What to Do When Rose Leaves Turn Yellow at the Tips? Key Autumn Care and Management Points
After National Day, temperatures dropped by several degrees, and many flower growers say the leaves of their roses have developed leaf blight and yellowing, asking whether this is the autumn leaf-drop phenomenon? It is true that roses are affected by autumn temperatures, but the poor growth of roses in autumn is mainly a matter of management and care, so timely care and management are very necessary. Below, the editor of Huinong Network will talk with you about the key technical points for managing roses in autumn.
1. Soil selection in autumn
Because the weather has cooled somewhat, timely addition of soil is crucial. You can choose to add soil and apply topdressing at the same time, which can effectively supplement the nutrient supply roses need and is also good for their growth and survival in autumn. First, you can choose fully decomposed manure or cake fertilizer for topdressing. Compared with other chemical fertilizers, farmyard manure not only adds the nutrients needed as fertilizer, but cake fertilizer and decomposed organic fertilizer can also provide a certain insulation effect, which is also the reason for topdressing in autumn.
2. Pruning management of roses
First of all, when caring for roses you should prune them in a timely manner, but in this golden October, you should note that after your roses bloom, pruning should be avoided after October, because pruning roses is not good for their growth, and new shoots will appear after pruning. Under the lower temperatures of autumn, this is not good for the plant's growth. Therefore, after October roses should not be pruned; otherwise yellowing leaves and leaf blight can occur. So in future care, avoid pruning after golden October.
3. Topdressing work for roses
Many rose growers like to apply topdressing in autumn, which is correct, but if topdressing is done improperly, rose leaves can turn yellow or develop leaf blight, so timely and correct fertilization is very necessary. First, control the amount of topdressing for roses, because too much topdressing will cause nutrient excess in the rose plant, so timely and moderate topdressing of roses is crucial.
Then, when choosing topdressing, cake fertilizer and farmyard manure are more suitable. Friends who want to use compound fertilizer must remember to apply less nitrogen fertilizer, or even no nitrogen fertilizer, and appropriately increase phosphorus and potassium fertilizer. Only in this way can the yellowing or leaf blight of rose leaves be kept in check, so as to support the plant's growth and lush foliage.
The above are the key care and management points for autumn roses compiled by the editor of Huinong Network. Finally, autumn care of roses is very important, as it can prevent the leaves of rose plants from turning yellow and developing leaf blight. Flower growers must be patient in caring for them.
How to Care for Roses and What Precautions to Take
Roses hold an irreplaceable place in history. Roses originated in China and have a long history of cultivation, and have long been known as the "queen of flowers." They prefer warm environments with ample sunlight. They are relatively cold-tolerant and highly adaptable. They bloom naturally and continuously, with graceful flower forms, brilliant colors, rich fragrance, a very long flowering period, and wide adaptability, making them one of the world's most important cut flowers and potted flowers. How are roses grown?
The dark appearance of roses makes their owner feel more energized. Usually, dark things give people a visual impact. Just imagine: if you come home and face four walls that are all white, and see furniture that is all light-colored, it feels very lifeless. If you suddenly see a vigorously growing rose beside the TV, you will immediately feel energized, because your vision has experienced a sudden change. When a person feels refreshed, life also becomes especially lively, and everything feels particularly good.
Below, we will discuss rose care from the three major aspects of caring for roses.
1. Getting it to bloom requires effort.
(1) Sunlight must be long. The place where roses are planted must be both well ventilated and able to receive more than half a day of sunlight. This is the primary condition for them to bloom profusely. If placed in a spot with half shade and half sun or in a shaded place with insufficient light, they can bloom at most only in spring and autumn each year. Therefore, households whose living conditions cannot meet the light requirements are best off not growing roses and instead growing flowers and plants that are more shade-loving.
(2) Prune often. Although sunlight conditions may be good, roses will still not grow well if they are not pruned for a long time. The pruning method is as follows. After December each year, when the rose leaves fall, prune once, leaving branches about 15 cm high, cutting about 1 cm above an outward-facing leaf bud, and at the same time remove side branches, diseased branches, and concentric branches. After May, each time a bloom finishes, cut away 2/3 or 1/2 of the branch that has flowered, so there will be more opportunities for regenerated flower buds. If you want the flowers to be larger, you can also remove some buds when there are many, which both concentrates nutrients and achieves the goal of extending the flowering period and having blooms open in batches.
(3) Fertilize frequently and promptly. Generally, newly planted or transplanted potted roses can be grown in loose loess rich in humus, preferably mixed with 1/4 rice husk ash or a little broad bean shell, bean cake, or chicken and pigeon manure, so that roses can continuously absorb nitrogen, phosphorus, potassium, and other nutrients from the soil.
(4) Repotting. Roses do not need to be repotted or have their pots turned every year. If moving from a small pot to a larger pot, this can be done in any season.
2. When caring for roses, focus on disease prevention and treatment. Disease prevention mainly includes the following:
(1) Fungal infections:
Black spot: It mainly attacks leaves, leaf stalks, and tender shoots. When the disease first appears on leaves, small purple-brown to brown spots appear on the upper surface, and after expanding they are mostly round or irregular dark brown lesions. Fungicides such as carbendazim, thiophanate-methyl, and daconil can be sprayed.
Powdery mildew: It attacks tender leaves, with white powdery material appearing on both sides. Early symptoms are not obvious. After the white powdery layer appears for 3--5 days, the leaves become water-soaked, gradually lose green color and turn yellow, and severe damage causes leaf drop. Spraying carbendazim or triadimefon during the onset period is sufficient, but Guoguang Yingna has the best effect.
Leaf blight: It mostly invades at leaf tips or leaf margins, initially as small yellow spots, then rapidly expands inward into irregular large lesions. In severe cases, 2/3 of the whole leaf blights, the diseased area loses green and turns yellow, then dries, turns brown, and falls off. To prevent and control the above diseases, in addition to strengthening fertilizer and water management, diseased branches and leaves should be cut off in winter, fallen leaves on the ground should be cleared away, and initial infection sources should be reduced. When the disease occurs, comprehensive control should be adopted, and fungicides such as carbendazim and thiophanate-methyl should be sprayed.
Disease control is mainly preventive. During high-temperature, high-humidity, or rainy seasons, spray fungicides regularly, and when seedlings enter dormancy, spray lime sulfur mixture for comprehensive sterilization.
The Effects and Functions of Roses and How to Grow Them
Rose (scientific name: RosachinensisJacq.), known as the queen of flowers and also called "Yueyuehong," is an evergreen or semi-evergreen low shrub that blooms in all four seasons, generally red, pink, or occasionally white and yellow. It can be used as an ornamental plant and also as a medicinal plant, and is also called rose. There are three natural varieties. Modern roses have diverse flower forms, including single-petaled and double-petaled, as well as elegant forms such as high-centered with rolled edges; their colors are brilliant and rich, including not only single colors such as red, pink-yellow, and white, but also mixed-color and silver-edged varieties; most varieties are fragrant. There are many rose varieties, with nearly ten thousand in the world and more than a thousand in China.
The natural flowering period is from August to April of the following year. The flowers are large, opening from the inside outward in a spreading form, with a rich fragrance. They can be widely used in horticultural cultivation and as cut flowers. Roses are highly adaptable and cold-tolerant and cold-tolerant, and can be grown whether in the ground or in pots. They are suitable for beautifying courtyards, decorating gardens, arranging flower beds, and planting as flower hedges and trellises. Roses are easy to cultivate and can be used as cut flowers for bouquets and various flower baskets. Rose flowers can be used to extract essence and can also be used medicinally. They also have good antifungal activity and synergistic anti-drug-resistant fungal activity. Red cut roses have also become one of the must-give gifts between lovers and have become a theme in love poetry.
China is one of the places of origin of roses. Rose flowers are beautiful, varied in form, and bloom in all four seasons, and are deeply loved by people. In China, 52 cities have selected it as their city flower. In May 1985, the rose was rated fifth among China's top ten famous flowers. Below, let's take a look at the effects and functions of roses and how to grow them.
