When is the right time to apply antifreeze to cherry trees?
Spraying 150-times-diluted PBO on cherry trees at the large bell stage can improve cold resistance. Spray protective agents at the large flower bud stage; when the expected temperature drop is small and not below -2°C, spray protective agents such as Tianda 2116, fish protein antifreeze, Yunda 120, sodium compound nitrophenolate, fruit tree flower bud antifreeze and other antifreeze agents, which have a certain effect on resisting frost.
Flower and fruit management:
Flower and fruit management is a necessary technique for improving the quality of cherry fruit. But in practice it involves not only the flowering stage and the early fruit-picking stage, but also many aspects such as pruning measures and fertilizer and water regulation.
1. At the early flowering stage and around the full flowering stage of cherries, spray “Yunda - Whole Tree Fruit” at 1500-2000 times dilution 1-2 times, which can fully promote the normal development and elongation of pollen buds and pollen tubes, significantly increase the fruit-setting rate, and at the same time help pollination and fertilization and reduce flower and fruit drop.
2. During the young fruit swelling stage of cherries, spraying “Yunda - Whole Tree Fruit” at 2000 times dilution can reduce detachment at the fruit stalk, prevent the formation of the fruit stalk abscission layer, and reduce the second physiological fruit drop; at the same time it fully promotes synchronous cell division and elongation, making the fruit stalk sturdy and elongated, accelerating uniform fruit growth, and promoting the synthesis and conversion of fruit sugars, which can noticeably raise the selling price.
3. At the early stage of fruit coloring, take measures such as leaf removal and laying reflective film 10-15 days before harvest to promote fruit coloring, and spray calcium salt before harvest (spraying 0.3% calcium chloride solution 3 times in a row, once every week before harvest, can reduce cracking of large cherries and extend shelf life).