Precautions
The application of plant growth regulators in grape production is the advancement of science and technology, and has attracted more and more attention from researchers and producers, and the varieties put into application are on the rise.
However, this technology is still in the process of continuous in-depth research. Therefore, it must be used with caution and not blindly. Before use, it must be tested and mastered first-hand information. During the use process, it must be used scientifically, reasonably and moderately. Do not abuse it blindly, and increase the frequency and concentration of use at will. Specifically, the following issues should be noted:
1. Fully consider the safety of plant growth regulators on grapes.
When choosing plant growth regulator varieties, be sure to choose plant hormone products that are permitted in the production of pollution-free green food grapes and produced by fermentation process, and do not use plant growth regulators produced by chemical organic synthesis methods. The food safety of grapes poses a threat. Therefore, when purchasing, you must understand clearly before purchasing, and you cannot blindly follow others to buy. At present, in the production of pollution-free green food, regulators such as B9 and ethephon are not allowed to be used. The EU countries also prohibit the use of three plant growth regulators, such as flumetramide, imidazole, and 245-T.
2. When using, be sure to pay attention to the concentration of use and the number of times allowed, as well as the safety interval. Too high concentration, too many times or too short safety interval may pose a threat to the quality and safety of Portuguese.
3. It is necessary to really understand the side effects of using plant growth regulators, and to find out which varieties can be used and which varieties cannot be used.
Plant growth regulators are not available for all varieties. For example, the bulking agent has a certain effect on the European and American hybrids such as Fujiminori, Gaozu, Jinfeng, Jingya and other Eurasian seedless varieties such as seedless white chicken heart, excellent seedless, and ruby seedless, but it has a certain effect on seedless varieties. For some European and Asian varieties, it is better not to use it. Although the grains are slightly enlarged after use, the maturity period is delayed and the sugar content decreases. Victoria, Jingxiu, Yatomi Rosa, Beauty Finger, Italy, Red Earth, Qiuhei, etc.; although Rizamat can increase the size of the fruit, it will affect the coloring, reduce the sugar content, and easily lead to post-harvest fruit drop. . It is not advisable to use bulking agents for these varieties. In addition, the wonderful seedless of the Eurasian species, the Venus seedless of the European and American hybrids, and the Royal Autumn have no obvious effect after use.
4. Most of the bulking agents are broad-spectrum and are suitable for various varieties, but some are specialized and can only be applied to certain varieties.
Another example is the non-nucleating agent. Not all varieties with seeds can be treated with non-nucleating agent, which must be screened in the test. The seedless treatment is relatively stable, the seedless rate is high, and the fruit size reaches or is close to the untreated size, which has a certain use value. If the seedless rate is not obvious or unstable after use, and the fruit size is obviously smaller, there is no use value.
After some varieties are treated with seedless agent, side effects such as cob distortion, corkization, fruit pedicel thickening and hardening, and berry fall off occur, so it is not suitable for seedless treatment. Inflorescence elongating agent, varieties with particularly good fruit setting performance, such as Eurasian Jingxiu, European and American hybrid Jinxingless, etc. can use inflorescence elongating agent, but such as Auguste, Victoria, Beauty Finger, Rizamat , Kyoho should not be used. In addition, it is not suitable to use fruit-preserving agents for varieties with good fruit-setting performance, which will increase the workload of fruit thinning after use; It is suitable for strong and leggy varieties and orchards, but not suitable for moderately growing varieties and grape orchards.
Plant growth regulators are inseparable from the process of grape planting. They play an important role in increasing the yield and improving the quality of grapes. However, which varieties can use plant growth regulators and which varieties cannot use plant growth regulators? It should be determined after testing.
