Wheat scab prevention Wheat scab is usually caused by heavy rainfall and bacterial infection of plants. It is necessary to spray carbendazim and thiophanate-methyl bactericidal agents in a timely manner. Wheat scab can also be treated with cyanide, copper spray, etc. Chemical control should be sprayed once every 5 to 7 days, and 3 to 4 times of continuous use of the drug can be used. These agents can also be used to prevent diseases. 1, carbendazim If wheat is not treated in time, it will cause the wheat to quickly wither. Generally, the scab is caused by infecting bacteria. What kind of medicine is best for wheat scab? In fact, when wheat suffers from scab It can be sprayed with carbendazim, and the control effect can be seen in three days. 2, thiophanate In fact, wheat can not only spray carbendazim, but also spray thiophanate-methyl. The bactericidal effect of thiophanate-methyl is also very good. When spraying thiophanate-methyl, the first step is to use water. Diluted and sprayed at a ratio of 1:30 to avoid affecting the normal growth of wheat. 3. Cyanolide Wheat scab is usually caused by heavy rainfall. First of all, it is necessary to give it drainage work in time, and then give it a 1:20 diluted cymene. It does not need to be sprayed every day. Spray once every 5 to 7 days, and continue to use cyanolide for 3 to 4 times. 4, more. Copper spray When wheat is most susceptible to scab, it can be sprayed once more every month. Copper spray is also needed. When it is found that there is yellowing wheat, it needs to be treated immediately. This is effective. Prevent wheat scab, if you can also spray more copper spray control. How to deal with high hot winds in wheat The dry heat wind damage to wheat is mainly in the middle and late May, that is, the middle and late stages of wheat grouting, especially for the mid-filling period. The longer the dry hot air lasts, the stronger the strength and the deeper the damage. The hazards of dry hot air are mainly reflected in the following points: (l) High temperature or hot air greatly enhances the transpiration intensity of wheat leaves, and the water supply of roots is in short supply, causing imbalance of water in plants, causing metabolic activities to be blocked, leaf green cords to be destroyed, and leaves to wither and die. (2) Under the influence of dry hot wind, the root activity of wheat is greatly reduced, which affects the absorption of water and nutrients by wheat and promotes premature senescence of plants. (3) The high temperature makes the photosynthesis intensity decrease, the dry matter accumulation ends prematurely, and the filling period is shortened, resulting in the grain being not full and the 1000-grain weight falling. (4) High temperature enhances the respiration of plants, increases consumption, and inhibits the conversion of monosaccharides into starch, which reduces starch accumulation. (5) The rapid and high temperature of wheat after rain in the late filling stage often leads to the rapid death of wheat plants. In short, the damage caused by dry hot air to wheat is mainly high temperature and drought. The occurrence of strong winds makes this hazard worse. Finally, the 1000-grain weight and bulk density of wheat are reduced, and the yield is reduced by 5%, and the yield is reduced by 10%-20%. How to prevent and mitigate the dangers of dry hot air The degree of hazard of dry hot wind is closely related to the variety of wheat, the planting environment, and the cultivation measures, in addition to the strength of the dry hot wind and the duration of the dry hot wind. In order to reduce the harm of dry hot air to wheat, the following measures can be taken; (l) Select varieties with strong drought resistance and resistance to thousands of hot air. The main anti-dry hot air varieties promoted in various places include Jingdong No. 8, Zhongyou 9507, Jing 9428, and Laoting 639. (2) Improve the soil and enhance the ability of the soil to maintain fertilizer and water. In the later stage, the fertilizer should be suitable, the nitrogen fertilizer should be properly controlled, and the phosphorus and potassium fertilizer should be added. (3) Improve the microclimate of farmland. It is mainly to build farmland shelterbelts and reduce the intensity of dry hot winds. The appearance of dry hot air affects the progress of wheat maturity and is very harmful to wheat. Because dry and hot winds last for a long time and are highly destructive, in the middle and late May, it is necessary to prevent dry hot air in advance and avoid the production of wheat. Wheat powdery mildew disease prevention and treatment method Wheat powdery mildew can invade all organs in the upper part of wheat plants, but mainly in leaves. When the disease occurs, the hulls and awns can also be damaged. At the onset of the disease, white mold spots of 1 to 2 mm appear on the leaf surface, and then gradually expand to a near-circular to elliptical white mold spot. There is a layer of white powder on the surface of the mildew, and the powder is immediately scattered by external force or vibration. Mycelium and conidia of the bacterium. In the late stage, the mildew layer turned grayish white to light brown, and the small black spot of the needle size was scattered on the lesion, which is the closed capsule of the pathogen. Control method 1. Spraying method: In early May, it is the period in which the powdery mildew spores have the strongest reproductive ability, so it is easy to occur in large areas. During the filling period, the density of wheat fields is relatively large. Therefore, when wheat powdery mildew occurs, the amount of liquid must be sufficient when the medicine is used. At the very least, the amount of liquid in one mu of land should be 30 kg (two barrels of water) or more. In order to completely control the expansion and spread of powdery mildew. 