What are the management precautions after bagging apples?

Apples are grown very widely in China and are one of the most popular fruits. With the development of technology, many fruit growers have found that bagging apples can help them retain moisture and color earlier. So bagging techniques are becoming more and more widespread, but after bagging apples there are still many management techniques. Below is an introduction to what needs attention after bagging.

1. Preventing and controlling brown spot disease

Apple tree bagging is generally done before the rainy and high-temperature season arrives. Once this season comes, it is the peak period for brown spot disease. Do not think that apples will not develop brown spot disease after being bagged. At this time, even more attention should be paid to the harm of brown spot disease. Brown spot disease harms the leaves, causing them to turn yellow and dry up and fall early, greatly hindering the growth and development of apples. Organic fungicides such as difenoconazole can be used for spraying, and spraying should be done at least twice.

2. Preventing pests

Because the bags are not sealed after bagging, some diseases and pests may appear inside the bags, such as red and white spiders and aphids. Among them, red and white spiders are the most harmful, because when high-temperature weather arrives, the reproductive period of red and white spiders shortens and egg production increases. Red and white spiders gnaw on apple leaves. Severe gnawing can prevent the leaves from carrying out photosynthesis and even cause leaf drop, seriously affecting the normal growth of apples. If inspections and prevention are not done carefully in the early stage, it will be very difficult to control an outbreak of pests later.

3. Controlling the growth rate of branches

In high-temperature and rainy weather, apple trees will also grow to a certain extent, especially the terminal shoots. However, the excessively growing terminal branches must be properly pruned, because excessive branch growth not only competes with leaves and fruit for nutrients, but when dense, all fruit tree branches can also cover one another, causing extremely poor orchard ventilation and light penetration, preventing the lower part from getting ventilation and light and affecting apple quality. The branches extending from the terminal shoots should be cut to a height level with the other branches, and the new leaves on newly grown shoots should be removed to promote flower formation.

4. Supplementing phosphorus and potassium fertilizer

Phosphorus and potassium fertilizer is the best fertilizer for promoting apple enlargement. For promoting enlargement, mid-season varieties are around 7.15, and late-season varieties are around the Mid-Autumn Festival. The main purpose is to supplement trace elements for apple trees, promote apple enlargement, and improve yield and quality.

5. Water management

If drought occurs, water should be supplemented in time, because drought reduces the water in the soil, and apple tree roots cannot develop normally and absorb nutrients to pass on to the whole tree. In addition, too much accumulated water in the orchard during heavy rain can also affect the normal growth of roots. The roots cannot carry out respiration, which naturally affects the absorption and transmission of nutrients. It is best to increase the temperature difference between day and night, as this is beneficial for apple coloring.

Alright, the above are the precautions to take after bagging apples. Special attention should be paid to water and pests. Many people think bagging is meant to prevent diseases, but that is not actually the case. Bagging apples is to protect the fruit surface and promote coloring. Therefore, after bagging, close attention should still be paid to the condition of the apple trees, and any abnormal conditions should be dealt with immediately.