Introduction to Roses
1. Understand roses in depth from each part of the rose.
Flower: The flower is borne at the top of the stem, either solitary or clustered. There are single-petaled, semi-double, and double forms, with rich flower colors and diverse flower shapes.
Fruit: The rose fruit is spherical or pear-shaped. Before maturity it is green, and when mature it is orange-red. It contains 5-13 bony achenes. Seed: The outer layer of the rose seed is the pericarp. The pericarp has inner and outer layers; the outer layer is a bony layer and very hard; the inner layer is a fibrous layer with interwoven fibers and strong toughness. The seed coat is a very thin membranous layer tightly wrapping the embryo. There is a certain gap between the pericarp and the seed coat.
Leaf: The leaves are alternate and are odd-pinnately compound; leaflets number 3-7, ovate or oblong; leaf margins are serrated. In most varieties the leaf surface is smooth and glossy (some varieties are rough and dull). In most varieties, when the leaves first unfold they are purplish red, then gradually turn green.
Stem: The young stems of roses are purplish red, tender stems are green, and old stems are grayish brown; the stems bear sharp, upright prickles, and the density of prickles varies by variety.
Root: The morphology of the rose root system is closely related to the propagation method. Seedling plants have an obvious main root and strong lateral roots; plants propagated by cuttings have only lateral roots, no main root, and the number of lateral roots is relatively small, with poorer vitality.
2. Roses have many alternative names. Alternative names for roses include Four Seasons Flower, Yueyuehong, Shengchun, Douxuehong, Yueguihua, Yueji, Yueyuekai, Changchun Flower, Yueyue Flower, Yanxuehong, Chou spring Flower, Yuejihong, Lepao, Moonlight Flower, Sixiangchun, and Yueqi Flower.
3. Roses hold an irreplaceable place in history. Roses originated in China and have a long history of cultivation, and have long been known as the "queen of flowers." They prefer warm environments with ample sunlight. They are relatively cold-tolerant and highly adaptable. They bloom naturally and continuously, with graceful flower forms, brilliant colors, rich fragrance, a very long flowering period, and wide adaptability, making them one of the world's most important cut flowers and potted flowers.
There are many rose varieties. By flower color: white, green, yellow, pink, red, purple, and so on, as well as bicolored or those with stripes and spots.
By plant form: upright types with tall, straight, sturdy plants, and climbing roses with soft, long branches that grow by attaching to other objects.
By flowering habit: vigorous-flowering varieties that bloom continuously from May to October in open-field cultivation and can bloom in all four seasons in greenhouse cultivation; two-season types that bloom only in spring and autumn; and one-season types that bloom only once in spring.
By the origin and development of varieties: they can be divided into two major categories, old-style roses and modern roses.
By horticultural classification, they can be divided into nine categories: Chinese rose, miniature rose, Ten Sisters rose, polyantha rose, large-flowered polyantha rose, large-flowered single rose, climbing rose, tree rose, and wild rose. Among them, the Ten Sisters type is the most common; one plant can produce more than 50 flowers, with a light, elegant fragrance, and blooms in all four seasons. The large-flowered single type is characterized by huge flowers, with each flower reaching up to 20 cm in diameter; the petals are full, the colors are vivid, and the fragrance is strong, making it the most popular.
This is the rose.
The Effect of Roses on the Home Environment
Below we will analyze in depth the influence of roses on the home environment.
1. A rose in the home gives you a home full of poetry. Different kinds of roses have different flower languages. For example, the flower language and symbolic meaning of pink roses: first love, elegance, nobility, gratitude; the flower language and symbolic meaning of red roses: pure love, passionate love, chastity, courage; the flower language and symbolic meaning of white roses: respect, loftiness, purity; the flower language and symbolic meaning of orange-yellow roses: full of youthful spirit, beauty; the flower language and symbolic meaning of green-white roses: innocence, frugality, or a pure heart; the flower language and symbolic meaning of black roses: individuality and creativity; the flower language and symbolic meaning of blue-purple roses: preciousness, cherishing. With such an interesting flower, planting one gives your whole home a new face.
