Key points of prevention and control of red spot of lentil

Lentils are annual herbs, alias falx lentils, rattan beans, along the hedge beans, magpie beans, beans, moon vegetables, dicotyledonous plants. There are also many kinds, such as white lentils, purple lentils, oil beans, snake beans, pig ear beans (shaped like pig ears). Stems trailing, leaflets lanceolate, flowers white or purple, pods long elliptic, flattened, slightly curved. The seeds are white or purplish black. Like warm and moist, heat-resistant. Usually sow in spring and harvest in autumn. Young pods are common vegetables, and seeds can be used as medicine.

Lentil, legume annual herb with trailing stems, leaflets lanceolate, flowers white or purple, and pods long-elliptic, flattened, slightly curved. Young pods are common vegetables, which can be divided into red flowers and white flowers according to the color of flowers. the colors of pods are green and white, light green, pink and purplish red, with smooth and glossy, hard, thin and crisp seed coat, fishy chewing and full grains. White lentils are mainly used in medicine. Lentil saponins and hemagglutinin can cause food poisoning and must be cooked very well when cooking.

Lentils are rich in nutrients, including protein, fat, sugars, calcium, phosphorus, iron, potassium, food fiber, retinogen and vitamin B1. Vitamin B2. Vitamin C and cyanoglycoside, tyrosinase, etc., lentil coat is particularly rich in B vitamins. In addition, there are phospholipids, sucrose and glucose.

Lentil taste sweet, flat, return, stomach meridian, gas fragrance but not string, mild and yellowish color, most in line with the spleen. It has the effect of invigorating spleen, harmonizing, invigorating qi, resolving dampness and relieving summer heat. The main treatment of spleen deficiency and dampness, eating less loose stool, dampness under the injection, women with too much, summer heat and dampness injury, vomiting, diarrhea and tendon syndrome.

Key points of prevention and control of red spot of lentil

The main symptom of lentil red spot is damage to leaves, and it can also damage pods when the disease is serious. The leaf is sick, the disease spot is round, nearly round or irregular, the size is 4Mel 8mm, red to reddish brown, the edge is dark. When the humidity is high, there is a dense gray mildew layer on the back of the lesion. Pod disease, the disease spot is large, irregular, reddish brown, central brown, late dense gray-black mildew layer. When the disease is serious, the leaves are covered with disease spots, resulting in early withering of the leaves.

The incidence regularity of red spot of lentil

The pathogen overwintered mainly as the mycelium in the soil with the disease residue, or the mycelium in the seed or conidia attached to the seed surface. If you sow the seeds with bacteria, the seedlings can get sick. The overwintering pathogen produced conidia in the next spring and caused the disease by infection. After the onset of the disease, the disease department produces new conidia, which can be spread by wind and rain, and agricultural operations can also spread. The conidia germinate and produce germ tubes, which are invaded by stomata or directly penetrating the epidermis, resulting in re-infection. In the growing season, after many times of conidia re-infection, a large number of pathogens accumulated, once under suitable conditions, the disease will occur seriously. The bacteria like the conditions of high temperature and high humidity, the temperature is 25-28 ℃ and the relative humidity is more than 85%, which is conducive to the occurrence and development of the disease. Heavy rain is conducive to the rapid spread of the disease, especially continuous rain or sunny after rain, the disease is serious.

Key points of prevention and control of red spot of lentil

① agricultural measures: use seeds collected by disease-free plants. The seriously diseased land rotates with non-legume crops for 2-3 years. Planting density should be appropriate to avoid too close planting, in order to facilitate ventilation and light. Strengthen management and timely drainage after rain. The diseased leaves were removed, buried or burned in time. After harvest, thoroughly remove the disabled body and turn it deeply.

② seed disinfection: general seeds should be sterilized. The seeds can be soaked in 45 ℃ warm water for 10 minutes, or mixed with 50% Fumishuang wettable powder of 0.3% seed weight.

③ chemical control: 50% carbendazim wettable powder, 50% methyl topiramate wettable powder and 65% Dysen zinc wettable powder can be used at the initial stage of the disease. Or 70% mancozeb wettable powder 500 times liquid, or 80% Dasheng wettable powder 800 times liquid, or 75% chlorothalonil wettable powder 600 times liquid, or 77% killing wettable particulate powder 600 times liquid, or 50% prohydantoin wettable powder 1000 times liquid 1500 times, once every 7 days or so, continuous prevention and control for 3 times.