How can you raise rose if you don't know these rose diseases?

This is the 839th day of the Blue Devil's daily original article.

This paper is one of the original theories of the blue demon.

Excerpts from a series of articles on "three-step method of rose culture"

In yesterday's article, the blue demon focused on the prevention and control of black spot and powdery mildew. In addition to the two most common diseases of the rose, there are also some diseases that are easy to infect the rose. Today, the blue demon will list them one by one.

The main results are as follows: 1. Downy mildew of rose usually occurs from April to June, and the cause is mostly too wet.

Downy mildew mainly harms the leaves of rose, and the infected leaves show smear brown spots.

Prevention and control methods: after the rose got downy mildew, the diseased leaves should be removed and destroyed as soon as possible, and fungicides should be sprayed to prevent and cure the disease. In peacetime prevention should pay attention to maintain good ventilation and prevent excessive dampness. 2. Grey mold

Botrytis cinerea often occurs in spring and autumn, where there is a large temperature difference between day and night. Botrytis cinerea mainly harms the leaves and buds of rose. When the leaves are infected with Botrytis cinerea, water-stained brown spots appear at the tip and edge of the leaves at first, smooth and slightly sunken, and then expand and rot. After the bud is infected with Botrytis cinerea, red spots will appear on the petals.

Prevention and treatment: Botrytis cinerea is mainly prevented, and carbendazim and Zinc Deisen can be used for prevention. After the onset of the disease, the infected buds and leaves should be removed in time, and treated with Sukeling, doxorubicin and other drugs. 3. Leaf blight

Rose leaf blight mainly occurred on the leaves, which was characterized by small yellow spots at the initial stage of infection, and then rapidly expanded inward into irregular spots. When the damage was serious, the leaf withered up to 2% of the whole leaf until the positive leaf dried up and fell off.

Control methods: leaf blight can be treated with carbendazim, carbendazim and so on. 4. Anthrax

In the early stage of charcoal maggot disease, irregularly shaped light green patches appeared on the leaves, then expanded into yellowish brown and dark purple, and finally became grayish brown, and the edge was darker.

When new shoots and flowers are infected, the disease spot is similar to that on the diseased leaf, but the disease spot on the shoot is slightly sunken. When it is serious, the leaves atrophy and fall off, and the new shoots rot and die.

Prevention and treatment of charcoal maggot disease should pay attention to maintain ventilation, after the onset of the disease should be timely removal of infected leaves, and then with metalaxyl, or Dysen zinc spray treatment.

In the process of rose culture, improper management is easy to get sick, but there are only a few diseases that are easy to get, and the drugs used for prevention and treatment are similar.

In the process of breeding, as long as we pay attention to prevention, we can greatly reduce the occurrence of rose diseases. Of course, in addition to rose diseases, insect pests are also a big trouble. The biggest problem for Yangtai people to raise rose is the red spider.

Tomorrow the blue demon will continue to share about the identification and control of rose pests. Welcome to share with more flower friends to learn. Have you ever encountered the following problems?

I saw a lot of rose culture methods, and I thought it was very useful at that time.

But if I really want to put it into practice, I find that I can't do it at all.

From this point, we can tell you the fragmentary breeding method, although useful, but not suitable for you now. What you need now is a systematic theory of rose farming. To this end, the blue demon's "Rose Xiaobai Fast advance God's Road" system course was thus born. This course can help you take fewer detours and save at least 2 years. Because the blue demon has gone through all these detours. Need to learn the blue demon's "rose rookie fast advance God Road" system course, long press the QR code below, direct order on it.

Welcome to share with more flower friends know that flower friends who need rose seedlings can go to the blue demon flower shop to buy, the rose has been new!