What are the rose diseases? Only by recognizing these can you grow roses well

This is day 839 of Lanyao's daily original articles

This article is an excerpt from one of Lanyao's original theories

Excerpt from the "Three-Step Rose Growing Method" series

In yesterday's article, Lanyao focused on the prevention and control of black spot disease and powdery mildew. Besides these two most common rose diseases, there are some other diseases that roses are also prone to catching. Today Lanyao will list them one by one.

1. Downy mildewRose downy mildew tends to occur from April to June, and the cause is mostly excessive moisture.

Downy mildew mainly harms the leaves of roses. Infected leaves develop smeared brown spots.

Prevention and control methods:After a rose catches downy mildew, the diseased leaves should be removed and destroyed as early as possible, and at the same time a fungicide should be sprayed for prevention and control. For routine prevention, attention should be paid to maintaining good ventilation and preventing excessive moisture.2. Gray mold

Rose gray mold tends to occur in spring and autumn when the temperature difference between day and night is large. Gray mold mainly harms rose leaves and flower buds. When leaves are infected with gray mold, water-soaked brown spots first appear at the leaf tips and leaf margins, smooth and slightly sunken, then expand and rot. When flower buds are infected with gray mold, red spots appear on the petals.

Prevention and control methods:Gray mold is mainly prevented. For prevention, carbendazim, zineb and the like can be used. After the disease occurs, infected flower buds and leaves should be removed in time, and drugs such as procymidone and dimethirimol can be used for treatment.3. Leaf blight

Rose leaf blight occurs mainly on the leaves. It shows as small yellow spots in the early stage of infection, then rapidly expands inward into irregular large patches. When the damage is severe, the dried area of the leaf can reach 2/3 of the entire leaf, until the whole leaf dries up and falls off.

Prevention and control methods:For leaf blight, carbendazim, kresoxim-methyl and the like can be used for treatment.4. Anthracnose

In the early stage of anthracnose, irregular light green patches appear on the leaves, then expand into yellow-brown and dark purple, and finally turn gray-brown, with the edges being darker in color.

When new shoots and flowers are infected, the lesions are similar to those on diseased leaves, but the lesions on the shoots are slightly sunken. In severe cases, the leaves shrivel and fall off, and the new shoots rot and die.

Prevention and control methods:For anthracnose prevention, attention should be paid to maintaining ventilation. After the disease occurs, infected leaves should be removed in time, and then metalaxyl or zineb should be sprayed for treatment.

During the process of growing roses, improper management makes them prone to disease, but the diseases they are prone to are just these few, and the drugs used for prevention and treatment are all much the same.

During the growing process, as long as attention is paid to prevention, the occurrence of rose diseases can be greatly reduced. Of course, besides rose diseases, pests are also a big trouble. The biggest problem for balcony growers raising roses is spider mites.

Tomorrow Lanyao will continue to share about the identification and control of rose pests. You are welcome to share it with more flower lovers so they can learn. Have you ever encountered the following problems?

You have read many methods for growing roses, and at the time you felt they were very useful.

But when you really have to put them into practice, you find you simply do not know how.

From this point, it can be told to you that fragmented growing methods, although useful, are not suitable for you right now. What you need now issystematic rose growing theory. For this reason, Lanyao'sThe Road for Rose Beginners to Quickly Advance to Master Growersystematic course was born. This course can help you avoid many detours,saving at least 2 years. Because Lanyao has already walked all these detours. If you need to study Lanyao's "The Road for Rose Beginners to Quickly Advance to Master Grower" systematic course, long-press the QR code below and order it directly.

You are welcome to share it with more flower lovers so they know. Flower lovers who need rose seedlings can go to the Lanyao flower shop to buy them. Roses have already been newly stocked!