In the process of vegetable production management, the occurrence of diseases is very common; there are hundreds of diseases in vegetables; but from the original, they can be basically divided into four categories: bacterial diseases, fungal diseases, viral diseases. Physiological diseases. Today, China's pesticide network Xiaobian to focus on how to determine the different diseases of vegetables. Solanum vegetable deficiency syndrome: The crop faucet is curved, and the self-sealing top is easily boron-deficient. Flowering is not strong and boron is also lacking. The new leaves are fresh under the faucet, and the dry side is calcium deficiency. The new leaf under the faucet is yellow leaf for sulfur deficiency. The new leaf under the faucet is white leaf iron deficiency. A brief introduction to the "four major diseases of vegetables" pesticide network is here. To learn more about pesticides, please check the China Pesticide Network in time! Led Downlight Emergency Conversion Kit Led Lamp Emergency Power Supply,Led Battery Ballast ,Led Battery Backup Driver,Led Driver With Battery Backup Foshan Nai An Lighting Electric Co.,ltd , https://www.articalight.com
The pesticide network is a small series to introduce the specific characteristics of different diseases.
I. Bacterial diseases <br> Four special diseases of bacterial diseases Bacterial diseases are diseases caused by bacterial pathogens, such as soft rot, ulcer disease, and bacterial wilt.
1. Roots and leaves are perishable and smelly.
2, there are sores on the fruit, there are small protrusions on the surface of the fruit.
3. There is no mildew or powder on the leaf. The lesions are easy to understand and are very thin and easily broken or stringed.
4, the tip of the root vascular bundle is easy to brown.
Bacterial disease prevention and treatment method
1. Seed treatment. Before sowing, commonly used agricultural streptomycin 300ppm, or 50% dasen ammonium water 800 times liquid soaking seeds to kill the pathogens.
2. Soil disinfection treatment. Before sowing, remove the residual body of the diseased plant in the shed, and then combine the soil preparation, soak 50 kg of quicklime per acre, 50 kg of grass ash, and then sown after two days of soil drying.
3. Do a good job in the management of the shed. The management in the shed is mainly humidity management, reasonable close planting; cultivation with semi-high mulch film; application of no drip film for shed mold; drip irrigation for avoiding irrigation when irrigating; no field farming when the morning dew is large and the field humidity is high in the shed Measures such as operation can effectively prevent the occurrence of bacterial diseases.
4. Reasonable rotation. Carrying out different crop rotations is still an effective method to control bacterial diseases.
5, timely pest control and prevention of human damage to plants, thereby reducing the chance of pathogenic bacteria infection.
6, chemical control. Prevention and treatment of bacterial diseases: generally choose 72% agricultural streptomycin wettable powder, 77% can kill wettable powder, 25% copper hydroperoxide 50% DT fungicide 50% Daisen ammonium water and other chemicals The medicament is used for prevention and treatment.
Second, fungal diseases
Four special diseases of fungal diseases
1. There are mildews or powdery substances on the lesions; different colors, no odor.
2, there are lesions, lesions of different shapes.
Third, viral diseases <br> Viral diseases are few types, harmful, easy to get refractory. The disease is mainly manifested in the young leaves.
1, mosaic virus, leaves shrink, yellow-green phase, golden easy to concave, dark green easy to convex, disease-free leaves flat, leaf eyebrows fan-shaped.
2, 厥 leaf type, the leaves are slender, the veins are rushed, and are linear.
3, rolled leaf type, the blade is twisted and bent to the water.
4, the streak type, on the ripe fruit of the tomato, appear blue-white, gradient rust color, not easy to color, the skin has brown stripes outside the skin. The tip of the capsicum fruit turns yellow upwards, and short brown stripes appear in the yellowed area.
4. Physiological diseases <br> Physiological diseases: Non-biological diseases, not contagious. Generally, it is lower than 20 °C in the morning, and the flowering result can not be normally pollinated, and it is easy to produce empty fruit, deformed fruit, and falling flowers and fruit. From 3 pm to midnight, the temperature is lower than 16 °C, and the nutrients are not easy to be converted and accumulate on the leaves and flower buds, causing the leaves to be thick and thick, and the green leaves are easy to turn into fruits, forming flower topping, melon topping and self-sealing. In the middle of the night, the temperature is lower than 10 °C, which is easy to be blocked at low temperature, and the leaves are easy to age and dry.
Common physiological diseases
The lower leaves are all yellowed, which is magnesium deficiency. The lower veins are green, the leaves are drooping, and the mesophyll has macular manganese. The lower mesophyll turns yellow and the veins are green. This is zinc deficiency. The lower leaves are all green and the yellow sides are deficient in potassium.