In the spring after the temperature rises, the wheat gradually enters the turning green period, and the field diseases and insect pests also enter the multiple period. It is necessary to focus on the prevention and control of wheat sheath blight, powdery mildew, rust, red spider, and wheat aphid.
Rhizoctonia solani occurs in sporadic cases in winter, and there is an obvious infestation peak in the early plot sowing. With the increase of temperature and the increase of field shading, the development of disease will be accelerated. Damage to the transduced tissue resulted in the reduction of 1000-grain weight. Severe diseased plants often lost water and died. The year of spring and rainy weather, wheat blight often occurs. Returning to the green jointing stage is an important period for the prevention and treatment of the disease. Chloramphenicol, hexaconazole, tebuconazole and other drugs can be used to prevent the spraying of the seedlings in the morning when the dew is not dry. Note that the amount of water used per foot is not less than 50 kg. Severe occurrence of sheath blight occurs for a second time in 7 to 10 days.
The typical symptom of powdery mildew is a layer of white powdery mildew on the surface of the diseased part, which mainly damages the leaves, and also seriously damages the leaf sheath, stem and panicle. The spring temperature rises quickly and there is a certain amount of rain often from time to time. When the diseased leaf rate in the field is up to 10%, medication should be promptly controlled, and diclofenol, propiconazole, and mycetobacter can be sprayed.
Rust Although most of the wheat varieties are disease-resistant, they may still cause rust prevalence when the bacteria source is abundant and there is a lot of rain in spring. With more leaf rust, the diseased leaf appeared near-rounded orange-red mites (Sporisorium spp.), with small lesions, irregular scattered leaves, and dark brownish-oval whitefly on the back of the leaves at the late stage (fert spore stack). . When the leaf rust disease rate reaches 5%, it can be sprayed with 20% triadimefon EC or 12.5% ​​diniconazole wettable powder.
The drought-saturated conditions of the spider mites are conducive to the occurrence of red spiders, yellow and white dots appear on the affected wheat leaves, and the plants are short and stunted, and when they die severely, they die. When wheat ridges have a single line of 33 cm and 200 insects, they need to be controlled by drugs. Can choose to use 1.8% avermectin EC, 15% peony EC, 40% omethoate and other drugs spray, irrigated fields can be combined with water in the wheat field to reduce its occurrence.
After the larvae begin to spring, the temperature rises quickly, and when the rainwater is suitable, it will re-emerge. Most of them are concentrated on stems, leaves and ears to harm the harm and excrete honeydew, affecting photosynthesis, causing yellow spots in the victim's place, causing yellowing of the leaves, or even the death of whole plants. One hundred strains with more than 500 fleas should be used for the prevention and treatment of the drug in time, and 50% anti-inflamy WP, 10% imidacloprid wettable powder, 3% acetamiprid EC and 50% floxamidine hydrate dispersible granules can be used. Spray control.
Rhizoctonia solani occurs in sporadic cases in winter, and there is an obvious infestation peak in the early plot sowing. With the increase of temperature and the increase of field shading, the development of disease will be accelerated. Damage to the transduced tissue resulted in the reduction of 1000-grain weight. Severe diseased plants often lost water and died. The year of spring and rainy weather, wheat blight often occurs. Returning to the green jointing stage is an important period for the prevention and treatment of the disease. Chloramphenicol, hexaconazole, tebuconazole and other drugs can be used to prevent the spraying of the seedlings in the morning when the dew is not dry. Note that the amount of water used per foot is not less than 50 kg. Severe occurrence of sheath blight occurs for a second time in 7 to 10 days.
The typical symptom of powdery mildew is a layer of white powdery mildew on the surface of the diseased part, which mainly damages the leaves, and also seriously damages the leaf sheath, stem and panicle. The spring temperature rises quickly and there is a certain amount of rain often from time to time. When the diseased leaf rate in the field is up to 10%, medication should be promptly controlled, and diclofenol, propiconazole, and mycetobacter can be sprayed.
Rust Although most of the wheat varieties are disease-resistant, they may still cause rust prevalence when the bacteria source is abundant and there is a lot of rain in spring. With more leaf rust, the diseased leaf appeared near-rounded orange-red mites (Sporisorium spp.), with small lesions, irregular scattered leaves, and dark brownish-oval whitefly on the back of the leaves at the late stage (fert spore stack). . When the leaf rust disease rate reaches 5%, it can be sprayed with 20% triadimefon EC or 12.5% ​​diniconazole wettable powder.
The drought-saturated conditions of the spider mites are conducive to the occurrence of red spiders, yellow and white dots appear on the affected wheat leaves, and the plants are short and stunted, and when they die severely, they die. When wheat ridges have a single line of 33 cm and 200 insects, they need to be controlled by drugs. Can choose to use 1.8% avermectin EC, 15% peony EC, 40% omethoate and other drugs spray, irrigated fields can be combined with water in the wheat field to reduce its occurrence.
After the larvae begin to spring, the temperature rises quickly, and when the rainwater is suitable, it will re-emerge. Most of them are concentrated on stems, leaves and ears to harm the harm and excrete honeydew, affecting photosynthesis, causing yellow spots in the victim's place, causing yellowing of the leaves, or even the death of whole plants. One hundred strains with more than 500 fleas should be used for the prevention and treatment of the drug in time, and 50% anti-inflamy WP, 10% imidacloprid wettable powder, 3% acetamiprid EC and 50% floxamidine hydrate dispersible granules can be used. Spray control.
The so-called veterinary drugs, referred to as veterinary drugs, refer to drugs that can regulate the function of livestock from the body and prevent and cure livestock and poultry diseases. Natural plants, animals, minerals, and synthetic drugs and immunizations can all be used as veterinary drugs. Feed additives used in animal production are also often included in the category of veterinary medicines
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