and treatment of brown spot disease, you can use 70% thiophanate methyl 1,000 times or 85% B Irrigating the roots with 3,000 times of alliin has better effect.
2. Fusarium wilt
In the early stage of the disease, the disease mainly manifests as a poke-like brown disease at the base of the stem. The disease causes the epidermis at the base of the stem to rot and the upper leaves to turn yellow and fall off. The vines wilt and the inside of the diseased stems turn brown. Tuber disease will cause irregular-shaped brown diseases to appear on the lenticels around the round branches. This symptom will lead to withering and death.
Measures:
For fusarium wilt, farmers can use 55% chlorobromoisocyanuric acid a thousand times or 40% methylthiocarbon sulfur suspension Use 600-fold solution of 70% dexamethasone zinc or 500-fold solution of 70% dexamethasone zinc for root irrigation.
3. Brown rot
Mainly affects the tubers of yam. After the tubers are infected with this disease, they will rot and turn irregular brown, slightly sunken, and the disease can be discolored after being cut open. , when severe, there will be disease and rot all around.
Measures:
For this disease, vegetable farmers can use 70% methionine 1,000 times or 85% ethyl alliin 3,000 times. Doubling solution is used for root control, once every two weeks, two or three times in a row.
Supplementary knowledge: Taboos on eating yam
1. Do not eat yam with carp and kansui.
2. Yams cannot be taken together with alkalis.
3. Yams are rich in vitamin C, while pig liver contains copper, iron, zinc and other metal trace elements. When vitamin C meets metal ions, it will accelerate oxidation and destruction, reducing the nutritional value, so eating pigs After suffering from liver disease, it is not advisable to eat yam.
4. Yams should not be eaten with cucumbers, pumpkins, carrots, and winter squash to prevent vitamin C from being decomposed and destroyed.