What to Do About Honey Pomelo Root Rot? Cause Analysis and Latest Countermeasures
In the process of growing honey pomelo plants, farmers often encounter the problem of root rot, which seriously affects the yield of honey pomelo and, in severe cases, causes the death of the plants. So what causes honey pomelo root rot? Let us take a look below at the causes of honey pomelo root rot and the countermeasures.
1. Causes of Honey Pomelo Root Rot
1. Improper fertilization
Long-term application of chemical fertilizers during fertilization causes a severe shortage of organic fertilizer in the soil, deprives beneficial microorganisms of their living environment, causes harmful pathogens to run rampant, and the root system is attacked by fungi, resulting in root rot and dead trees. In addition, the lack of organic fertilizer in the soil causes soil compaction and poor permeability, which also affects root growth and causes root rot.
2. Application of undecomposed farmyard manure
Applying large amounts of undecomposed, unfermented farmyard manure directly into the soil means the large amounts of pathogens, pests and salts it carries will cause serious damage to the root system, and in severe cases directly cause root rot and dead plants. In addition, fertilization is mostly done by hole application or trench application, and because the trenches (holes) dug are few and small, root burn and death are also common phenomena.
3. Neglect of soil improvement
When the orchard is not tilled for a long time, and weed control in spring and summer mostly relies on herbicides, this only eliminates the weeds but does not improve the soil's air permeability, leaving the soil in a compacted state for a long time. This causes the fruit tree roots to move toward the soil surface, so they are neither drought-tolerant nor waterlogging-tolerant; after rain, the soil has poor permeability, which causes suffocation and heavy leaf drop.
4. Poor drainage
In long periods of rainy, high-temperature seasons, the fruit trees have already been severely damaged by improper fertilization, and being soaked in water for a long time makes them lose their original absorption function; combined with long-term high-temperature evaporation, this becomes an important cause of leaf drop, fruit drop and death of the fruit trees.
2. Countermeasures
1. Change fertilization awareness
Advocate the application of farmyard manure, especially high-quality bio-organic fertilizer. When nitrogen, phosphorus and potassium fertilizers are insufficient, nitro compound fertilizer can be used as a supplement. Farmyard manure must be fully composted and decomposed before use. In addition, because chicken manure, pig manure and cow manure from farms contain more hormones, caustic soda and salt, they must be mixed with soil when applied, and secondly, they should not be applied continuously in excessive amounts.
2. Improve fertilization methods
When using fermented farmyard manure, it must be broken up finely and spread evenly, then turned into the soil, to prevent concentrated root burn from trench fertilization. When applying bio-organic fertilizer and compound fertilizer, whether digging circular or radial trenches, there must be more radial trenches; secondly, circular trenches must be long; thirdly, the depth must reach 30 cm.
3. Strengthen soil management
For soil management, persist in carrying out a thorough digging of the soil once every autumn. This not only keeps the soil permeability good, but also prevents the root system from being drawn toward the surface layer. In spring and summer, use fewer herbicides; a micro-cultivator can be chosen to loosen the soil and eliminate weeds in time, keeping the surface soil loose and well aerated. When heavy rain occurs, loosen the soil and aerate it in time after the rain to prevent root suffocation and heavy leaf drop.
4. Strengthen drainage
In the orchard, by thoroughly digging the orchard soil, raise the area around the trunk by 15-20 cm to form a ridge-back shape, preventing water accumulation under the trees after heavy rain.
The above is an introduction to the causes of honey pomelo root rot and the countermeasures. We hope it can help you. To learn more related knowledge, please stay tuned to us.