First, the simple diagnosis of rice "dry heart" 1. "Dead heart" caused by insect pests. The major differences between the damage of rice such as Daxue, Huaihua, Sanhua, and loquat can be caused by "dry heart." The main differences are: (1) Bufo: large wormholes, large intestine excrements, and feces generally lined with rice leaf sheaths and stems. Between stalks. The stems, leaves, sheaths and leaves of the victim rice all turned yellow. The damage is heavier in the rice field and lighter in the middle of the field. (2) Insecticides: After hatching, the young larvae first clustered on the inside of the rice leaf sheath to feed on the food. The damaged leaf sheath first appeared with water-stained macules and then gradually yellowed and died. The young larvae enter the rice stem after being slightly larger, resulting in the yellowing of the tip of the flag leaf of the rice and the death of the heart and leaves in severe cases. There are wormholes on the stalks of indica rice. There are few worms outside the hole and more insects in the hole. (3) Sanhuayu: Cubs feed on the heart of the rice leaf first, resulting in dehydration of the heart and leaves, such as the onion tube and blue and white, commonly known as "false dry heart." Pull out the curled heart leaf. Visible section is neat. If aphids continue to harm, bite off the heart and destroy the growing point, then the heart leaves will completely die, and become a "dry dead heart. The hole of the stem borer of the japonica rice is small, there is no insect feces outside the hole, and white fine-grained insect excrement is inside the hole. (4) Poria: The partial or total occlusion of the rice stalks from the base causes the yellow leaves of the rice leaves to die. The damaged rice is easy to pull up, the stalks have no wormholes, and there is no insect feces. Dry rice fields are prone to occur because of long-term drought and dry rice fields. 2. The "dry heart" caused by the disease. Rice virus disease and bacterial leaf blight can cause rice "dry heart", the difference between the two are: (1) virus disease: dry heart symptoms and the dry heart caused by Saponin, similar, but no wormhole on the rice stem, No insects, the heart blade is not easy to pull up, and the blades are clamped in the glass sheet to squeeze the sterile pus. (2) Bacterial blight: Most of the rice was born during the tillering period. After the onset of disease, the diseased plant leaves or leaves 1-2 leaves under the water loss, curling, blue and dry, necrosis, followed by other leaves gradually curled, blue and dry, and finally the whole plant leaves withered. A small piece of fresh diseased leaf was squeezed and squeezed in a glass slide. Second, the rice "dry heart" prevention measures 1. For the dead heart caused by the locust damage, it can be used to prevent and treat the symptomatic insecticides such as "Ruijinte", "special killing cricket" and "bug cull". 2. The dead heart caused by the damage to earthworms can be baited by baits such as wheat bran mixed with “trichlorfon†when the rice is in the field. 3. For the dead heart caused by virus disease, the rice seed should be soaked with “strong chlorine†before sowing, and the prevention and control of poisonous insects such as rice planthoppers and leafhoppers should be done. 4. For the dead heart caused by bacterial blight, in addition to doing a good job of rice seed disinfection, in the early stages of the bacterial blight, should be timely spraying "Shi Bao Ling", "Ye Kuning" and other symptomatic agents to prevent and cure. Solution Disinfectant,Povidone Iodine Disinfectant,Livestock And Poultry Disinfectant,Animal And Poultry Environmental Disinfectant Shangqiu Meilan Biological Engineering Co.,Ltd , https://www.melanvaccine.com