MySheen

Prevention and Control of three physiological Diseases of navel Orange

Published: 2024-11-25 Author: mysheen
Last Updated: 2024/11/25, First of all, the varieties (lines) with strong cracking resistance should be selected for fruit cracking disease, generally, the varieties (lines) with oval fruit shape, small navel or closed navel have better cracking resistance, such as Newhall, etc.; secondly, it is necessary to strengthen scientific management and enhance the tree potential. Especially the drought after the plum rain to before the autumn rain

First of all, the varieties (lines) with strong cracking resistance should be selected for fruit cracking disease, generally, the varieties (lines) with oval fruit shape, small navel or closed navel have better cracking resistance, such as Newhall, etc.; secondly, it is necessary to strengthen scientific management and enhance the tree potential. Especially in the dry period from the plum rain to the autumn rain, we should do a good job in water management, so as to irrigate or spray water in time, keep the soil moist and promote the normal growth and development of fruits. Thirdly, foliar potash fertilizer was sprayed continuously for 2 times during the period of rapid expansion of fruit.

Sunburn orchard covering straw is the basis of preventing sunburn; planting forage grass or interplanting green manure in orchard can reduce sunburn; in high temperature season, do not spray pesticides such as oil emulsion and stone sulfur mixture, so as not to aggravate the occurrence of sunburn. In the early stage of sunburn, stick white paper on the sunburn fruit surface, and pull branches and leaves to block the fruit to reduce direct sunlight exposure.

Umbilical yellow disease begins with the cultivation of healthy trees, appropriate application of nitrogen fertilizer to improve tree nutrition level and nitrogen metabolism function; secondly, pull Qiangwang autumn shoots into a drooping or horizontal state before flowering, so that the vast majority of flowers bloom downward, reduce Xiangyang fruit and prevent the occurrence of navel yellow; spray the navel of fruit with 600 times "xanthate" solution from late July to late August to inhibit the occurrence and spread of navel yellow.

 
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