Energy is to provide energy to the natural transformation of the material (mineral energy, nuclear physics energy, atmospheric circulation energy, geographical energy). Energy is the material basis of human activities. In a sense, the development of human society is inseparable from the appearance of high-quality energy and the use of advanced energy technologies. In today's world, energy development, energy and environment are issues of common concern to all people and the world as a whole, as well as an important issue in the social and economic development of our country.
Petroleum products can be divided into: petroleum fuels, petroleum solvents and chemical raw materials, lubricants, paraffin, petroleum bitumen, petroleum coke and other 6 categories. The oil industry has long been dominated by the production of fuel oil for gasoline, kerosene and industrial boilers. From the 1920s to the 1930s more advanced refinery technologies emerged, most notably invented by the French Bedeley (catalytic cracking process). The so-called catalytic cracking is the use of heat, pressure and catalyst to crack the heavy oil into a lighter oil, mainly gasoline. Another refining method is the polymerization method, which is just the opposite of the cracking method: the synthesis of small molecules of macromolecules, the refinement of the lighter gas polymerization into gasoline and other liquids
Lubricant is used in various types of vehicles, machinery and equipment to reduce friction, protection of machinery and processing of liquid or semi-solid lubricants, the main lubrication, auxiliary cooling, rust, cleaning, sealing and bufferingrole(Roab)
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1. Manual removal of larvae: The use of earthworms to colonize the first instar larvae of the yellow caterpillar larvae, artificial removal of the first instar larvae, can reduce the source of insects, play a multiplier effect.
2. Biological control: The natural enemies of the yellow caterpillar are mainly thigh bees, lump wasps, gold wasps, and larvae. In production, care should be taken to protect and use natural enemies, maintain ecosystem balance, and control the occurrence of this pest.
3. Pesticide control: On June 19-21, use 80% dichlorvos EC 1000 times or 2.5% Uranus EC 2500 times.
Timely prevention of yellow caterpillars
The adults of the yellow caterpillar are commonly referred to as "upside-down butterfly". The larvae have food buds and young leaves. They also harm the old leaves, tender bark and flowers and fruit, and only the epidermis and veins remain on the damaged leaves. The first-instar larvae of this worm are clustered. The second instar began to disperse and the food intake increased greatly after the third instar. This worm is one of the most common and serious pests on earthworms. According to the survey, the moths of the second generation of yellow caterpillars on the 3rd of this year showed a peak of moths and hatched on June 12. Since the first generation of the first generation of the yellow larvae of the year occurred positively during the fruit ripening period, most of the fruits could not be controlled by drugs. Therefore, the occurrence of the second generation of larvae was relatively large, but there were differences among the fields. Therefore, all fruit farmers are required to seriously investigate and seize the appropriate period for prevention and treatment. Specific measures include: