Bagging can also prevent pests and diseases, reduce the number of pesticide use, and reduce pesticide residues in fruits and bird damage during growth. So, when will the grapes be bagged? How to set it? What are the precautions, you can follow the Portuguese sister to learn more. There are still many problems that need to be paid attention to in grape bagging, such as the timing of bagging, the preparation before bagging, and the operation matters during bagging.
Practice has proved that bagging reduced the incidence of grape by 99%, the fruit cracking rate by 70% and the average yield by 20.6%. Therefore, the importance of bagging technology is more obvious. Choice of bags: The choice of bags depends on varieties and climatic conditions in different regions, which varies greatly. If you are Kyoho, you can choose a common fruit bag such as wood pulp paper, because most Kyoho strains don't have high requirements on the light transmittance of fruit bags.
On the contrary, the coloring of Eurasian grapes must use some fruit bags with good light transmittance, otherwise it will directly affect the coloring. In addition, in addition to considering the factors of light transmittance, fruit bags can also be selected according to the color and cultivation methods of grapes. Red, purple and black varieties had better choose light-colored or white fruit bags. The bagging operation is wrong, and the fruit quality will definitely not keep up!
Precautions before taping: thin the fruit before taping, and thin the fruit particles that are too dense, otherwise the fruit particles that are too tight are prone to crack and infection. If the weather is too dry, water the whole garden before thinning the fruit to prevent sunburn. Secondly, be sure to spray the medicine properly before the tape is set to ensure that the grapes are sterile and put them into the bag. It is suggested that imazalil can be used to help keep the surface of fruit smooth. Jianda is effective against botrytis cinerea, including other miscellaneous bacteria and fungi, which can be used as a reference.
What should I pay attention to when operating? Bagging time: The specific bagging time is to start the operation after the fruit is stable, the whole ear is completed and the fruit is thinned. Pay attention to avoid rainy or hot weather when bagging, and don't rush to bag when it clears up after rain; Prevention and treatment of early infectious diseases and sunburn is not conducive to fruit development after bagging. After the fruit adapts to the environmental changes, you can wait 2-3 days before bagging.
The bagging operation is wrong, and the fruit quality will definitely not keep up! How to bag grapes? Operation during bagging: In other gardens, do not rush to bag after spraying bactericide, and then operate after the liquid medicine is slightly dry. Furthermore, it is best to finish bagging before 9/ 10 the next day after sterilization in the afternoon.