2. The dark appearance makes the owner feel more energized. Usually, dark things give people a visual impact. Just imagine: if you come home and face four walls that are all white, and see furniture that is all light-colored, it feels very lifeless. If you suddenly see a vigorously growing rose beside the TV, you will immediately feel energized, because your vision has experienced a sudden change. When a person feels refreshed, life also becomes especially lively, and everything feels particularly good.
3. The role of greening the home is also self-evident. Roses are evergreen or deciduous shrubs, with green branchlets and scattered prickles, and some are almost thornless. The leaf margins are serrated, both sides are hairless and smooth, and the stipules are fused with the leaf stalk. The flowers are borne at the top of the branches, usually clustered, rarely solitary, with many flower colors. There are countless varieties, mostly double-petaled but also single-petaled. The flowers have a slight fragrance. The fleshy rose hip turns red-yellow when mature, splits open at the top, and the "seeds" are achenes, chestnut brown. Such beautiful roses constantly absorb components in the air that are harmful to human life and release oxygen beneficial to the human body, thus achieving the greening effect without notice.
The Feng Shui Role of Roses
Let's take a look at the feng shui role of roses!
First, planting roses in your own garden can make family members feel refreshed and energized. Roses are evergreen or deciduous shrubs, with green branchlets and scattered prickles, and some are almost thornless. The leaf margins are serrated, both sides are hairless and smooth, and the stipules are fused with the leaf stalk. The flowers are borne at the top of the branches, usually clustered, rarely solitary, with many flower colors. There are countless varieties, mostly double-petaled but also single-petaled. The flowers have a slight fragrance. The fleshy rose hip turns red-yellow when mature, splits open at the top, and the "seeds" are achenes, chestnut brown. Its bright red appearance makes people feel energized. At the same time, note that roses are relatively toxic plants, so we should not plant them in places close to us, such as the living room and bedroom, and when planting them in the garden we should not plant too many, because their fragrance is toxic.
Then, plant a few roses in the backyard of the home, and the family's life becomes happier and happier. The flower language and symbolic meaning of pink roses: first love, elegance, nobility, gratitude; the flower language and symbolic meaning of red roses: pure love, passionate love, chastity, courage; the flower language and symbolic meaning of white roses: respect, loftiness, purity; the flower language and symbolic meaning of orange-yellow roses: full of youthful spirit, beauty; the flower language and symbolic meaning of green-white roses: innocence, frugality, or a pure heart; the flower language and symbolic meaning of black roses: individuality and creativity; the flower language and symbolic meaning of blue-purple roses: preciousness, cherishing. The symbolic meaning of roses is very clear. If a family lives together every day and looks at roses from afar, associating them with the meanings they represent, and thereby cherishes every day of living with family, happiness begins right there, and the home they live in together also becomes a feng shui home.
The Effects of Roses
The effects of roses are mainly divided into the following aspects.
1. Roses have strong medicinal value.
1. When women experience amenorrhea or scanty menstruation that is light in color and small in volume, lower abdominal pain, accompanied by poor spirits and dry, constipated stool, or when the above symptoms appear during menstruation, treatment with Shengchun Decoction has a good effect. The medicinal composition of Shengchun Decoction is: rose 10g, angelica 10g, salvia 10g, white peony 10g, plus an appropriate amount of brown sugar, decocted in clear water and taken. The decoction tastes sweet and fragrant, with no difficulty in swallowing. Take 3 doses 3-5 days before each menstruation, adding one egg to cook with it each time. Its effect is reliable, and it truly deserves to be a wonderful formula for regulating menstruation, regulating qi, and activating blood.
2. Used together with bitter orange flower, rose is an excellent formula for treating menstrual diseases caused by disharmony of qi and blood. Use 15g each of rose and bitter orange flower, decoct in water and take. Rose emphasizes activating blood, while bitter orange flower tends to move qi. Used together, one qi and one blood, regulating both qi and blood, their effects of regulating menstruation and activating blood, moving qi and relieving pain are very good. It mainly treats women's liver qi stagnation, qi-blood imbalance, and obstructed meridians, leading to irregular menstruation, chest and abdominal pain, poor appetite, or even nausea and vomiting.
