Root rot is one of the most important diseases affecting beans. It occurs in the whole province and is severe in various early stages.
1. Symptoms: The disease is caused by fungi. It can occur from seedling to adult stage, mainly root and stem base. At the time of onset, the leaves gradually turned yellow and withered from bottom to top, but did not fall off; the base of the stem of the diseased plant and the main root became brown, and the cortex rotted. The vascular bundle was browned when the stem was cut, and the whole plant died when severe. If the vegetable plot is low, the soil is bonded, and the base fertilizer is not ripe after many years of heavy weight. In addition to the weather, high temperature and high humidity, the disease is more serious.
2, prevention and treatment: It is best to use seeds with a weight of 0.3% of the seedlings, and combined with 10% Shigao or 50% carbendazim or copper oxychloride to start the roots of the stem.
Powdery mildew is one of the most important diseases of beans, and it is easy to be popular in the middle and late stages of growth.
1. Symptoms: The disease is caused by fungi, which is harmful to leaves, stems and pods. Most of the disease begins from the leaves. At first, white spots appear on the leaves, and then gradually enlarge and form into pieces. In severe cases, the back of the leaves are covered with white powder and the leaves are dry. White spots appear after stems and pods. It is easy to develop under the conditions of high humidity and large temperature difference between day and night. In addition, poor ventilation, insufficient light, excessive watering, and partial application of nitrogen fertilizer are also harmful, and the rainy season is not conducive to the disease.
2, prevention and treatment: the beginning of the disease, 10% Shigao spray once every 10 days, a total of 3 times, can effectively control the occurrence and development of diseases. 0.2% baking soda (100g baking soda plus water 50kg) spray can also be used, which has obvious effect on the control of powdery mildew. A lighter plot can spray 15% of the rust.
Brown spot is one of the common diseases of beans.
1. Symptoms: The lentils are dark brown after the disease, the middle part is grayish brown, and the gray moldy layer is on the wet; the soybean brown spot on the vegetable, the cotyledon lesions are irregular, dark brown, and the tiny black is born. Point, the true leaf spot is brown, the small black spots are scattered on the wheel, and the lesion is limited by the veins and is polygonal. In severe cases, the lesions become large plaques, causing the leaves to turn yellow; the petiole and stems are infected with dark brown strips with unclear lesions. Irregular brown spots on the diseased pods. The disease may cause disease by factors such as high temperature and high humidity, excessive planting density, and heavy cultivation.
2. Prevention and treatment: In addition to taking a series of agricultural and physical measures to prevent the occurrence of diseases, in the early stage of the disease, the fungicide or sulfur suspension agent can be sprayed once every 7 days for 3 times. Or choose Keda, Cobo, etc. or copper noble emulsifiable concentrate.
1. Symptoms: The disease is caused by fungi. It can occur from seedling to adult stage, mainly root and stem base. At the time of onset, the leaves gradually turned yellow and withered from bottom to top, but did not fall off; the base of the stem of the diseased plant and the main root became brown, and the cortex rotted. The vascular bundle was browned when the stem was cut, and the whole plant died when severe. If the vegetable plot is low, the soil is bonded, and the base fertilizer is not ripe after many years of heavy weight. In addition to the weather, high temperature and high humidity, the disease is more serious.
2, prevention and treatment: It is best to use seeds with a weight of 0.3% of the seedlings, and combined with 10% Shigao or 50% carbendazim or copper oxychloride to start the roots of the stem.
Powdery mildew is one of the most important diseases of beans, and it is easy to be popular in the middle and late stages of growth.
1. Symptoms: The disease is caused by fungi, which is harmful to leaves, stems and pods. Most of the disease begins from the leaves. At first, white spots appear on the leaves, and then gradually enlarge and form into pieces. In severe cases, the back of the leaves are covered with white powder and the leaves are dry. White spots appear after stems and pods. It is easy to develop under the conditions of high humidity and large temperature difference between day and night. In addition, poor ventilation, insufficient light, excessive watering, and partial application of nitrogen fertilizer are also harmful, and the rainy season is not conducive to the disease.
2, prevention and treatment: the beginning of the disease, 10% Shigao spray once every 10 days, a total of 3 times, can effectively control the occurrence and development of diseases. 0.2% baking soda (100g baking soda plus water 50kg) spray can also be used, which has obvious effect on the control of powdery mildew. A lighter plot can spray 15% of the rust.
Brown spot is one of the common diseases of beans.
1. Symptoms: The lentils are dark brown after the disease, the middle part is grayish brown, and the gray moldy layer is on the wet; the soybean brown spot on the vegetable, the cotyledon lesions are irregular, dark brown, and the tiny black is born. Point, the true leaf spot is brown, the small black spots are scattered on the wheel, and the lesion is limited by the veins and is polygonal. In severe cases, the lesions become large plaques, causing the leaves to turn yellow; the petiole and stems are infected with dark brown strips with unclear lesions. Irregular brown spots on the diseased pods. The disease may cause disease by factors such as high temperature and high humidity, excessive planting density, and heavy cultivation.
2. Prevention and treatment: In addition to taking a series of agricultural and physical measures to prevent the occurrence of diseases, in the early stage of the disease, the fungicide or sulfur suspension agent can be sprayed once every 7 days for 3 times. Or choose Keda, Cobo, etc. or copper noble emulsifiable concentrate.
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