2, drug selection: triazolone, diniconol and other traditional agents due to the use of longer, powdery mildew pathogens have developed a strong resistance to these Pesticides, therefore, you can choose 50% azoxystrobin suspension 3000 times solution , or 22.5% oxypoxystrobin 2000 times solution, or 40% flusilazole emulsifiable concentrate and other new agents have better control effect on powdery mildew, and the duration of action can reach more than 15 days. It only needs to be sprayed once during the filling period. Good control of the harm of powdery mildew. Wheat leaf blight symptoms and prevention methods Wheat leaf blight mostly begins to occur in the heading stage of wheat, mainly affecting leaves and sheaths. On the initial diseased leaves, oval yellowish to pale green spots grow on the leaves, and then rapidly expand to form irregular yellow-white to yellow-brown spots. Blocks, generally start from the lower leaves and gradually develop upwards. In late autumn and early spring, the bacteria invade the root canopy of the host, and the lower leaves die, causing the plants to weaken and even die. The lesions in the stem and ear are less obvious and much smaller than the leaf lesions. Conidia are also rare. From the flowering stage to the filling stage of wheat, it is the key period for controlling leaf blight: 1.25% of uridyl alcohol wettable powder 25-30 g or 20% of triadimefon emulsifiable concentrate 100 ml of water is applied uniformly to 50 kg of water; Bacteriostatic wettable powder 1000 times liquid or 50% thiophanate-methyl WP 1000 times solution or 75% chlorothalonil WP 500-600 times solution or 50% carbendazim WP 1500 times solution spray. Depending on the condition of the field, it can be prevented 1-2 times. Wheat stripe rust symptoms and prevention methods Wheat stripe rust is one of wheat rust. Wheat rust is commonly known as "xanthosis", which is divided into three types: rust, stem rust and leaf rust. It is an important disease in China's wheat production with wide distribution, rapid spread and large area. Among them, wheat stripe rust is most common and serious. Mainly in Hebei, Henan, Shaanxi, Shandong, Shanxi, Gansu, Sichuan, Hubei, Yunnan, Qinghai, Xinjiang and other places. The basic measure for controlling wheat stripe rust is to grow disease-resistant varieties according to local conditions. After the wheat is harvested, it will be ploughed and smashed in time to eliminate the self-produced wheat seedlings and reduce the source of the summer bacteria, which can reduce the incidence of wheat. [1] Chemical control China has used bactericides effective against rust, such as dip sodium, rust sodium, fluoroquinone, calcium sulfamate, fluorosilicone, rust, sterilized, and zinc. 1 Seed dressing seed weight 0.03% (active ingredient) triadimefon, that is, 25% triazolone wettable powder 15g mixed wheat 150kg or 12.5% ​​special azole wettable powder 60-80g mixed wheat 50kg. 2 Spring foliar spray wheat from the jointing to the booting stage, the prevalence rate of the disease is 2% to 4%, when the severity reaches 1%, the spraying of 20% triadimefon EC or 12.5% ​​special azole (enzolol, fast Poly) can be started. Wet powder 1000 ~ 2000 times liquid, 25% enemy force (propiconazole) EC 2000 times liquid, to achieve the combination of general rule and treatment. When wheat rust, leaf blight, and sheath blight are mixed, in the early stage of the disease, 667m^2 is treated with 12.5% ​​special azole wettable powder of 20-35g, which is excellent for spraying 50-80L of water, preventing rust and Treating leaf blight and sheath blight. Wheat sucking insect control method The prevention and control of wheat midge is the last pass to control the hazard. Whether it is a poisonous land block or a plot that only controls the adult stage, it is necessary to do a comprehensive prevention and control of the wheat heading stage. It also treats pests such as wheat bran, scab, and powdery mildew. The adult spraying time is two-thirds of the heading of the wheat to the front of the poplar. The time is from April 26 to May 5. The specific prevention and treatment time varies according to the variety, management and environment of the farmers, which requires the farmers to decide according to the development process of the household wheat. Pharmacy and formula: Calculated by 30 kg of water per barrel, Insecticide: 1, pyrethroid plus 50% phoxim 50 ml; 2, chrysanthemum 75 ml plus 80% dichlorvos 15 ml; 3, pyrethroid 50 ml plus 10% imidacloprid 10 g; 4, pyrethroid 50 ml plus 10% nitenpyram 10 ml, or 50% pymetrozine 10 g, or 30% thiamethoxam 3 g; Fungicide: 12.5% ​​diniconazole, or 10% hexaconazole, or 25% tebuconazole 20 ml; foliar fertilizer: potassium dihydrogen phosphate one and a half or urea three or two or other foliar fertilizer. After the above-mentioned pest control agent or formula is mixed, a foliar fertilizer is added. At the same time, prevention and treatment of diseases such as larvae, wheat bran, powdery mildew, scab, rust and leaf blight, reduce and control the effects of dry hot wind. The water consumption per mu is half-uniformly sprayed to prevent the phenomenon that the water consumption is small or the uneven spraying causes the damage of the wheat field. In particular, it is possible to increase the control effect by increasing the amount of water appropriately. In addition, three days after the spray control, the control effect must be checked. If it is necessary to prevent and control, the insect spray should be used for the second spray control. Source of this article: Yue Ge Agricultural Resources Network This article URL: Current wheat scab rust, sucking worm powdery mildew and dry hot wind prevention method Dingmin Pharmaceutical supply Amiodrone API and Amiodrone Intermediates with high purity and best price. The main products CAS No are as follows: 1951-26-4, 52490-15-0. Sample can be sent if you request. 4-Hydroxy-Benzoy1,Arrhythmia Intermediates,Cas 52490-15-0 Shijiazhuang Dingmin pharmaceutical Sciences Co.,Ltd , https://www.dingminpharma.com
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