In agricultural production, crop pests and diseases are essential, so it is essential to control crops. Before we can prevent and cure diseases, we need to understand the characteristics of the disease and distinguish the diseases, so that we can further the right medicine, so as to achieve twice the result with half the effort. So how do we distinguish disease attributes and how to distinguish diseases? The following small series tells you how to distinguish crop bacterial diseases, fungal diseases, viral diseases and physiological diseases. First of all, we must master the main characteristics of various diseases: Fungal disease 1, will produce different shapes of lesions. 2, the disease will produce different colors of mildew or powder, no odor. Bacterial disease 1. There is no mildew or powder on the leaf, and the lesion is very thin and easy to break or string. 2. Roots and leaves are perishable and smelly. 3, there are sores on the fruit, there are small protrusions on the surface of the fruit. 4, the tip of the root vascular bundle is easy to brown. Viral disease The disease is mainly manifested in the young leaves, although the species is small, but the damage is large and easy to be refractory. 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. Physiological disease It is a non-biological disease and is 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. It can then be classified into three categories according to the type of microorganism causing the disease, namely, higher fungi, lower fungi, and bacteria. The first two are generally caused by over-nutrition in the field. Bacterial diseases are generally caused by lack of nutrients in the field and weak crop growth. Symptoms caused by higher fungi are generally characterized by spots, spots, dry powder, rust, and hairy. These diseases can be controlled by sulfur and Trichoderma. The symptoms of diseases caused by low-grade fungal diseases are generally epidemic diseases and downy mildew diseases, and such diseases can be controlled by Bacillus subtilis. Symptoms of bacterial diseases are thin, transparent, broken, rot, rotten, and stinky. These diseases can be treated with serotonin. Summarize the relevant disease statistics classification as follows: 1, spots, spots, stems: anthrax, black pox, brown spot, target spot disease, ring disease, black spot disease. 2, powder, rust, convex: powdery mildew, rust. 3, hair, mildew, wilting: gray mold, scab, sclerotinia, root rot, blight, blight. 4, frost, epidemics, mites: downy mildew, disease, squatting. 5, thin, transparent, broken type (refers to the symptoms of the diseased part, for example, the diseased parts of the leaves will become thinner and thinner, the sun will have a transparent feeling, the part will rupture later in the onset): angular spot disease, White spot disease, ulcer disease. 6, rot, rotten, odor: soft rot, black rot, bacterial wilt. The above are the characteristics of crop bacterial diseases, fungal diseases, viral diseases and physiological diseases. The characteristics of these diseases allow us to make a simple basis for the identification of crops. The pests and diseases of crops are fundamentally prevention, not treatment. Therefore, while mastering the identification and response schemes of various diseases, we must pay attention to soil improvement and restoration of farmland ecological diversity, and restore the balance of farmland ecosystems. The way. Dental Air Compressor,Air Compressor For Dental Chair,Oil-Free Dental Air Compressor,Dental Chair Air Compressor Foshan Ja Suo Medical Device Co., LTD , https://www.jasuodental.com
