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After the fruit has developed in apple plants for about 20 days after the walnut stage, it is important to consider applying spray to protect the fruit from pests and diseases. This stage of fruit development is crucial for the growth and maturation of the apple, and it is important to take care of the fruit during this time to ensure a healthy, high-quality crop.
One of the most common pests in apple plants during this stage is the apple maggot fly, which can cause significant damage to the fruit. To prevent apple maggot fly infestations, it is recommended to apply a spray containing an insecticide that is specifically labeled for use on apples. This should be done before the apple maggot fly is active, typically around mid-June to early July.
Another common issue during this stage of fruit development is the development of powdery mildew. This fungus can cause a white, powdery coating on the leaves and fruit of apple plants, and can ultimately lead to significant yield loss if left unchecked. To prevent powdery mildew, it is recommended to apply a fungicide spray that is effective against this fungus, before symptoms develop.
In addition to pests and diseases, it is also important to manage weed growth around apple plants during this stage of fruit development. Weeds can compete with apple plants for nutrients and water, and can ultimately reduce fruit quality and yield. It is recommended to apply a herbicide spray to control weed growth around apple plants, taking care to follow the label instructions carefully to prevent damage to the fruit or plant.
Overall, applying spray to apple plants after fruit development is just as important as other stages of growth. By taking care to protect the fruit from pests, diseases, and weeds, it is possible to ensure a healthy, high-quality crop of apples. Always follow the label instructions carefully and consult with a professional if necessary.