How to solve the rotten roots of Ligustrum lucidum?
How to solve the rotten roots of Ligustrum lucidum?
The rotten roots of Ligustrum lucidum are generally caused by the following reasons: 1. Too much watering and too much water content in the soil make the roots unable to breathe and die. two。 Excessive fertilization or insufficient fermentation of organic manure will continue to ferment in the soil and generate heat, resulting in root injury and death. 3. There are pests or diseases underground. 4. There are some toxic substances such as industrial waste residue in the underground soil, which cause the root system to rot.
First of all, find out the cause of the death of the root system, pull out the dead plants, improve the soil conditions, and then cut the healthy branches and replant.
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Causes and Countermeasures of Leaf falling during the growing period of Ligustrum lucidum
In 1999, Ligustrum lucidum began to be planted in Hengshui area of Hebei Province, and then the area increased rapidly. But since 2002, the local golden leaf privet has a small number of fallen leaves in the growing season, showing flaky alopecia areata, and continues to spread. By the middle of June 2003, spots appeared in large area of Ligustrum lucidum leaves one after another, the old leaves appeared spots in the young leaves, and then developed to dry up, the leaves fell off, the branches gradually dried up from top to bottom, and a small number of them died. The death part of alopecia areata is mostly in the middle of the planting area.
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Control of Ligustrum lucidum
The damage of Ligustrum lucidum in Beihengshui once occurred, which caused the death of a large area of Ligustrum lucidum at that time. Through the research and control in recent years, good results have been achieved. The control experience is summarized as follows: PseudococcasConstock, also known as mulberry pink scale. Its eggs are generally laid between petioles and branches, oval, light orange, dozens of eggs concentrated into blocks, forming white floc oocysts. Three generations a year. The peak period of the first generation nymph is mid-late May, the second generation is mid-late July, and the third generation is 8.
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