Amaranth is a common health vegetable we eat. Many people like to eat leek and scrambled eggs. Many farmers also grow. The regenerative ability of leek is very strong, and it can be harvested many times a year. However, farmers who grow leek know that there are more pests and diseases in leek. So today, Huinong.com will introduce the hazards and control measures of common pests and diseases of leek.

First, leek powdery mildew

1, the main hazard

Leek powdery mildew is a common disease of amaranth, mainly harmful to the leaves. Infected plants, initially with a mildew on the back of the leaves, appearing as a patchy white cream, and after a while the surface loses its green color and becomes a pale yellow plaque. When the disease is serious, the leaf color turns yellow and sags, and finally withers, affecting the photosynthesis of plants.

2, prevention measures

Agricultural control: It is mainly to strengthen field management, timely and efficient removal of weeds and withered leaves, thus reducing pathogens; reducing humidity, releasing wind in time, and improving the disease resistance of amaranth.

Pesticide control: Spray 50% carbendazim WP 600 times solution, or 50% bismuth. Zinc. Fami Double WP 600 times solution, spray 2-3 times at the beginning of the onset of amaranth. Various medicines can be used interchangeably.

Second, leek blight

1, the main hazard

Amaranth blight often occurs in the hot summer season, especially after the heavy rain, the sun is suddenly strong, the light is suddenly strong, the temperature suddenly changes, the middle of the infected plant leaves or the tip of the leaf that touches the ground, there will be obvious water-like symptom. And in severe cases, all the leaves are hot, and if not treated in time, they will all wither. Amaranth wilt is also highly contagious, and the roots after the onset will obviously grow new plants after the disease.

2, prevention measures

Agricultural control: During the period of rooting, it is necessary to control the number and quantity of watering, to avoid seedlings, especially in the rainy season, we must pay attention to the dryness of the soil, timely draining, and use it after the temperature is too high or hot and humid. The well water can be quickly poured to reduce the humidity on the ground.

Pesticide control: Mainly use metalaxyl can be used to display humidity wettable powder 500 times liquid, or 75% chlorothalonil wettable powder 600 times night spray. Spray once every 4-7 days, 2-3 times.

Third, amaranthosis

1, the main hazard

Amaranthosis has a wide range of hazards. It must be noted that in addition to harming amaranth, the leaves, sheaths and pseudo stems of green onions and onions are susceptible to disease. When the leek plant is ill, the affected area will turn brown, eventually leading to root rot and necrosis. In the case of planting too dense, the temperature is about 20 °C, the soil moisture is too large, the ventilation and light is not good, or where there is more water, the disease of amaranth is extremely serious.

2, prevention measures

Agricultural control: mainly for crop rotation. When selecting plots, choose high-yield planting. When fertilizing, the farmyard manure should be fully decomposed. At the same time, fertilizer should be applied and planted properly. Before transplanting, the insecticide should be sprayed once. In particular, it is necessary to strengthen drainage in the rainy season, and after harvesting the leeks, remove the sick body or burn it with fire.

Pesticide control: In the initial stage of amaranth, use 45% chlorothalonil smoke agent per acre, or use 10% procymidone smoke agent, fumigation in the closed shed for about 3-4 hours, in order to better control the disease I recommend using a variety of pharmacy rotations.

Fourth, onion land rope

1, the main hazard

The scallions are also called rootworms, which is a common pest of amaranth. In addition to harming amaranth, it is also very harmful to garlic. Both larvae and adults will harm the amaranth. The larvae will mainly rot the roots of the roots of the amaranth, and eventually the leaves will be yellow, withered, withered, and eventually die.

2, prevention measures

Agricultural control: The main thing is to turn the land to the ground anytime and anywhere. The fertilization should be even, the application should be applied in depth, and the pests should be poured into the roots of the leek to kill all the pests.

Pesticide control: Spray 10% cyanide, marathon emulsifiable concentrate 3000 times, spray once every 5-8 days, 2-3 times.

The above are the hazards and control measures of common pests and diseases of amaranth. Farmers who grow amaranth must pay attention to the prevention of the above pests and diseases. Once they occur, they must be prevented in time. I hope the above can help the farmers who grow the chives.

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