Lixia is about to arrive soon. This time was originally a crucial period for the cultivation of peppers in the early spring, but many farmers said that the yellow leaves appeared in the peppers. In general, early spring 茬 pepper is mostly a physiological disease, pepper yellow leaves are also caused by the daily management of farmers, and it is easy to cause other diseases, farmers should pay attention. Let's take a look at the reasons and solutions for the yellow leaves of the early spring.
.jpg "Causes and solutions for the yellow leaves of pepper in early spring")
1. Yellow leaves caused by excessive watering
The weather improved and the peppers entered the normal growth stage. Some vegetable farmers in order to promote the tree, too much watering at one time, resulting in lack of oxygen in the soil, capillary root death or injury, resulting in insufficient supply of water and nutrients, causing the top leaves of the pepper to be light yellow wilting, the old leaves dark yellow. In addition, excessive watering leads to insufficient supply of iron and zinc, or lack of iron and zinc in the soil, which may cause yellowing of the top leaves.
Solution: Watering should be carried out according to the demand of different growth stages of pepper and soil moisture. The requirement is to pour small water instead of flooding. After the yellow leaves appear in the watering, the cultivating and raking should be carried out in time to reduce the soil moisture, and the iron and zinc-containing leaf fertilizer should be sprayed in time to solve the problem.
2. Yellow leaves caused by dry soil
Affected by continuous rainy and snowy weather, the early-planted peppers could not be watered in time due to the low temperature in the early stage, which caused the lower old leaves to gradually dry up and yellow.
Solution: After the weather improves, timely watering to ensure the water required for pepper growth, but watering should not be too large, otherwise the capillary root injury will cause yellowing of new leaves.
3. Yellow leaves caused by excessive fertilization
The normal old leaves are thick and lustrous, and the leaves are dark green. After a large amount of fertilization, the back of the leaves shrinks and bulges, the leaves do not stretch, the old leaves gradually fall off, the new leaves are severely curled, and the whole leaves turn yellow. The reason is that the amount of fertilizer applied is too large.
Solution: Watering the diluted fertilizer concentration in time, combined with the application of rooting agent, and spraying the alizarin lactone or Bi-protection, can alleviate the fat damage.
4. Yellow leaves caused by gas damage
Due to the large-scale application of livestock manure or human excrement, especially the manure that has not been fully decomposed, plus excessive fertilization and application of nitrogen fertilizer, nitrogen can release a large amount of ammonia and hydrogen sulfide during the process of conversion to nitrate nitrogen. Gas, due to fat burning roots or poisonous gas poisoning, can make the leaves turn yellow quickly.
Solution: Apply fully decomposed human, livestock, poultry manure, and apply a small amount of fertilizer for a small amount. It should not be used too much at one time; the number and time of ventilation should be increased. In addition, the yellow leaves of pepper may also be caused by phytotoxicity or disease, but for whatever reason, after the yellow leaves are formed, the combination of symptomatic solution and foliar application of alizarin or Bis It has the effect of promoting the rotation of leaves from yellow to green.
5. Yellow leaves caused by plant deficiency
In the absence of trace elements, pepper is mainly iron-deficient, and the leaves will appear yellow. The main part is yellow when the upper part is yellow, and the iron deficiency is less in the lower part. The specific expression is that the new leaves become pale green and yellow except for the veins. The pale green leaves between the veins also grow on the axillary buds.
Solution: When there is iron deficiency in pepper, it is necessary to add trace elements in time. You can spray iron or 0.05%-0.1% ferrous sulfate solution. It is recommended to spray once every 5-7 days and spray 2-3 times.
The above is the reason and solution for the yellow leaf of the early spring, and the small series should remind the farmers that the pepper virus disease will also occur along with the yellow leaves of the pepper. It is necessary to prevent it in time and prevent it from causing unnecessary losses.
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