Dutch iron disease 1: leaf spot

Morbidity regularity

The pathogen of leaf spot disease usually lives on the remains of the disease through the winter, and can be spread and infected in greenhouses, greenhouses, fields and family potted plants during Rain Water weather and watering splash. the miniature size is that they can invade the plant through wounds or stomata. In the environment of high temperature and humidity, the stomata of plants are enlarged and the disease is more likely to occur.

Symptom

In the early stage of the disease, the pathogen mostly invaded from the leaf edge and leaf tip, and at first it was a small faded green spot like a water stain. If the weather was dry, the disease at the junction of the disease part would be more obvious, showing a sunken dark brown semicircle spot; it was more dangerous in the environment of high temperature and humidity, and the water stain was obvious, and the leaf spot became irregular. With the increase of disease spots, there will be leaf tip drying, whole leaf necrosis, and even bacterial pus can be seen.

Prevention and cure method

1. Eliminate the sick and disabled body in time and burn it centrally.

2, strengthen the light and air permeability, the humidity in the greenhouse should not be too high, watering to avoid splashing, pouring along the edge of the basin is the best, which can reduce the probability of spreading infection.

3. After the disease is found, attention should be paid to spraying at the initial stage. 77% of Kexade wettable powder and water 1Ru 500 solution, 30% copper oxychloride suspension solution, 47% Carinone wettable powder solution, 72% agricultural streptomycin or mycin sulfate soluble powder 4000 times, and so on.

Iron Disease II in the Netherlands: incidence regularity of anthracnose

Germs spend the winter on diseased bodies in a variety of ways. The first infection and re-infection occurred in the second year, during splashing and watering. After the formation of disease spots, continue to form bacteria, continue to re-infection, forming a vicious circle of disease. The disease is more likely to occur in high temperature and rainy season.

Symptom

The disease mainly infects leaf tip and edge, and its symptom is similar to that of leaf spot. Early onset of the disease shows a moist brown spot, sometimes pink mucus. After spread, show semicircular or oval, reddish purple or dark brown disease spot, the center is light brown or gray, after the disease will gradually expand, there will be brown wheel marks around, the disease spot will gradually atrophy and dry. There are black particles on the spot. When the disease is serious, the whole leaf will turn yellow and wither.

Prevention and cure method

1. Timely drainage, prevent moisture retention, apply organic fertilizer, and apply appropriate amount of phosphorus and potash fertilizer.

2. Prune and remove the diseased body in time, bury it deeply or burn it.

3. when the continuous infection of bacteria leads to the disease of Dutch iron, it needs to be sprayed. Spray with stone-sulfur mixture or suspending agent basic cupric sulfate solution (applied before onset), copper noble multiple solution, agricultural anti-water agent solution, Amicida suspension thiobacillus copper multiple solution.

The above is about the Dutch iron and dragon blood tree difference and disease control introduction, want to know more, please pay attention to the four Seasons Plant Network!

A complete Collection of Iron Diseases and their Control in the Netherlands

Dutch Iron Disease I: incidence regularity of Leaf spot

The pathogen of leaf spot disease usually lives on the remains of the disease through the winter, and can be spread and infected in greenhouses, greenhouses, fields and family potted plants during Rain Water weather and watering splash. the miniature size is that they can invade the plant through wounds or stomata. In the environment of high temperature and humidity, the stomata of plants are enlarged and the disease is more likely to occur.

Symptom

In the early stage of the disease, the pathogen mostly invaded from the leaf edge and leaf tip, and at first it was a small faded green spot shaped like a water stain. If the weather was dry, the disease at the junction of the health department would be more obvious, showing sunken black-brown semicircle spots; it was more dangerous in the environment of high temperature and humidity, with obvious water stains and irregular leaf spots. With the increase of disease spots, there will be leaf tip drying, whole leaf necrosis, and even bacterial pus can be seen.

Prevention and cure method

1. Eliminate the sick and disabled body in time and burn it centrally.

2, strengthen the light and air permeability, the humidity in the greenhouse should not be too high, watering to avoid splashing, pouring along the edge of the basin is the best, which can reduce the probability of spreading infection.

3. After the disease is found, attention should be paid to spraying at the initial stage. 77% of Kexade wettable powder and water 1Ru 500 solution, 30% copper oxychloride suspension solution, 47% Carinone wettable powder solution, 72% agricultural streptomycin or mycin sulfate soluble powder 4000 times, and so on.

Dutch iron disease II: the pathogen of anthracnose spends the winter on the remains in a variety of ways. The first infection and re-infection occurred in the second year, during splashing and watering. After the formation of disease spots, continue to form bacteria, continue to re-infection, forming a vicious circle of disease. The disease is more likely to occur in high temperature and rainy season. Symptom

The disease mainly infects leaf tip and edge, and its symptom is similar to that of leaf spot. Early onset of the disease shows a moist brown spot, sometimes pink mucus. After spread, show semicircular or oval, reddish purple or dark brown disease spot, the center is light brown or gray, after the disease will gradually expand, there will be brown wheel marks around, the disease spot will gradually atrophy and dry. There are black particles on the spot. When the disease is serious, the whole leaf will turn yellow and wither.

Prevention and cure method

① timely drainage to prevent moisture retention, application of organic fertilizer, appropriate amount of phosphorus and potassium fertilizer.

② pruned and removed the diseased body in time, buried or burned uniformly.

When the continuous infection of ③ bacteria leads to the disease of Dutch iron, spraying is needed. Spray with stone-sulfur mixture or suspending agent basic cupric sulfate solution (applied before onset), copper noble multiple solution, agricultural anti-water agent solution, Amicida suspension thiobacillus copper multiple solution.