Causes and preventive measures of premature senescence of tangerine

Tangerine is a subtropical evergreen fruit variety. A pair of oranges at the head of the bed or in the table room during the Spring Festival means good luck and good luck. And the yield of tangerine is higher, but it is very easy to have premature senility, so what is the cause of premature senility? How to prevent it? Let's get to know it.

1. The seedlings are not qualified.

For the sake of petty gain, many farmers are eager to rush for seedlings of unknown origin, and they do not know whether the seedlings are quarantined, old seedlings, residual seedlings or diseased seedlings, which is the first cause of premature senility.

Preventive measures: in the purchase of seedlings, we should first know the situation of the seedlings, whether they come from the epidemic area, and then choose strong new seedlings. If they are old, weak, sick and disabled vaccines, they can not be needed. For sick seedlings, they can be planted after spraying.

2. Thick tube of urgent seed

Some fruit growers are eager to plant without good planning and reclamation, and do not know much about the soil. some people choose sandy soil with drainage and fertilizer leakage, or over-consolidated soil, which will lead to premature senescence of tangerines in the later stage.

Preventive measures: make preparations before planting, select good planting land, and plant reasonably and densely after soil preparation and fertilization, generally 90-100 plants per mu. If the soil fertility is average, sparse planting can be appropriate to ensure healthy growth.

3. The groundwater level is higher.

For farmers growing in paddy fields, due to poor drainage in some paddy fields, after a few years of planting, the root growth extends to the groundwater, and the roots are rotten due to long-term immersion in the water, resulting in leaf yellowing and premature senescence. However, some farmers think that it is caused by lack of fertilizer, increase the amount of fertilizer and the number of fertilization, the result is in vain.

Preventive measures: it is necessary to have the best water management and grasp the citrus growth characteristics to have different water management with the change of seasons. In orchards with high groundwater level, drainage ditches must be dug in time, and ring ditches should be opened in mountain orchards to avoid mountain flood erosion and cause soil erosion.

4. Drug damage

In order to start weeding, some farmers use a large number of herbicides in adulthood, resulting in drug damage and premature senescence of tangerines.

Preventive measures: apply more organic fertilizer and phosphorus and potassium fertilizer to improve the stress resistance and disease resistance of plants, use herbicides as little as possible, pay attention to dosage and concentration, use biological control methods to control diseases and insect pests and produce green fruits.

The above is the introduction of the causes and preventive measures of premature senescence of tangerine. I hope it can help you. If you want to know more about it, please follow us.