Recently, many citrus groves have experienced the situation of rolling leaves. Here, for the sake of simple summary of several reasons for the roll, although it may not be very comprehensive, but can be analyzed from these aspects, looking for reasons.
First, the coiled leaf caused by nematodes
In the second year, the fruit field without fruit was buried with winter fertilizer, water and fertilizer and foliar fertilizer. The same tree is rolled on one side, and the leaves are not rolled on one side; the roots on both sides of the rolled leaf and the non-rolled leaf are all showing serious root-worm; although there is no leaf on the right, it is believed that the nematode is not solved and will soon appear. The situation of rolling leaves.
This orchard is even more obvious. The management of water, fertilizer, pests and diseases in the whole orchard is relatively good. The overall tree potential is also very good, but when you walk into the orchard, you can see a lot of rolled leaves; some are whole leaves; some are While rolling leaves and yellowing, one side is normal; some are also normal. A few whole rolled leaves and some rolled leaves were randomly excavated, and the root nematodes showed very obvious performance, and the typical nematode harmed the root system.
Second, the fruit leaf caused by the de-fertilization
In the fifth year, the fruit trees were hanged, the winter fertilizer was not buried, the trees were weak, the whole garden was severely curled, and some of the leaves were yellow; the root system was dug, the roots grew well, and the soil was not dry; then the orchard was probably not timely after harvesting. Supplementing nutrition, restoring tree potential, resulting in loss of nutrients leading to leaf rolling. It is recommended to use water-soluble fertilizer for about 15 days, and the leaf surface should be supplemented with trace element fertilizer such as boron and zinc.
Third, the roots caused by broken roots
Roots on both sides
Four roots
This time is also the same orchard. The above tree is rooted on both sides, showing that the leaf is not obvious, and the four-direction short root is quite serious. Of course, the whole orchard is also accompanied by a worm, which may be caused by both reasons. There is existence.
Fourth, the leafworm caused by aphids
This kind of curling leaf is very clear to everyone, and it usually appears on the young shoots, which is very easy to distinguish.
Five other reasons
1. Boron deficiency, which causes curling when boron is absent, accompanied by veins protruding;
2, the cold spring, the temperature difference between day and night leads to the rolling leaves; when the spring colds in the past year, the leaf curls caused by the young leaves
3, fertilizer damage, roots and other causes root damage, insufficient nutrient absorption can also lead to citrus leaf problems.
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