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The wide application of plant pesticides will create very favorable conditions for China's agricultural exports, and greatly enhance the competitiveness of China's agricultural exports. The United States recently stipulated that all vegetables and fruits sold in the country must be marked with the content of pesticide residues. Facts have proved that increasingly strict and stringent residue limit standards are becoming a “green barrier†for international food and agricultural products. The export of traditional agricultural products in China is being seriously threatened and challenged. From the perspective of export-oriented foreign exchange products, China's cashew products such as eucalyptus leaves, vegetables, fruits, and tobacco have been reduced or exported because of excessive pesticide residues, which has greatly affected China's economic development. In the case of tea, if plant pesticides are used instead of synthetic chemical pesticides, it can ensure that the tea leaves no pesticide residue pollution. At present, China exports 200,000 tons of tea per year, and exports of 10,000 tons can generate 20 million US dollars. If non-toxic plant pesticides are used, China's exports of vegetables, fruits, tobacco and other agricultural products will increase their competitiveness.
According to experts, because the modern industrial production process of Chinese herbal medicine is not very mature, the raw materials can not be standardized. It is the difference between the same plant variety and the same species due to the difference in origin and ecological geographical position. The chemical substances contained in the roots, stems, leaves, flowers and fruits of the same plant are also very different. To ensure product quality, it is necessary to constantly adjust the proportion of materials according to the quality of raw materials. The composition of Chinese herbal medicine is relatively complicated. The analysis and detection of effective insecticidal is difficult to accurately determine for many plants. In addition to the detection of relevant standards, the quality of the product should be bioassay to ensure the insecticidal effect. Technical problems can be solved by experts' efforts, and new breakthroughs have been made in the development of certain products. However, it is difficult to promote and apply plant pesticides. Some localities and farmers have a weak awareness of environmental protection, lack of necessary knowledge of biological pesticides and plant pesticides, and excessive reliance on the use of chemical pesticides, hindering the commercialization of plant pesticides. Therefore, relevant departments should increase investment and guidance in the development of plant pesticides and technology, so that plant pesticides can be on a healthy track to protect green homes.
Microscope Slides And Cover Slips
1. The glass slide is used to put the sample to be tested, and the cover glass is covered on the sample to be tested.
2. The glass slide is at the bottom, which is the carrier for the material you want to observe, that is, you want to put something on it.
3. The cover glass is smaller than the slide glass. The glass slide is mainly used to hold the observation objects. The cover glass is covered on the slide glass and used for fixing.
4. The glass slide is a thicker piece of glass in the transfer slide, which is used to carry the real object. The cover fragment is the small round or square thin one.
5. Mounting is a general term for a set of things, including slides, coverslips and loaded objects
6. The cover glass is square, the slide glass is rectangular, and the width is longer than the side of the cover glass.
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