Wheat choke this way


On March 20-28 this year, the County Plant Protection Station carried out a scouring survey of 1520 plots in 183 villages in 11 townships across the county. The census situation was as follows: The average amount of each species was 3.51, and the highest amount of insects was a single wheat field in Yuanliu Village, Licheng Township, and the number of single insects was 52. It is estimated that an area of ​​227,300 mu has occurred in the whole county, reaching an area of ​​157,800 mu for prevention and control targets, and a net increase of 65,400 mu for the prevention and control targets compared with last year, showing an upward trend. The reason for this is closely related to the incomplete prevention and treatment. Because of the better irrigation conditions and soil conditions in my county, it is beneficial to the occurrence of midge. The wheat midge is sucking wheat juice with larvae, which causes pods to decrease production, generally losing 10-20%, severely reducing production by 40-80%, and even ending up. Because of its small body and hidden dangers, the worms were not easy to find in the early stage and often missed the period of prevention and treatment when they were discovered. Therefore, it requires strong technical control. In mid-April, control of midge insects will be carried out in our country. According to the survey, in recent years, farmers rarely control the midge in the middle of April, but only spray the adult worms after wheat heading, and the use of one-time prevention and control is very common, resulting in incomplete insecticides and wheat in the coming year. Production hidden dangers.
In order to effectively and thoroughly eliminate the wheat midge, it is necessary to control it according to the habit of midge. First of all, the wheat midge only survives for 2 to 3 days from spawning to death and death on the ground. When you find this red bug, other large numbers of adults may have already laid eggs and sprayed Prevention has lost its meaning. Secondly, the wheat midge is a pest that can spread. Although its adult does not fly far, it can fly to the nearby wheat fields with the wind. Inadvertently giving you a surprise, the new land is often a serious hazard. In mid-flood wheat, the midge is located about 3 cm above the surface, and the original overwintering worm is 5-20 cm deep in the ground. The agent is not exposed to the body. The insects rose to the surface during the mid-larvae period, which was most beneficial to the use of drugs. In addition, the midge insects had not emerged during the flood season, and their mobility was poor. The use of the insects before flying out of the red insects was most assured.
The specific prevention and control measures are: two prevention and treatment during the flood season and after the heading, and the main one is the flood season, supplemented by heading prevention and control. Control indicators: On average, more than 2 larvae per sample were used to control the use of pesticides; after heading and pulling the wheat ridges, the adults should be treated with 2--3 tablets. Period of prevention and control: In the middle and late period of April, the adult control is after the heading of wheat.
Control methods:
(1) Toxic soil. The wheat booting period is the midge of the midge. Mu with 2.5% methyl iso-phosphorus granules 1500-2000 grams mixed fine soil 5-10 kg, or mus with 5% Losbian granules 900 grams mixed fine soil 25-30 kg in windless evening, sprinkled in the wheat field The surface, then watering to help seepage, on the one hand to promote the rise of the lower larvae, on the other hand to improve the insecticidal effect.
(2) Adult stage spraying control: It is recommended to use pyrethroids with high-efficiency, low-toxicity, low-residue pesticides. The amount of mu sprayed water should not be less than 30 kg. The severe plots should be sprayed once every 2-3 days and sprayed three times. Before 10 o'clock in the morning and after 4 o'clock in the afternoon, it can be sprayed all day.

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