The latest gentleman orchid long spots and yellowing how to do?

The leaves of Cymbidium have leaf spots and yellow leaves, which may be sick, such as leaf spot and leaf yellow disease. under normal circumstances, the leaves of Cymbidium survive on the plant for about three years, and then the old leaves turn yellow, age, age and fall off naturally. this is the natural process of normal growth and metabolism of Cymbidium, and there are no side effects on the plant, but the new leaves, that is, immature leaves, have leaf spots and yellow leaves. May have leaf spot disease, leaf yellow disease, the following will introduce the reasons for the long spots and yellowing of the leaves of Cymbidium and the treatment methods!

Common causes of long spots in Cymbidium

1. It is to apply fertilizer that is not fermented well. Cause germs to multiply in the basin soil.

2. The basin soil has not been changed for a long time, and there are pathogenic bacteria in the old soil.

3. The new soil was not fermented fully and was fermented twice in the basin.

4. the imbalance of nitrogen, phosphorus and potassium in fertilizer, especially due to the direct contact of fertilizer with make-up in the case of low potassium fertilizer or fertilization.

Prevention and treatment of long spots of Cymbidium

According to the specific reasons, the long spots of Cymbidium should be prevented and cured by different methods. The fertilizers used must be fully fermented, the concentration of fertilizer should be small, and nitrogen, phosphorus and potassium should be balanced. Regularly change the fully fermented nutrient soil twice a year in spring and autumn without raw soil. In this way, leaf spots can be prevented.

Common causes of yellowing of Cymbidium

The main results are as follows: 1. The leaves turn yellow locally and the yellow leaves are irregular. The main reasons are that the surface of the leaves is burned by sunlight, the cold wind blows, the bacteria spread locally by slugs, snails and other pests, or the wound expands after trauma.

2. The leaf tip yellowed at first and gradually spread to the false bulb, mainly because the rotten root interrupted the nutrient supply of the leaf, and the yellowing from the leaf tip to the false bulb, or the use of raw soil or poor soil quality could cause this phenomenon.

3. The false bulb first yellowed and gradually spread to the leaf tip, mainly due to insect pests biting the leaves of the pseudobulb and making it gradually expand to the tip or stagnant water at the pseudobulb in summer and bacteria breeding local yellow leaves here.

4. The whole leaf turns yellow at the same time from the bottom to the end, and the reason is complicated, mainly due to improper management, such as poor ventilation in summer, excessive fertilization, root problems and so on.

Prevention and treatment of yellowing of Cymbidium

First of all, to prevent the rotten roots of the plant, so that the leaves can get adequate nutrition, and then to put an end to trauma and prevent the spread of wounds, the amount of fertilizer applied must be well controlled, avoid hypertrophy, do not water the false bulbs in summer, and pay attention to ventilation in summer. cooling and strengthening management to regularly spray carbendazim, chlorothalonil, methyl Tob, agricultural streptomycin and other sterilization drugs for prevention and treatment, that is, the occurrence of these symptoms can be reduced.