What is the reason why the leaves of peacock kudzu turn yellow? It may be caused by leaf spot. Let's take a look at the management methods of peacock arrowroot:
Peacock arrowroot is native to America, and likes semi-cloudy, high-temperature and humid environment, and is not cold-resistant. The suitable growth temperature is 20-30℃, and it is not conducive to growth above 35℃ or below 7℃. The wintering temperature should not be low, otherwise the leaves will curl easily. The soil is required to be loose, rich in germ and well drained.
Peacock taro potted plants should choose loose, fertile, well-drained and slightly acidic loam rich in humus. Generally, it can be prepared by mixing 3 parts of humus soil, peat or sawdust 1 part, sand 1 part and adding a small amount of bean cake as base fertilizer. It is forbidden to use cohesive garden soil. When placing the basin, the basin bottom should be padded with 3 cm thick coarse sand as the drainage layer to facilitate drainage.
Sufficient water should be given during the growth period, especially in summer and autumn. In addition to keeping the basin soil moist, the leaves should be often sprayed with water to cool down and moisturize. It requires high air humidity, preferably 70% to 80%; Avoid dry air and dry soil, but don't accumulate water. After the end of autumn, water should be controlled to survive the winter with cold resistance. Keep a dry environment in winter. If it is too wet, the basal leaves will turn yellow and scorch, which will affect their ornamental value.
In the growing season from May to September, it should be placed in a cool or semi-cool place, and the light transmittance should be kept at 40%-60% to avoid direct sunlight. Excessive light or air drying may easily lead to scorching of the tip of the blade and darkening of the leaf spots. However, the light should not be too weak. If it is kept in a dark room for a long time, the temperature is low and the light is insufficient, and it will grow weak, which is not conducive to the formation of leaf color and lose the unique metallic luster of leaf surface. It is acceptable for the sun to shine directly through the glass in winter.
Fertilization is very important.
When the peacock taro lacks fertilizer, the plant is obviously short, the leaf color is dim, and the golden luster is not bright. Applying dilute liquid fertilizer every 20 days during the growth period, and the appropriate ratio of nitrogen, phosphorus and potassium is 2∶ 1∶ 1, which can make the leaves shiny and bright and avoid excessive proportion of nitrogen fertilizer. For example, spraying 0.2% liquid fertilizer directly on leaves every 10 day is very beneficial to germination and growth. Stop rotating fertilizer in winter and summer.
Seasonal alternation attention
Peacock arrowroot likes high temperature and high humidity, and the optimum growth temperature is 18℃-25℃, and it likes air humidity. It grows fastest in May-10 above 20℃. In the low temperature season from 10 to April of the following year, the northern part should be moved into the greenhouse for wintering, otherwise the wintering temperature should not be lower than 15℃. If the indoor temperature difference between day and night is large, you can use a plastic film basin or glass box to keep warm and moist, and wash the leaves with warm water once a month to keep the color of the leaves. Every spring, when the temperature rises to 20℃ steadily, you can change the pot once. When changing pots, new culture soil should be added, residual roots and leaves should be cut off and replanted to facilitate growth.
disease prevention
Peacock taro has few pests and diseases, but if the air is not ventilated and dry, scale insects will also occur, so it is necessary to spray 1500 times dimethoate for control.
Prevention and control of leaf spot of peacock arrowroot
Leaf spot is yellowish brown. At the early stage of the disease, small yellow spots are formed near the edge of the leaves or at the center of the leaves, which gradually expand, deepen in color and turn yellow-brown. There is obvious halo around the spot. With the expansion of the spots, the leaves gradually dried up and shrank, so that they fell off and died. The pathogen is spores of the semi-ignorant fungus dermatophyte. The causes of the disease are high temperature and humidity, poor ventilation, too dense plants, too many weeds and rotten leaves in the cultivation environment, too much nitrogen fertilizer application and long plants. Young organizations are prone to illness.
