Excuse me, what is the disease of this crab claw orchid leaf, and how should it be solved? 40

A common disease of crab claw orchid.

1. Stem rot, symptoms: Crab claw orchid infection stem rot mostly occurs at the base of the stem. In the early stages of the disease, there will be brownish-green macula, and the lesions will be irregular. In the later stage, the lesions will turn black-brown and sunken, and the tissues under the skin will decay and dry, and there will be black granularities.

Prevention and control method: When cultivating, the substrate must be disinfected before use to ensure that there are no germs in it. When managing, we should pay attention to the amount of watering and the number of watering times each time, do not let the environment be too wet, properly control the humidity, and prefer dry to wet.

In addition, at the beginning of the disease, it is necessary to spray zebsen zinc to avoid further infection.

Second, leaf spot.

Symptoms: Leaf spot disease usually starts from the edge of the leaf, and the initial stage is gray spots, slightly sunken downward. After the later expansion, the edges will be dark brown, and the lesions will slowly dry up in the later stage, and gray-black mildew spots will appear.

Prevention and control methods: Once it is found to be infected with leaf spot, it is necessary to remove the diseased leaves in time to reduce the source of infection. In addition, drugs should be used at the early stage of the disease, and the drug can be 800 times the liquid pentachloronitrobenzene fungicide, or directly applied to the leaves.

Precautions] If you want to avoid the infection of crab claw orchid, you must not only disinfect the soil, but also pay attention to the method when managing. It should be placed in a well-ventilated place, especially in the hot summer. Ensure good ventilation, reduce watering, and be sure not to provide a stuffy, humid environment, otherwise it is easy to get infected.

This kind of flower should not be watered, soak in water with soybeans, soak rice, add less vinegar, put it in a container to ferment, and use these water to water it after 2 days, it can be opened twice a year, and it does not fall off leaves.

Crab claw orchid sheds leaves? Do these 3 points well, firm and green, full of flowers.

Spring Recovery: It is best to make it after the temperature rises.

Put it outdoors, and according to the dry and wet conditions of the soil, water flexibly, the potting soil is not dry and not watered, generally can be watered once every 1-2 days;

Summer: Although the temperature is high and the transpiration is large, because the crab claw orchid is dormant in summer, the potting soil should be kept dry, and it is not too late to water it after 1 day of drying;

Autumn: The weather is gradually less rainy, the temperature is suitable, at this time the crab claw orchid grows vigorously, needs more fertilizer water, should see the pot surface dry that is, water thoroughly, it is best to choose fertilizer water, not clear water;

Winter: It is the flowering period and the blooming period, which can keep the potting soil dry and wet, and the dry and wet can be alternated. It is necessary to follow the above cultivation method.

Reasons for the loss of leaves of crab claw orchid:

1. Excessive watering: Crab claw orchid, also known as Christmas cactus, belongs to the cactus family, fleshy root plants, drought and waterlogging tolerance, can not stand the water, usually the soil is kept moist and dry to a good degree, watering is best when the soil is dry and then watered thoroughly. Now in such a cold weather, watering is even less necessary, and it is okay to water once a week or two.

2. The temperature is too low: the temperature of crab claw orchid is 2-25, the temperature is too high in summer, and it is in the dormant period. And now it's winter, and the indoor temperature of the crab claw orchid should not be lower than 15, otherwise it will be cold and frozen, and it is easy to fall off leaves.

If the temperature difference in the maintenance environment is too large, it is also very easy to lose leaves.

3. Excessive fertilization: During the growth of crab claw orchid, we will fertilize it in order to promote the flowering of crab claw orchid, but the fertilization should not be excessive and too concentrated, nor can we use raw fertilizer that is not rotten, otherwise crab claw orchid will burn its roots and cause leaf loss. Fertilizer can be applied before flowering to promote the blooming of flower buds, but less application, no need to fertilize during flowering, easy to drop flowers.

Personally, it is recommended to use the nutrient solution to dilute it directly with water, which is easy to control the concentration, and it is good to use it once every half a month or so.

4. Pest and disease problems: Crab claw orchid is diseased or insect infestation, and if it grows unhealthy, it will have yellow leaves or even leaves, which requires crab owners to use more snacks for small crabs, observe its condition, and use insecticides as soon as possible to save it.

Overwatering is a common cause of leaf loss in crab claw orchids

In fact, when raising crab claw orchid in summer and autumn, everyone should pay attention, because this plant is in a dormant state, if the watering method is improper, or the water in the pot, there will be rot at the base of the crab claw orchid leaves, and then it will be broken directly.

Crab claw orchid leaves are mainly caused by too much watering, soil compaction, too much fertilization, too high temperature, insufficient light, diseases and pests, too much watering needs to reduce or stop watering, soil problems to replace the soil, when the temperature is too high, pay attention to shade and cooling, insufficient light to keep it sufficient, disease and insect pests to prevent and control in time.

Excessive watering is a common cause of the loss of leaves in the crab claw orchid, the crab claw orchid needs a more humid growth environment, but there can be no excessive water accumulation, if the root water will cause the root to rot, affecting the growth of the leaves, so that the leaves dry up and fall off.

Soil slab will make the roots unable to absorb nutrients, and is not conducive to the circulation of water, but also one of the reasons for the accumulation of water in the roots, the leaves lack nutrients and can not grow normally, easy to appear diseased branches and weak leaves, and the leaves are easy to fall off.

When fertilizing, apply too much fertilizer or use raw fertilizer and thick fertilizer is easy to burn the roots of the crab claw orchid, the roots can not work normally, and even the roots are all rotten at serious points, and the plants are dead.

In summer, many people don't know what is the reason for the loss of leaves of crab claw orchid, mainly caused by too high temperature, crab claw orchid is not resistant to high temperature, if the temperature reaches 30 and above, crab claw orchid will grow unwell, if it lasts for a long time, there will be a phenomenon of leaf falling off, summer maintenance crab claw orchid should pay attention to cooling.

Crab claw orchid needs sufficient light to grow, if it is not enough light, it will grow very fragile and very susceptible to disease, but it needs shade in the summer heat to avoid excessive temperature affecting its growth.

Diseased pests and diseases generally do not make the leaves fall directly, but often cause the leaves to yellow, rot, wilt, and in serious cases, the whole plant will die, so if pests and diseases are found, they need to be sprayed in time to kill insects and disinfect, while maintaining a suitable temperature and humidity, and doing a good job of ventilation can effectively prevent pests and diseases.