Storage methods of flower seeds, diagnosis and treatment of yellow leaf disease of potted flowers

The yellowing of leaves of potted flowers is not only a variety of reasons, but also a problem often encountered by flower growers. If the management is not found in time, the flowers will die. The main reasons are as follows.

1. Waterlogged leaf yellow: long-term waterlogging in the basin soil makes flowers rot roots, can not normally absorb water and fertilizer, resulting in leaf yellow shedding and withering. The cure is to find yellow leaves and stop watering immediately. Loose basin soil is placed in a ventilated and dry place to speed up the evaporation of water. Watering standard is that the basin soil is dry and wet, once thoroughly watered, do not water sporadically.

2. Lack of water dry yellow: flowers, such as lack of water leaves drooping, should immediately spray water on the leaves to absorb quickly. Then pour water into the basin, pay attention to less watering to make the soil wet, do not water more.

3. Light intensity exposure leaf yellow: summer sun exposure, mosaic yellow macula (sunburn disease), to timely spray water to cool down, increase humidity. Add a sunshade net to make the flowers grow normally.

4, fertilizer burns leaf yellow: apply thick fertilizer too much, flowers can not absorb the root burn, can not absorb water, flowers and leaves yellow withered. Apply thin fertilizer once a week in summer, do not apply more thick fertilizer. If you apply too much fertilizer, you can water more to get rid of the fertilizer.

5. lack of fertilizer leaves thin yellow: lack of fertilizer flowers and leaves are yellow and thin, branches are slender and tender. Fertilizer should be applied immediately and it will be effective within a week. It can be fertilized on time to make the flowers grow normally and bloom more.

6. Alkali soaking leaf yellow: due to the long-term watering of potted flowers, saline alkali is accumulated in the potted soil. In severe cases, there is an alkaline shell on the potted soil, which makes the flowers and leaves fall off. In particular, soil and water in the north contain alkali. The method is to replace the new soil or neutralize the ferrous sulfate solution.

7. Acid-deficient leaf yellow: southern flowers like acidity, and the p11 value 6. O grows normally. If the pH value is more than 7, the veins of the new leaves on the branches will be yellow first, and the edges of the old leaves will wither and wither. Ferrous sulfate should be applied once a month to grow normally.

8. Acid multi-leaf yellow: when applying ferrous sulfate, it should be applied in accordance with the specified proportion, do not apply more. If the foliage is also yellow (does not fall off), you can properly pour some alkali water to adjust it.

9. Large pots and small leaves of yellow flowers: due to large flowers and many roots, need more water and fertilizer, small pots can not meet the needs of flower growth. The old leaves are dry and yellow, while the young leaves are yellow and thin. To change the proper pot, 30% humus should be added to the soil to make the flowers grow normally.

10. The cold wind blows the leaves yellow: because the flowers are blown early by the cold wind in spring or cold in autumn, the flowers suffer frost damage and yellow leaves, so it is necessary to enter the room to moisturize.

11. Disease leaf yellow: flowers in the growth process should always pay attention to the prevention of diseases, timely spraying. Common diseases are "powdery mildew", the back of the leaves are like white powder, which makes the flowers and leaves withered and yellow, the leaves of "brown spot" have black spots on the opposite side, and gray mold, and so on. The main reasons are poor lighting and poor ventilation.

12. Pest leaf yellow: flowers are easy to produce insect pests at high temperature in summer, so we should pay attention to spraying in advance. Generally, there are aphids, whitefly, red spiders, mites and so on. Absorb nutrition and water on the back of the flower leaves to make the leaves withered and yellow. If you kill the pest in time, you can recover. (source: Xingyang Forestry Bureau)