How to prevent and cure spinach virus disease

Spinach, spinach of the subfamily Chenopodiaceae of the amaranth family, is an annual or biennial herb. Also known as spinach, Persian grass. Use leaves and tender stems for food. Spinach is native to Persia and was cultivated 2000 years ago. Later spread to North Africa, from the Moors to Western Europe, Spain and other countries. Spinach was introduced into the Tang Dynasty in 647. Spinach main root is well developed, fleshy root is red, sweet and edible. Spinach is a cold-tolerant vegetable and a long-sunshine plant. Northern China also has winter sowing and spring harvest, commonly known as buried spinach. It can be broadcast or broadcast. The main diseases of spinach are downy mildew, virus disease, anthrax, and the main pests are aphids, leaf miners and so on.

Morphological characteristics of spinach

Spinach can be up to 1 meter high and without powder. Roots conical, reddish, less white. Stems erect, hollow, fragile and succulent, unbranched or with a few branches. Leaves hastate to ovate, bright green, tender and succulent, slightly glossy, entire or with a few dentate lobes. Male flowers integrate globose glomerules, then arranged in interrupted spike panicles on the upper part of branches and stems; tepals usually 4, filiform, flattened, anthers without appendages; female flowers clustered in leaf axils; bracteoles slightly flattened on both sides, apical residual 2 denticulate, abaxially usually with 1 spinous appendage; ovary globose, stigmas 4 or 5, extended. Utricle ovate or suborbicular, ca. 2.5 mm in diam., flattened on both sides; pericarp brown.

How to prevent and cure spinach flower virus disease?

Introduction of spinach flower virus disease

Spinach virus disease, also known as mosaic disease. It has been developed in recent years, and the harm in some areas is relatively serious.

The symptoms of spinach mosaic virus disease were as follows: the heart leaves of the injured plants shrunk or showed a mosaic shape, the old leaves withered and fell off early, and the plants curled into a ball. The diseased plants infected with cucumber mosaic virus showed small and deformed leaves, shortened internodes, and new leaves yellowed; the diseased plants infected with turnip mosaic virus formed irregular, thick and light spots on the leaves; the leaf edges curled upward; in the plants infected with sugar beet mosaic virus, the veins were transparent and the new leaves turned yellow, resulting in mottling and downward curling.

Pathogen of spinach flower virus disease: overwintering on overwintering spinach and field weeds, the disease is mainly transmitted by aphids in the field. In the dry year in autumn, the disease of root stubble spinach and protected spinach was more serious. It is warm in early spring, and the disease of spring spinach is serious. The disease of spinach in early sowing land, wind field and near radish and cucumber field was serious.

Prevention and control of spinach flower virus disease:

1) physical prevention and control. Hanging silver-gray cloth strips in the protected area can play a role in avoiding aphids.

2) Integrated prevention and control.

First, cultivation measures. Choose the land with good ventilation and far away from radish and cucumber to grow spinach; in case of spring and autumn drought, more watering can reduce the disease; apply enough organic fertilizer, increase phosphorus and potassium fertilizer, and improve disease resistance.

The second is to clean the countryside. In winter and early spring, weeds in fields, fields and ridges should be cleared, and diseased plants should be thoroughly removed and taken out of the field for deep burial or burning.

The third is chemical prevention and control. Timely use of pesticides to control aphids, especially in spinach seedling stage. Can spray 20% of virus A wettable powder 500 times liquid, or 5% bacterial toxin clear water agent 300 times liquid, antiviral agent 1 300 times liquid, enhance immunity before or at the initial stage of the disease.