The control methods are to strengthen the management of fertilizer and water, appropriately increase the application amount of phosphorus and potassium fertilizer, reduce the application amount of nitrogen fertilizer, promote the growth and enrichment of plants and enhance their own resistance. Remove diseased leaves and weeds in time to reduce the source of infection. Plants are not easy to be placed too densely, and proper ventilation and light transmission can reduce the humidity of the environment, thus reducing the incidence. Spray protection when the disease occurs. The medicament is: 50% carbendazim 600-800 times; Or 600-800 times of 75% chlorothalonil; 500 times to 600 times of 50% mancozeb, once every 7 days to 10 day. Various drugs should act alternately to prevent bacteria from developing drug resistance.
How to raise asparagus? What if the leaves of asparagus turn yellow? Asparagus likes moist humus soil, but it should be well drained, out of direct sunlight and cool. Not cold-resistant, pay attention to indoor activities below 0 degrees. I think there are several reasons why your asparagus is yellow: 1, too much sunshine, 2, no change of pots in recent years, and 3, too little or too much watering. Which one? Think for yourself.
The asparagus planted has climbed vines. Why did the leaves turn yellow during this time? What caused it? There are two main reasons for the yellowing of asparagus leaves: one is the low temperature, and the other is that the basin soil is too dry. Asparagus can only grow well at 18-28℃. Asparagus should see more sunshine in winter, and families with conditions can put asparagus on the balcony facing south; Avoid sunlight in summer, and put it in the shade if there is astigmatism. Heating in winter, the home is relatively dry, which is not good for the growth of asparagus. Spray water on asparagus leaves every day to increase humidity. Asparagus should not be watered too dry or too wet, both of which will lead to the yellowing of asparagus leaves. Observe the wet and dry conditions of basin soil. If the pot soil of 1-2cm is dry, it means watering. If asparagus is not flourishing, it should be fertilized. Here's a local method. Watering asparagus with white sugar water can also increase nutrition. Watering asparagus with 5- 10% white sugar water every 20 days can make it flourish.
What is the reason why asparagus turns yellow and leaves dry? What should I do? There are several reasons why asparagus leaves turn yellow:
First, asparagus is placed near heating or air conditioning for a long time, not only the whole feather turns yellow and falls off, but also the stem will dry up.
Second, asparagus will gradually dry up when it is placed next to the TV.
Third, neglect watering, or only watering the surface pot soil, the roots did not absorb enough water, and the stems and leaves slowly turned yellow.
Fourth, excessive watering leads to root rot, and then stems and leaves wither.
5. Fertilizers with improper fertilization, high concentration or immature application are easy to burn seedlings and dry up, and long-term topdressing will also lead to yellowing of fertilizer efficiency.
Six, placed in a sheltered environment for a long time, the plant grows weak and then turns yellow.
Seven, suffering from freezing damage, resulting in yellowing of branches and leaves.
In order to keep asparagus fresh and beautiful, measures were taken to prevent the stems and leaves from turning yellow.
Mainly should pay special attention to the following care:
First, adjust the fertilizer and water. During the growth of asparagus, there is no need to apply fertilizer too frequently. Generally, it is only suitable for topdressing in spring and autumn, and dilute decomposed human manure or low-concentration compound fertilizer solution, or rice washing water and soybean juice water are applied every 18 ~ 15 days. High temperature in summer and low temperature in winter are not suitable for fertilization. Fertilization should be controlled not too much or too late. Water without watering. When it is dry, water it thoroughly at one time, and don't leave waterlogging on the basin surface. Dust on the leaf surface should be sprayed regularly to remove dust.
Second, proper placement. Asparagus likes semi-cloudy, semi-sunny and slightly wet environments.
Third, stay away from heating, air conditioning and TV sets.
Fourth, heat preservation, the lowest room temperature can not be lower than 5℃. If the room temperature is between 0℃ and 4℃, cover it with plastic to keep out the cold.
