Black rot, as long as you have raised succulent plants, you know that black rot has always been an acute disease. The speed of its occurrence is only a few hours. Otherwise, the leaves of the stem will fall to the ground (as is the case with white peony), and there will be opportunities for leaf cuttings, or the whole plant will die through water, and the opportunity for cuttings will not be given. So as long as the black rot occurs, you should immediately, immediately, and stand up Carve and deal with it. Without hesitation, cut off the head with a knife. This is the experience of treatment. Otherwise, we will say goodbye to succulent plants.
But today, break the rules and say something you don't know, black rot incubation period!
Black rot is a fungal parasitic infection caused by fungi. This kind of fungus belongs to the genus Fusarium. Fusarium is a kind of very strange fungus. Usually, they rot in the soil and live like ordinary bacteria. However, once infected with plants, they immediately become parasitic. Therefore, the general parasitic fungi will die soon after the host dies, only Fusarium will enter the soil and continue to survive.
Most of the time, Fusarium in the soil and meat live together to keep the well water away from the river. The root hairs shed by the metabolism of meat and meat are the delicious food of Fusarium. Like other saprophytic fungi, they let the organic matter rot, and then get nutrition from it.
But don't forget that Fusarium has another ability: parasitism. If there is a wound in the root system of meat, and the self-healing ability is insufficient, Fusarium will enter the meat body, and then infect the vascular bundle of meat (in Chinese, that is, the vessel transporting nutrients in the rhizome) and start their parasitic life.
In fact, infection is not a problem for meat. They all have this powerful self-healing ability, but this is the vascular bundle to infect. This vascular bundle is more like a human blood vessel. When the flesh is transporting water and nutrients to the whole body, Fusarium just invades the catheter, and it will be transported to various parts of the meat along with the water. We can replenish the brain When their meat is shriveled and watered down, it will recover after a few hours, so the Fusarium will arrive at the fleshy body in these hours. Therefore, once the black rot occurs, it can kill the meat in a short time, making people unable to guard against it.
So we know the original culprit's means of committing a crime. As long as there is black rot and it is found in time, the point to deal with it lies in the humidity of the basin soil. If it is found just after pouring water, it should be dug out immediately and seriously beheaded. Otherwise, in the next few hours, Fusarium will follow the water you pour down to the fleshy body. It would be too late! The result is that the whole plant is dead!
At this time, we decisively dig out and behead. What happens to the Fusarium? Of course, the murderer still lives in the vascular bundles of the meat. However, the beheading we have just done has dealt with some Fusarium, and now the water supply is cut off. Fusarium can't let itself go to more fleshy parts because it has no feet and can only stay in place Parasitic reproduction (that is, at this time black rot from acute disease to chronic disease, that is, his incubation period!)
Our meat is not vegetarian, and they have strong immunity. They're resistant to parasitic infections, and they secrete lignin to isolate infected cells. Lignin does not decay and does not provide nutrients for Fusarium. Succulent tissue can be wrapped in lignin and eventually starved to death.
When decapitating meat, sometimes we will find that the cross section of meat stem is not completely clean, sometimes we can see some small brown spots. These brown dots are the traces of lignin. These traces tell us that, not long ago, it was probably a battlefield where meat and Fusarium were fighting to death.
Such a fight is likely to last weeks, months or even years. Sometimes they just surrounded a wave of Fusarium, but they were successfully broken through by another group of Fusarium, so they launched a campaign again in the body. The result of the long-term struggle between meat and Fusarium is not just the small dots in the stem, but more importantly, they will gradually adapt to the coexistence with Fusarium.
For example, meat is very sensitive to infection at the beginning. A little bit of infection on the root tip may cause the whole plant to lose its leaves. But as time goes by, meat and meat get used to this kind of war, and they will no longer deal with it by shedding leaves and preserving their offspring. Instead, they will take a more active approach and try to exterminate the Fusarium in the body.
Meat in this situation is often in a very dangerous situation. Perhaps an improper watering will lead to the spread of infection and irreversible black rot. Maybe they can successfully starve all the Fusarium and recover from infection.
Here comes the conclusion. After understanding the latent process of black rot, we can gain the following experiences:
1. In case of suspected black rot, such as leaves falling off and leaves turning into water without reason, if the basin soil is in a completely dry state, it can be continued to observe. If the soil is wet, it is necessary to dig meat decisively so as to cut off the water conduction from the roots and limit the spread of black rot.
2. After a particularly long period of drying, pay attention to the timing of the first watering. Generally choose continuous sunny weather watering, if the soil permeability is not good, it should first pour a small amount of water to soak the soil, help the meat to recover vitality, and then pour water.
3. The meat that is not sure whether it is black rot or not and is reluctant to cut its head is actually more or less infected, and very few cases are completely uninfected. The way to deal with this kind of situation should be to air the roots for a long time. In the process of drying roots, the infection will not spread rapidly because there is no water transmission in the catheter, which gives meat sufficient time for self-healing. Some of the old piles that I can't bear to cut down will be dried for 2 weeks or even more often when they go wrong. In this time, the self-healing ability of meat is in the ascendant.
4. When the symptoms of black rot have occurred, do not rush to water carbendazim solution to try to cure the black rot. At this time, water absorption can only lead to the rapid spread of infection, there is no other role. Carbendazim root irrigation is generally used to treat fungal infection on the leaf surface, but the cure effect is not good after the occurrence of black rot. At this time, digging meat and beheading are the right measures.
Control of black rot of succulent plants
The most suitable temperature for the disease is 27 ℃ to 32 ℃, and the disease tends to be mild at 20 ℃, and no more disease occurs when the temperature is below 15 ℃. To ensure a good ventilation environment, the soil can only be poured when it is dry, the basin soil should be kept as dry as possible, and the soil mixed with fungicides can also play a certain role in sterilization and prevention. Granular soil with good air permeability shall be used as far as possible when paving.
