Organic winter jujube is a very common fruit with high nutrition. Organic jujube fruit cracking disease occurs in autumn when the jujube fruit is close to maturity. The jujube fruit is very easy to rot after getting diseased, and the fruit loses its commercial value, which directly affects the economic benefits of jujube farmers. To prevent and control jujube fruit cracking, it is necessary to do it in advance. Let's introduce it below: Organic jujube anti-cracking fruit should be started in advance.
1. Symptoms
When the fruit is almost mature, the surface of the fruit is split longitudinally with a long slit, and the pulp is slightly exposed. Then the cracked fruit rots and becomes sour and cannot be eaten. After the fruit is cracked, it is easy to cause pathogenic bacteria such as anthracnose to invade, thereby accelerating the decay of the fruit.
Second, the law of incidence
Fruit cracking disease is a physiological disease, which generally occurs from the white ripening stage to the coloring stage of jujube fruit. The rainfall during this period will directly affect the degree of cracking of the fruit. If the climate is dry and there is no rainfall one month before harvest, fruit cracking generally does not occur; if the young fruit is dry and less rainy at the early stage of development, after entering the white maturity period or the coloring period, suddenly encounters heavy rain, a large area of fruit cracking and cracks will appear Deeper; if there are several light rains before harvesting, it will also cause fruit cracking, but the cracks are smaller and the rotten fruit is less. Fruit cracking disease is related to insufficient calcium content水果。
3. Prevention measures
1. Reasonable pruning. Properly remove redundant jujube head branches, increase the layer spacing and the opening angle of the main and lateral branches of organic jujube, improve the ventilation and light conditions in the canopy, which is conducive to the rapid drying of the jujube fruit surface after the rain, and can reduce the occurrence of fruit cracking.
2. Timely irrigation. Irrigate the young fruit in time after setting the fruit. The organic jujube can not only promote the normal development of the fruit, but also prevent the phenomenon of fruit cracking due to prolonged drought and rain.
3. Increase the application of organic fertilizers. Adding organic fertilizer to organic jujube can effectively improve the physical and chemical properties of the soil, promote the growth and development of the root system, enhance the absorption of effective minerals in the soil by the root system, and increase the photosynthetic efficiency.
4. Spraying amino acid calcium. From the swelling period of the organic jujube fruit (late July), spray 1000 times the amino acid calcium solution o一旦每15天,喷2 - 3times until harvest, which can significantly reduce the occurrence of fruit cracking.