The end of April is a decisive stage for those who are waiting for strong apples and pears. Treatment on these days prevents wintering pests from accessing the swollen buds and forms protection against scab and moniliosis. If you want the ovary not to fall off in June, and the branches to bend under the weight of the harvest, it’s time to choose the right care.
What you will need:
- Copper sulfate or Bordeaux mixture to prevent fungal infections and protect the bark.
- Urea (carbamide) for nitrogen replenishment and burning out waking insects.
- Garden varnish or bioprotective composition based on Bacillus subtilis for healing wounds and strengthening the immunity of trees.
How to process:
- Carry out the first treatment in the last days of April, when the air is steadily warming up to +5°C, and the buds have not yet opened.
- Clear the trunks of old bark, remove dry branches, spray the crown with a solution of copper sulfate according to the instructions, especially carefully working on the forks and lower tiers.
- After 5–7 days, apply foliar fertilizing with urea: 30 g per 10 liters of water. The solution will repel aphids and mites, and also provide the trees with available nitrogen for active foliage growth.
- Cover all fresh cuts, cracks and frost holes on the trunks with garden varnish or bio-composition. This will close the gates to infections, improve sap flow and reduce the risk of cracking of the bark due to temperature changes.
After just 7–10 days, the foliage will open smooth and without spots, and the trees will enter the active growth phase. By June, the ovary will be firmly established, and by the end of summer the fruits will be juicy, dense and sweet, without bitterness or damage.
Question and answer:
Optimal temperature for processing apple trees at the end of April?
Spraying is carried out on a windless day at temperatures from +5 to +15 degrees. In hot weather, the solution quickly evaporates and can burn young buds; in cold weather, the product does not have time to act.
Is it possible to mix copper sulfate with urea?
The components are added separately with an interval of 5–7 days. Copper works as a fungicide, and nitrogen from urea stimulates growth. When mixed at the same time, the effectiveness of both products decreases.
