Melon melon is a kind of physiological disease. It appears mostly in the ripening period of melon. When the disease occurs, large and deep cracks on the surface of the fruit are difficult to heal, and then the flesh at the crack decays and deteriorates, and it quickly spreads around. Some of the melons that have cracked have completely rotted before they mature. Some of them even mature, their storage time is greatly shortened, their quality is reduced, their production is reduced, and their sales and prices are affected.
Cracking melon cause
1. Melon fruit deficiency before the expansion of fertilizer and water, resulting in slow fruit enlargement, skin aging hardening. The late supply of fertilizer and water is sufficient, and the pulp inside the melon grows and expands rapidly. At this time, the outer skin is already aging. The internal pulp will burst through the aged skin and cause cracks in the melon.
2. After the melon fruit surface is exposed to sunlight, the peel ages and hardens, and the peel shrinks to produce a concentric circular crack on the surface of the melon.
3. The plants are too watered at the later stage of the childbirth, and the water absorption of the plants is large. The flesh of the flesh swells, but the skin is already aged, and the flexibility is poor, thus causing cracking.
4. In the absence of trace elements such as calcium and boron in the soil, it is also easy to form melons.
Control methods
1. Balanced supply of fertilizer. According to the requirement of fertilizer and water requirement during the growth of melon, the fertilizer should be supplied in a balanced manner. Do not apply water by blind irrigation. When fertilizing, it is necessary not only to apply enough basal fertilizer to meet the needs of early growth of melon, but also to timely fertilizer in the late growth stage of melon, to meet the requirements of melon in later growth period. When watering, on the one hand, it is necessary to pour in water in a timely manner to promote the expansion of melon fruit; on the other hand, do not pour any heavy water after swelling melon water, especially try to avoid watering for about 10 days before picking. melon.
2. Protect the blades. Pay attention to protect the leaves near the fruit, use them to block the sunlight for melon fruit, avoid sun cracking caused by skin aging.
3. Spray trace elements. After sitting melon, combined with watering with 0.3% of calcium chloride and 0.12% to 0.25% boric acid solution foliar spray, spray once every 7 days, and even spray 2 or 3 times, to supplement the lack of trace elements.
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