Answer: During the senescence period, the growth of each extended branch of the apricot tree becomes weaker, the new shoots become shorter, the backbone branches begin to sag, the inside of the crown begins to be bare, and the yield and quality decrease. Pruning is mainly to update the backbone branches and branch groups, enhance and restore tree vigor, and extend the economic fruitful years. It is necessary to change the head on the back of the middle and lower angles and grow vigorously, or to retract in the more upright branches to promote the germination and regeneration of the hidden buds. Properly located long branches and upright branches should be cultivated as backbone branches and fruiting branch groups, which can be cultivated by pull branches, short cuts, and toppings in summer. For the fruiting branch group and fruiting branch, in accordance with the principle of removing the weak and retaining the strong, choose to keep the strong branches and shoots to renew.
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There are mainly the following parts: 1. Sampling swab with disposable sterile plastic rod/rayon head 2. Sterile sampling tube containing 3ml of virus maintenance solution (gentamicin and amphotericin B are selected to better inhibit the fungus in the sample. Avoid the human sensitization reaction that may be caused by penicillin in the traditional sampling solution.) In addition, there are additional parts such as a tongue depressor, a biosafety bag, etc. Intended to use 1. It is used for monitoring and sampling of infectious pathogenic microorganisms by disease control departments and clinical departments. It is suitable for sampling of influenza virus (common influenza, highly pathogenic avian influenza, H1N1 influenza virus, etc.), hand, foot and mouth virus and other types of viruses. It is also used for sampling of Mycoplasma, Chlamydia, Ureaplasma, etc. 2. It is used to transport nasopharyngeal swab samples or tissue samples from specific parts from the sampling site to the testing laboratory for PCR extraction and testing. 3. It is used to preserve nasopharyngeal swab samples or tissue samples from specific parts for necessary cell culture. The virus sampling tubes are loaded with infectious substances, and some are even highly pathogenic substances. Therefore, the requirements for packaging containers are very strict, and three requirements must be met at the same time: 1. The safety of transportation. Ensure that the sample does not leak during transportation. Sampling tubes that comply with WHO regulations and biosafety regulations. 2. The security of preservation. Ensure that the sample does not leak during storage. Sampling tubes that comply with WHO regulations and biosafety regulations. 3. The validity of the sample. Make sure that the sampling tube itself will not have a toxic effect on the sample.
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