Prevention of mulberry yellowing and chlorosis in summer and autumn

Prevention of mulberry yellowing and chlorosis in summer and autumn

Mulberry chlorosis chlorosis is a physiological disease that lacks trace elements. It often occurs in the silkworm areas in the eastern and western regions in summer and autumn. The disease occurred more severely in the 1990s and has been controlled by comprehensive prevention and control of the disease. However, it has risen in recent years. The disease is distributed in mulberry trees in spots, strips, and clumps. It begins in the shoots of the young leaves, first yellowing between veins, followed by chlorosis of the veins, yellowing of the entire leaf, and severe leaf margin scorch or mesophyll. Necrosis rots and the last leaves fall off. When the temperature is high, the symptoms are relieved or the symptoms are hidden.


(1) Most of the soil in the coastal silkworm area is the coastal light saline soil and desalinated soil. The soil has low iron content and high total salt content, which affects the chlorophyll synthesis and root absorption capacity of the mulberry leaf. (2) In the spring, continuous low temperature, rain and sunshine will affect the photosynthesis and absorption of trace elements in mulberry trees. (3) Partial application of chicken manure, silkworm and other alkaline fertilizers. (4) soil compaction or reversion to alkali. (5) Excessive use of herbicides destroyed the soil structure and decreased the activity of trace elements.


When mulberry trees appear chlorotic chlorotic symptoms, they should attract attention and take comprehensive measures as soon as possible. After 2-3 years of prevention and control, mulberry yellow chlorosis can be effectively controlled. (1) Bury the grass. After the summer cut, dig 50-70 centimeters deep and 30 centimeters wide in the row of mulberry trees, and bury buckwheat, wheat straw, rice straw, etc., and bury 1000 kg per mu. (2) Increase organic fertilizer. Shi Shi amount of gray miscellaneous fertilizer (chicken excrement, silkworm sand can not be applied), biological organic fertilizer, etc., after the summer cut, appropriate spraying of iron-containing foliar fertilizer. (3) In the spring, we will clear the gully, clear the ditch, and reduce the humidity in the field so that the rain will not dry up. (4) Deep dig shallow. In combination with the winter mulberry management to dig deep into the soil, the depth is more than 30 cm, and the soil is frozen in winter; in the spring, it is combined with weeds, and the depth does not exceed 10 cm. (5) Minimize the use of herbicides and use manual weed control as the main method. You can also set up poultry in Mulberry to suppress weed growth.

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