What if there are black spots on the green pineapple leaves?

Green pineapple leaves with black spots how to do, I believe that this is a very headache for many friends, about green pineapple leaves with black spots how to do, today the editor will give advice for everyone, let's take a look at green pineapple leaves with black spots how to do!

What if there are black spots on the green pineapple leaves?

1. Green pineapple may have leaf spot disease, in addition, it is also easy to get root rot, prevention and control methods:

① remove the diseased leaves and pay attention to ventilation.

During the onset of ②, 50% carbendazim wettable powder was sprayed and roots could be irrigated.

2. Poor ventilation leads to black spots on green pineapple leaves. The prevention and cure method is to remove diseased leaves and pay attention to ventilation.

3. Because of the low temperature, you should bask in the sun more during the day and take it indoors at night, but don't put it in the bedroom. It will release carbon dioxide at night, which is bad for people's health.

What are the points for attention in maintenance?

1. Illumination: the original growth condition of green pineapple is in the forest sheltered by towering trees, and the positive direction is not strong. However, in the north of autumn and winter, in order to supplement the deficiency of temperature and photosynthesis, its illuminance should be increased. The way is to put the green pineapple in the place with the best indoor light, or move to the sealed balcony to bask in the sun at noon. At the same time, open windows as little as possible when the temperature is low, because the leaves may be frostbitten in a very short period of time.

2. Temperature: in the north, when the room temperature is above 10 ℃, the green pineapple can survive the winter safely, and when the room temperature is above 20 ℃, the green pineapple can grow normally. In general, it is not a big problem for families to reach this temperature, we should pay attention to avoid excessive temperature difference, and at the same time, we should also pay attention to the leaves not close to the heating equipment.

3. Humidity: refers to the water content of the air in the plant growing environment. Under the condition of ensuring normal temperature, increasing humidity is very beneficial to the growth of plants. The following methods can be used to increase the temperature. Keep the plant close to the humidifier, which opens for more than 5 hours a day, and the plant can enjoy the water mist emitted by the humidifier; spray water on the leaves, stems and air roots of the plant with a sprayer adjusted to the fog scale, several times a day; keep the right amount of water in the flowerpot tray and increase the local temperature of the plant through its evaporation Gently wipe the leaves with cold wet towels or toilet paper or apply them lightly for a short time (1m / d for 2 hours); cover the plants with a transparent plastic film to create a small greenhouse effect and replenish the plant's moisture by evaporating moisture in the soil for no more than 2 hours a day. Too long time will affect plant ventilation and photosynthesis.

4. Water: the amount of water in autumn and winter should be strictly controlled according to room temperature. Before heating, the temperature is lower and the soil evaporation of the plant is slower. In order to reduce watering, the amount of water should be controlled between the original 1max, 4ml, 1max and 2. Even after heating, watering should not be too frequent, watering should be less watered into the basin, and should be oozed by brown silk. In addition, water should be sprayed to the aerial root growth of the brown column to reduce the insufficient water absorption of the root caused by rapid evaporation. Winter water to dry after a day of water is better, the water is too cold easy to damage the roots.

5. Fertilizer: in autumn and winter in the north, plants grow slowly or even stop growing, so fertilization should be reduced. Before winter, liquid inorganic fertilizer is mainly poured and sprayed, and the time is about 15 days. After winter, fertilizer is mainly sprayed on the leaf surface, mainly sprayed through the stomata on the leaf surface, and the fertilizer is absorbed through the stomata on the leaf surface, and the fertilizer effect can act directly on the leaf surface. Foliar fertilizer should use special fertilizer, ordinary inorganic fertilizer is not easy to be absorbed by foliar. Peking University Huasheng series and Japanese flowers can be used as foliar fertilizer.

6. Green radish pile: green pineapple does not bear seeds. Buy from the florist or cut some tender shoots from relatives and friends to survive. After the shoot seedlings germinate, green radish stakes can be added. The green radish column can not only support the growth of green pineapple, but also provide the necessary water. Usually used as a green radish pile into the basin, slightly buried some soil, with a stick tower into a triangle to make it fixed, and then buried in the soil, because it is also a long plant, the soil is not easy to too much. Take the sprouted green radish seedlings and insert them into the soil. Generally speaking, the denser the green radish seedlings in the basin are, the better they look. About 5 green radish seedlings should be planted in a pot. Tie the seedlings with thread while fixing them on the brown column, and water the brown column to keep it moist. After a few days, the aerial root of the green apple will take root and grow in the brown column. The time to join the green radish column is better at the turn of spring and summer. The temperature is low in winter and the seedlings are easy to be injured. When adding the column, we should pay attention to grasp the temperature.