What if the leaves of chrysanthemums turn yellow and black? the solution of losing leaves of chrysanthemums

Under the influence of Chinese traditional culture, there are many people who love chrysanthemum, which makes chrysanthemum become a common plant, and it is also a very typical plant planted in our country. However, it is not only love, but also breeding techniques and methods to grow chrysanthemum.

What if the chrysanthemum leaves turn yellow and black?

1. Soil alkali: chrysanthemum likes fertile, permeable and acidic soil. The soil with high PH value of 7.5 can easily lead to lower defoliation of chrysanthemum or yellowing of leaves of the whole plant.

Solution: often pour fermented rice washing water or Rain Water.

2. Too much watering: too much watering leads to long-term wet soil water, poor air permeability and even partial fibrous root rot, showing dark yellow and dull chrysanthemum leaves and shrunk new shoots.

Solution: the principle of watering chrysanthemum is that the pot soil is dry, not dry and thoroughly. Summer climate is hot, basin soil is easy to dry, should be fully watered, but can not be watered at noon, fully watered in the morning, dusk basin soil dry can be watered again. Pour water into the side basin after the rain. Prevent soil from splashing on the leaves when watering.

3. Long-term water shortage: chrysanthemum has not been watered or dehydrated for a long time, although the new leaves have normal leaf color, but the lower leaves gradually dry yellow and fall off and age.

Solution: adequate watering is needed during the growth of chrysanthemums, and the basin soil can be watered again after drying, but pay attention to not watering when the sun is strong at noon.

4. Excessive fertilization of chrysanthemum: excessive fertilization of chrysanthemum results in the yellowing of rooting leaves.

Solution: chrysanthemum fertilization to master more thin fertilizer, see the bud can be a little thicker. Topdressing can be done with rotten bean cake, 2 parts of sesame oil dregs and 8 parts of clear water, once every 710 days. After budding, one part of fertilizer plus 3 parts of water and a small amount of potassium dihydrogen phosphate can be used for topdressing. After application, rinse away the fat and liquid on the leaves with clean water in time.

5. Leaf blight disease: leaf blight infection is one of the causes of yellowing and wilting of chrysanthemum leaves, which mainly harms the flowers and leaves of chrysanthemum.

Solution: spray 500 times wettable ammonium or zinc every 15 days.

The solution to the loss of chrysanthemum leaves

1. Rational fertilization

Chrysanthemum is a fertilizer-loving flower, but its growth stage is different, the amount of fertilizer needed is also different. If the fertilizer is not applied properly at different stages, it will also cause the lower leaves of potted chrysanthemum to wither and fall off. The rejuvenation management of potted chrysanthemum planted in spring needs a little more fertilizer, which should be based on nitrogen fertilizer and promote more new branches and leaves; after transplanting on the pot in summer, it is in the stage of controlling seedling, and there is less fertilization or no fertilization at this time; potted chrysanthemum begins to flourish in autumn and needs a large amount of fertilizer. at this time, phosphorus and potash fertilizer should be increased, but fertilization should not be excessive, which will cause the lower leaves to age and fall off.

2. Watering properly

After the Beginning of Autumn, the water requirement of potted chrysanthemum should be gradually increased. But at this time, too much or too little watering will make the lower leaves of the potted chrysanthemum plant withered and yellow and fall off. It is also necessary to pay attention to watering or raining so as not to splash mud on the leaves, and it is best to spread a layer of hay on the basin, so as not to cause yellow leaves and defoliation when watering or heavy rain.

3. prevention and control of diseases and insect pests

Potted chrysanthemum in early autumn is most likely to be infected with diseases and insect pests. The main diseases are black spot damage to the lower foot leaves of the plant, causing foot leaves to fall off; powdery mildew makes the damaged leaves show white powdery disease spots, which can affect the beauty of the leaves and cause the leaves to fall off. For the disease, before the disease occurs, the chrysanthemum should be prevented in advance. 0.1% Bordeaux solution or 50% Dyson zinc 1000 times 1500 times should be sprayed 2 times 3 times a month. Insect pests include aphids, red spiders, green insects, curly worms, etc., which can be sprayed with omethoate or fenitrothion 1000-1500 times liquid plus 0.3-0.4% urea fertilizer, and the effect is good. The diseases and insect pests of potted chrysanthemum should be prevented and treated as early as possible. once the plant is damaged and the leaves fall off, it will cause irreparable loss to the potted chrysanthemum and greatly reduce the ornamental effect.

In addition, the effective way to prevent the lower defoliation and "barefoot pole" of the potted chrysanthemum plant is to fill the culture soil in layers and stages. When the cuttage chrysanthemum seedlings are finally planted in the culture basin, first fill the nutrient soil in the culture basin, follow the chrysanthemum seedlings to root and grow upward, and then fill the soil in stages until the chrysanthemum bud fills the basin soil, leaving only a 2cm nozzle at the mouth of the basin. So that the watering and fertilizing liquid does not flow out. For the last filling, add 1 pear 3 rotten dry dung.

How to fertilize chrysanthemum

When changing pots for chrysanthemums, an appropriate amount of fertilizer should be added to the soil to make the chrysanthemums grow healthier, but it should be noted that the size of the pots should be determined according to the plants, not too big or too small. Flowerpots can be changed into large pots little by little according to the gradual growth of plants.

Chrysanthemums are fat, but if they are not fertilized properly, they will grow in vain. When applying base fertilizer to chrysanthemum, potassium and phosphate fertilizer can be used as the main fertilizer. Fertilization time is not too early, you can choose the Beginning of Autumn to diaphragm to plant flowering, this period of time must ensure that chrysanthemum adequate fertilizer and water. When applying fertilizer, the concentration of fertilizer can be increased gradually.

In the seedling stage of chrysanthemum, the amount of fertilizer needed is relatively small, so it can be fertilized once or two days a week, and fresh water fertilizer should be applied; during its growing period, the seedlings grow slowly, and the fertilizer needed will increase, so that the frequency of fertilization can be increased, about 5 to 7 days, and during the period from July to August, when the temperature is high, it is necessary to appropriately reduce fertilization so that the growing chrysanthemum can safely spend the summer. From September to October, the temperature gradually dropped, which is also the most vigorous period of plant growth, which can increase its concentration while increasing the number of fertilizers.

Grafting method of Chrysanthemum

Splicing method. The selection of scion is the top tip of 5~7cm long chrysanthemum seedling, with two or three leaves at the top, and the larger leaves in the lower half are removed. Then use a double-sided knife to cut the scion into a 1.5cm-long wedge, and then keep it in your mouth to avoid saliva. After that, cut the rootstock from the grafting site by splitting it from the middle of the rootstock with a knife, and the depth is required to be slightly or as long as the scion section (1.5~2cm). Insert the scion into the split, align the cambium of the two, wrap the interface tightly with plastic strips from top to bottom, and apply soil on the cross section to achieve moisturizing effect. Finally, put the prepared plastic bag on it and tie the mouth of the bag. In particular, when setting a plastic bag, you should pay attention to putting the scion together with several artemisia leaves under the interface into the bag.

In the process of cultivating chrysanthemums, there will inevitably be some problems that threaten the growth of chrysanthemums, but the main reason for these problems is that chrysanthemums do not adapt to the environment, so it is necessary for us to adjust the growth environment of chrysanthemums according to the growth habits of chrysanthemums, so as to ensure the normal growth of chrysanthemums.