After the pear tree enters the fruit-growing period, once the fruit remains too much, or the fertilizer and water are insufficient, the phenomenon of large and small fruits will easily occur. Measures to prevent and overcome years, one is to strengthen the comprehensive management of fertilizer and water, and the other is to adjust by winter shears.

At present, there are mainly two kinds of winter shearing measures that are often used in production to adjust and overcome the size and annual results of pear trees. First, in the new year, by controlling the number of flowers and fruits and leaving enough branches to prepare, you can obtain a large year of high yield, and It can guarantee a good harvest in small years. Second, as many flower buds as possible are kept in small years. At the same time, the number of flower buds should be thinned to control the number of flower buds.

When pruning the pear tree, it is necessary to thin the flower buds and leave more branches. Special attention should be paid to the proper removal of excessive flower buds on the short fruit branch group, and the appropriate branching of the excessive flower amount. For medium and long fruit branches with flower buds, heads and flowers can be used to form flower buds in the next year. For medium and strong vegetative branches that are moderate and strong, they can be slowly released without cutting to make flower buds in young years. Time; the weaker growing branch group can be rejuvenated by cutting weak, dense, and strong, but pruning should be selected to retain the leading shoots with high buds and higher parts; for too many, too dense Auxiliary branches and large fruiting branch groups can also take advantage of the opportunity to spend many years and thinning appropriately.

When pruning young pear trees, it is necessary to leave more flower buds and less preparation branches to ensure the output of young years. For strong and robust annual branches, 1 to 2 full buds can be retained; the latter branches have flowers, and the front branches have no flowers. The branch group can be thinned above the flowering branches. The fruitless branch group without flowers. The branches on the branch group can be cut short and released slowly to reduce the amount of flowers in the second year, so that the big year will not be too large.

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Vtm Sampling Tube With Swab

[Sample requirements]
The collected nasopharyngeal swab samples should be transported at 2°C to 8°C and sent for inspection immediately, and the sample delivery and storage time should not exceed 48 hours.

[Testing method]
1. Before sampling, mark the relevant sample information on the label of the sampling tube.
2. According to different sampling requirements, use a sampling swab to sample in the nasopharynx.
3. The specific sampling methods are as follows:
a) Nasal swab: Gently insert the swab head into the nasal palate, stay for a while and then slowly turn to exit. Wipe the other nostril with another swab, immerse the swab head in the sampling solution, and discard the tail.

b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with a swab, also immerse the swab head in the sampling solution, and discard the tail.

4. Quickly put the swab into the sampling tube.
5. Break the part of the sampling swab higher than the sampling tube, and tighten the tube cover.
6. Freshly collected clinical specimens should be transported to the laboratory within 48 hours at 2°C to 8°C.

[Explanation of test results]
After the sample is collected, the sampling solution turns slightly yellow, which will not affect the nucleic acid test result.

[Limitations of the test method]
1. For samples that are seriously contaminated due to improper storage after collection, the final test results will be affected.
2. If the sample is not stored at the specified temperature, the final test result will be affected.

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