How to control white rust of amaranth

Amaranth, formerly known as amaranth, alias: Yanlaihong, old and young, tricolor amaranth, Latin name: Amaranthus tricolor, amaranth, amaranth annual herbs, stems stout, green or red, often branched, hairy or glabrous when young. The body of amaranth is soft and smooth, with a strong flavor, sweet and fragrant in the entrance, and has the effect of moistening the intestines and stomach and clearing heat. Also known as "sunflower", "crab vegetable", "braised vegetable", "braised vegetable". Some places are also known as "red mushroom tiger", coriander, Yuntian vegetables, cold vegetables and so on.

The main value of amaranth

Stems and leaves are eaten as vegetables; leaves mixed with various colors are used for viewing; roots, fruits and whole herbs are used as medicine, which have the effect of discerning eyes, defecating and defecating, and removing cold and heat.

The efficacy of amaranth

Amaranth can replenish qi, clear heat, clear eyes, smooth fetus, benefit large and small intestines, promote the growth of teeth and bones, maintain normal myocardial activity and prevent muscle spasm. It also has the functions of promoting blood coagulation, increasing hemoglobin content, improving oxygen-carrying capacity, promoting hematopoiesis and so on. It can also lose weight and clear the body, promote detoxification and prevent constipation.

Amaranth leaves are rich in calcium that is easily absorbed by the human body, which can promote the growth of teeth and bones, maintain normal myocardial activity and prevent intramuscular spasm. It is also rich in iron, calcium and vitamin K, which can promote blood coagulation.

Amaranth is rich in dietary fiber, regular food can lose weight, promote detoxification, and prevent constipation. At the same time, often eating amaranth can enhance the physique, which is higher than eggplant fruit, and is known as "longevity vegetable".

Amaranth can promote the growth and development of children, and the content of iron and calcium in amaranth is higher than that in spinach. It is also suitable for anemia patients, women and the elderly to eat, maintain normal myocardial activity, promote blood coagulation, hematopoiesis and blood carrying oxygen function.

How to prevent and cure white rust of amaranth?

1) symptoms of amaranth white rust: mainly harmful to leaves. Irregular discoloration patches appear on the leaf surface, and the leaves are dorsally round to amorphous white blister spores, 1mm in diameter. In severe cases, blister spots are densely covered or connected, and the leaves are uneven and eventually withered and yellow, unfit for consumption.

2) the occurrence condition of amaranth white rust: it is a fungal disease. In cold areas, the pathogen overwintered in the soil with oospores. In the following year, oospore germination produces sporangia or germ tube infection. In warm areas, the pathogen was infected by sporangia and spread by airflow or Rain Water sputtering to complete the annual cycle of the disease. The optimum temperature for sporangium germination is 10 ℃, and sufficient water and wet conditions are needed. The disease was serious in rainy weather and partial application of nitrogen fertilizer.

3) the prevention and control of amaranth white rust:

① selected seeds from disease-free plants and mixed them with 25% Redomir wettable powder of 0.2% seed weight to 0.3%, or 64% antiseptic alum wettable powder before sowing.

② should strengthen fertilizer and water management, appropriately close planting, clear ditches and drainage to reduce dampness, and avoid partial application of nitrogen fertilizer.

③ medicament prevention and cure: spray 58% Remicol at the initial stage of the disease. Manganese and zinc wettable powder 500 times liquid, or 50% nail cream copper wettable powder 600 times liquid, or 64% poison alum wettable powder 500 times liquid, or 60% nail cream aluminum copper wettable powder 500 times liquid, pay attention to alternate use of the above agents, once every 7 times 10 days, spray 2 times 3 times.