Phenological characteristics and management points of red bayberry in April

Phenological period: April is the final flowering period of Myrica rubra and the first physiological fruit dropping period and spring shoot growth period of Myrica rubra.

Key nursing care: the key work of bayberry management in April is to protect flowers and fruits in young years, thin flowers and fruits in big years, and strengthen pest control.

Bayberry

Key management points:

1. Big tree high connection: It ends before mid-April.

2. Flower and fruit protection: The middle of April is the peak period of the first physiological fruit drop of Myrica rubra, and the drought intensifies the fruit drop. Therefore, in the first ten days of the year, it is necessary to plan the tree tray 15-20 cm deep; it should be shallow near the trunk and gradually deepen outward. Combined with clearing ditch and covering soil and mowing weeds and firewood on the edge of mountain pits, cover on tree trays to maintain soil fertility and reduce fruit drop. 0.2% potassium dihydrogen phosphate can be sprayed on the leaves of waxberry trees with weak tree vigor and poor fruit bearing. For young trees, trees with strong growth and poor results, 15% paclobutrazol can be sprayed 300 times.

3. Flower thinning and fruit thinning: For bayberry trees with excessive flower quantity, combined with thinning and thinning thin and dense flowering branches, the upper part of the crown of bayberry trees should be thinned more, or spray 100 times solution of bayberry thinning agent "thinning 6" at full bloom. During the period from physiological fruit dropping to rapid expansion, fruit thinning is generally divided into 2-3 times. According to the variety and tree vigor of bayberry, the amount of retained fruit was determined.

4. Prevention and control of diseases and insect pests: The diseases and insect pests in April are mainly the caterpillars of Myrica rubra, the small moth and the dead leaf moth that harm the young shoots. When the larvae are found to be harmful, spray the solution diluted by 1000 times with 48% Lesben EC, or the solution diluted by 1000 times with 40% Bule EC, or the solution diluted by 2000 times with 20% Fenvalerate EC on Myrica rubra trees. Pest on young bayberry trees should be killed manually in time. If the scale insect damage is serious, in late April to use low-toxic pesticide oil emulsion 150 times plus fenvalerate 1000 times spray. In April, we should continue to control bayberry cancer and termites.