How to Care for Grapes in Bags
For netizens, a detailed explanation of how to care for green plants in grape bags, the following editor will answer for you in detail.
How to Care for Grapes in Bags
In the process of grape cultivation management, bagging is essential. Bagging can effectively ensure that grapes have bright colors, avoid fruit rot, sunburn, etc. It has a significant impact on grape quality and can effectively improve market competitiveness. The specific management points before, during, and after bagging grapes are as follows.
Management Before Bagging Grapes
1.整理耳朵 (Tidy the clusters). Generally, after 15-20 days of blooming, the fruit setting of grapes is basically stable, and the thinning of clusters can be carried out at this time. Strong branches usually have 3 clusters, medium branches have 1 cluster, and then the fruit particles are removed. Large cluster grapes should retain 80-100 particles per cluster, medium cluster grapes should retain 50-60 particles per cluster, and small cluster grapes should retain 30-40 particles per cluster.
2. Spraying before bagging. Seven days before bagging, spray 50% carbendazim wettable powder 800-1000 times or 70% thiophanate-methyl wettable powder 800-1000 times to control diseases.
3. Choose a fruit bag. Specialized grape bags are usually made of paper. Paper fruit bags should be strong, not easily damaged, resistant to wind and rain, and have good light and air permeability. Also, choose an appropriate bag according to the grape variety, with green bags for the Guilu series varieties; for red, purple, and black varieties, it is best to choose light-colored or white bags.
Management During Bagging Grapes
1. Timing of bagging. "Bagging should be early but not late." After thinning the entire cluster, the fruit should grow to the size of beans. That is, the bagging process can start 15-20 days after flowering.
2. Bagging technique. Before bagging, place the fruit bags in a damp environment to make the bag opening moist and elastic. When bagging, the force direction should always be upward, gently applying force to avoid touching the young clusters. Then, fold the bag opening and clip it on a stick, tie the bag opening tightly with twine at the fold to prevent insects from crawling in or the bag from being blown over.
Management After Bagging Grapes
1. Check the bags. After bagging grapes, regularly check if the bags are cracked or swollen. If so, replace them in a timely manner. Also, check if there is any bacterial infection in the fruit bags. If so, spray with pesticides before bagging.
2. Pruning grapes in summer. After bagging, tie the vines tightly and pinch them. Leave 10 leaves above the inflorescence of each fruiting branch as the head, remove all side branches above and below the inflorescence, and pinch 2 leaves repeatedly above the cluster. For developing branches, leave 10 leaves and pinch repeatedly, and the operation method for secondary branches is the same as that for fruiting branches.
3. Pest control. Common grape diseases and pests should be controlled in a timely manner. For example, use 50% phoxim 2000 times liquid and 20% sumicidin 2000-3000 times liquid to control pests such as nocturnal moths and longicorn beetles; alternate spraying with 50% thiophanate-methyl wettable powder 1000 times and 50% tuvajun special 700 times can control diseases such as downy mildew, powdery mildew, and (T-J) disease.
4. Time to collect luggage. The main purpose of bagging grapes in the later stage is to make the fruit color better, but green grapes should not be bagged. For red, purple, and black varieties, remove the paper bags 10-15 days before harvest. Also, for bags with good light transmission, they can be removed during the harvest period. The time for clearing bags is usually before 10 am and after 4 pm, and it can be done all day in cloudy weather.
The above are the management points before, during, and after bagging grapes. In order to effectively ensure the quality of grape varieties, we need to clearly understand these matters when bagging. We hope that the content shared by the editor can be helpful to the majority of growers.
The specific introduction of how to care for grapes in bags shared above is hoped to bring some knowledge of flowers to flower enthusiasts.