What to Do When Cherry Tree Leaves Curl? Here Are the Solutions
1. Pinching The purpose of pinching: mainly to control excessive growth of branches, increase branching levels and branch quantity, accelerate crown expansion, promote the transformation of branches into fruiting branches, and help achieve earlier fruiting. Timing of pinching: first, early pinching, carried out 10 days after flowering, pinching young tender shoots while leaving about 10 cm. This helps control...
There are many factors that cause leaf curling in cherry trees, especially in hot weather, when plants are very likely to develop curled leaves. If it is only due to hot weather causing a water shortage in the plant, simply watering the plant more or providing appropriate shade can relieve the symptoms. However, it may also be damage from aphids, which tend to gather on the undersides of leaves to pierce and suck sap, causing leaf curling and wrinkling. For aphids, spray 10% imidacloprid at 2000 times dilution, or pyrethroid pesticides for control.In addition, a lack of nutrient elements in cherry trees can also cause leaf curling. With potassium deficiency, leaf margins become scorched, gradually spreading from the lower part of new shoots to the upper part; scorching occurs on the leaves of old trees from midsummer to late summer, and sometimes the leaves appear blue-green, then the leaf margins curl parallel to the midrib, lose green color, and subsequently appear burnt. Solution: during the growing season, spray 0.2%-0.3% monopotassium phosphate, or apply potassium sulfate to the soil. With calcium deficiency, the tips of young leaves at the top curl into a hook shape and after a few days become brownish-yellow and scorched. Solution: calcium preparations such as GA calcium supplement, Meilin high-efficiency calcium, and calcium lactate work well. With molybdenum deficiency, interveinal chlorosis occurs in the leaves, even turning yellow, and spots of varying sizes that are yellow or orange easily appear; the leaves become slender and deformed, the leaf margins curl upward into a cup shape, and eventually the mesophyll falls off and becomes incomplete. Solution: spray the leaves with a 1.2% ammonium molybdate solution.