Fifth, plastic surgery in time. Asparagus tends to clump. In spring, when changing pots and adding soil, prune old and residual fibrous roots and redundant stems and leaves to avoid excessive consumption of nutrients, which plays a role in supporting roots and protecting leaves. Cut off the local yellow leaves; If the stems and leaves are yellow at the same time, they should be cut off together.
What is the reason why the leaves of Milan orchid turn yellow? First of all, see if there is water shortage. If water is scarce, water it. If there is no water shortage, there is little light or lack of fertilizer. You can put it in a better light and then apply some thin fertilizer. It depends on the temperature. If the minimum temperature is below 15 degrees, please do not apply fertilizer. If the temperature is lower than 10 degrees, the leaves will turn yellow, so keep them in a higher temperature place and water them less. I think the lack of light is the main reason, and then the water quality is problematic. Tap water, if poured for a long time, will accumulate a lot of salt in the basin, and the basin will become saline-alkali land. It would be strange if it wasn't yellow. If you pour water from the tap at once, the yellow one will be faster. The water in the water treatment plant contains chloride ion, which is only chloride ion, and most crops are allergic to it.
How to raise asparagus in winter? How to keep its leaves green? (1) Direct sunlight: Asparagus is suitable for growing in a cool and humid environment. If the sun is too direct, the water in the new shoots will evaporate quickly, and the roots will not absorb it in time, which will easily cause the leaves to wither. Asparagus should not be placed in strong light after entering the room.
(2) Improper watering: Asparagus likes to be wet, but it is waterlogged. Pay attention to control the amount of water in autumn and winter, and never water it too much. Otherwise, the pot soil is too wet, which will cause rotten roots and make the leaves turn yellow and fall off; But the pot soil should not be too dry, otherwise, the pot tip will be browned due to lack of water. Water should quickly penetrate into the soil, and do not accumulate water on the soil surface.
(3) Dry air: Asparagus likes humid air. If the room is too dry, the branches and leaves will turn yellow easily. Therefore, it is best to spray and wash branches and leaves with water close to room temperature once a day to increase indoor air humidity.
(4) Dust falling from leaves: Because the branches and leaves of asparagus extend horizontally, it is easy to fall on the dust, which not only affects the growth, but also makes the branches and leaves yellow, so it is necessary to spray clean water frequently to remove dust. Before spraying water, it is best to gently shake the stems and leaves by hand to remove floating dust, and then spray slowly with a fine-hole watering can to gently shake off the water droplets attached to it.
(5) The branches and leaves are too dense: After about two years, asparagus begins to grow a new climbing stem, and it grows naturally by hanging rope or supporting. But if the branches and leaves are too dense, the tip of the leaf will wither easily. Therefore, it is necessary to prune according to the plant type, which has a certain level.
There are other ways to maintain my space.
What is the reason why the leaves of papaya are all yellow? If they are planted in the ground, the roots may rot. (Too wet or too fat) If it is soilless culture, some nutrients may be missing.
What are the reasons why some leaves of asparagus are yellow and some are quite green? If the lower part is yellow and the upper part is green, it is the reason for watering too much. Just stop watering immediately and put it in a well-ventilated place.
growing environment
Asparagus likes warm, humid and semi-cloudy ventilation environment. You can't stand cold and drought in winter, you can't water too much, and your roots will rot. In summer, direct sunlight should be avoided. It is better to use loose, fertile sandy loam with good drainage and rich humus. It is advisable to keep the room temperature at 12- 18℃, and ventilate and dissipate heat when it exceeds 20℃. The suitable growth temperature is 15 ~ 25℃, and the wintering temperature is 5℃. Born in Shan Ye, also cultivated in the garden.
What is the reason why asparagus leaves turn yellow? Usually, it is often watered, and the humidity is high, which is a bit rotten. Asparagus likes scattering light, so it is better to put it in a bright and ventilated place on the balcony. It doesn't matter if the soil is not watered, it can grow under extensive management.