Causes of loquat cracking

The fruit cracking of loquat is a reaction caused by the disharmony between the internal growth of fruit and the external environment.

Climatic factors.

In general, if the rainfall is unevenly distributed from February to May every year, the soil moisture changes obviously, and the fruit cracking will be more serious.

It is reported that the five-year-old bell and the liberation bell pipa were born early after a long period of drought in the hard core period, but when the fruit began to turn color, it suddenly rained heavily, resulting in a large number of fruit cracks.

In addition, in Liandu, the maturity of white loquat stems is generally in the middle and late May. In early summer, more or less rain and higher or lower temperature are extremely unfavorable to the growth and maturity of loquat stems, and rain often causes serious fruit cracking.

According to the field investigation, some varieties encounter bad weather according to the traditional cultivation, and the fruit cracking rate is as high as 80% at maturity, which has a great impact on the yield.

Variety, tree age and planting area.

Fruit cracking of loquat stems is related to varieties. Different loquat stems planted in the same orchard have basically the same rootstock, tree age and field management, and the degree of fruit cracking is often quite different, which is closely related to their fruit structure, peel thickness, genetic factors and crack resistance.

Different varieties have different degrees of fruit cracking. Dazhong is the most prone to fruit cracking, followed by Jiefangzhong, Pak Lei and Taicheng No.4, and Dahongpao has almost no fruit cracking.

Fruit cracking of loquat stems is closely related to tree age. Among the varieties with fruit cracking, the varieties with average tree age of 4-6 years have more fruit cracking, and the incidence of fruit cracking decreases year by year with the increase of tree age.

The same variety, planted in mountainous areas is easier to crack than planted in flat land.

3 on-site management.

Proper field management measures, appropriate fertilizer and water, normal growth of trees, reasonable pruning, thinning flowers and fruits, and flower protection and fruit crown protection when there are few flowers, because the fruit protection is moderate, the fruit development is orderly, and the fruit cracking rate is obviously reduced.