1. Rational rotation of disease-resistant seed selection for agricultural control: The rotation of sunflower and gramineous crops is generally conducted at intervals of more than five years. Clear the source of field bacteria: in autumn, deep-lying areas eliminate diseased bodies and reduce the initial infestation source. In the early stage of disease, the lower diseased leaves are removed, which has a certain control over the spread of melasma. Appropriately adjust the sowing date: Sunflowers are most susceptible to this disease when they are milk-to-mature, and the climate conditions in July and August each year are suitable for the occurrence of diseases. According to the local climate characteristics and the fertility characteristics of various varieties, the sowing date (late sowing) can be appropriately adjusted so that the susceptibility stage of sunflower can avoid the seasons of rain and rain and achieve the purpose of disease prevention.
2, physical control with 50 ~ 60 °C hot soaking for 20 min for high temperature sterilization, can effectively control the spread of seeds from the sunflower Alternaria.
3. Chemical control Seed treatment can effectively kill the pathogenic bacteria carried on the seeds. It can be used for seed dressing with 0.3% of the seed amount, or with 2.5% fluocinolone seed-coating agent, with 50% thiram or 70% mancozeb WP. Coating (1:50). In the early stages of the onset of the disease, chemical agents are sprayed in a timely manner, using 25% azoxystrobin suspension 1500 times or 70% mancozeb wettable powder 400-600 times or 75% chlorothalonil wettable powder 800 times, 50% Iprodione WP can be 1000 times liquid every 7-10 days, sprayed 2-3 times.
Imported Premium Antistatic Agent
Antistatic agents are additives added to plastics or coated on the surface of molded products to reduce the accumulation of static electricity. Usually according to the use of different methods, antistatic agents can be divided into two types of internal and external coating, plastic is mainly used in the internal antistatic agent. According to the performance of antistatic agents can also be divided into temporary and permanent two categories.
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