3. Steep 20g of fresh rose in boiling water and take it to treat irregular menstruation or abdominal pain during menstruation;
4. Use 30g of rose root and 15g each of cockscomb and motherwort, decoct in water and cook eggs to eat, which can treat dysmenorrhea;
5. For excessive menstruation and excessive vaginal discharge, use 15g of rose (or root), decoct in water and take, or stew with pork and eat;
6. Decoct 10g of rose and 12g of jujube together, and after the decoction is ready add an appropriate amount of honey and take it. This formula is fragrant and sweet, not like medicine, and is very effective for menopausal hot flashes.
7. Women often steep rose petals in water as tea, or add them to other beauty teas, which can also activate blood and beautify the face, helping people stay youthful.
8. To treat cough with blood due to lung deficiency: stew rose with rock sugar and take it, effective when taken continuously.
9. To treat muscle and bone pain and traumatic injuries: dry roses and grind them into powder, take 3 grams each time, taken with wine.
10. To treat unruptured scrofula: mash fresh rose leaves and apply to the affected area (red flowers are also acceptable).
11. To treat muscle and bone pain and traumatic injuries: mash tender rose leaves and apply to the affected area.
12. To treat seminal emission: 30 grams of rose root, 10 grams of peony root, 15 grams of lily, decoct in water and take.
2. It can enrich our recipes.
Rose porridge requires 100 grams of japonica rice, 50 grams of longan flesh, 30 grams of roses, and 50 grams of honey.
1. Wash the japonica rice clean, soak it in cold water for half an hour, remove, and drain.
2. Cut the longan flesh into pieces.
3. Add about 1000 ml of cold water to the pot, put in the japonica rice and chopped longan flesh, bring to a boil over high heat, then switch to low heat and simmer into porridge. Add honey and roses, stir evenly, and it is ready to serve.
This food can beautify the face and treat irregular menstruation.
Rose Soup
It requires 50 grams of roses, 30 grams of rock sugar, and 10 grams of yellow wine.
1. Wash the roses clean, add 150 ml of water, and simmer over gentle heat until reduced to 100 ml.
2. Remove the residue and take the liquid, then add an appropriate amount of rock sugar and yellow wine.
This food can move qi and activate blood, and is suitable for qi stagnation and blood stasis, amenorrhea, dysmenorrhea, and so on. Roses activate blood and regulate menstruation, reduce swelling, and relieve pain. They are effective for dysmenorrhea, amenorrhea, and boils and swelling from toxins, but their nature is warm and they break qi, so those with blood heat or qi deficiency should not drink it.
3. It has great ornamental value. Rose varieties of different colors include:
1. Red series: Royal Carriage, Dushu Terrace, Uncle Walter (classic variety), Orange-Red Flame, Vermilion Queen, Chang'e Flying to the Moon, Summer Camp, Mozart, and so on.
2. Yellow series: Spectrum (classic variety), Jubilation, Long Rainbow, Golden Sunshine, King of Light, and so on.
3. Pink series: Orchid Moon, Grand Parade (classic variety), Angela, and so on.
4. White series: White River, Climbing Green Cloud.
5. Bicolor series: Pierre de Ronsard (classic variety), Flower Fairy, Flying Tiger, Flower Soul, Climbing Electronic Watch, Purple Robe Jade Belt, and so on.
6. Orange series: Kunteng, Western Land, Sweet Dream, Stream, and so on.
If rose varieties of different colors are all planted in your home, your home will surely be colorful, like a rainbow world.
The Role of Roses in Matching Home Styles
With eyes open to discovery, let's look together at how roses match home styles.
1. Use roses to create an elegant and noble home style. Roses are evergreen or deciduous shrubs, with green branchlets and scattered prickles, and some are almost thornless. The leaf margins are serrated, both sides are hairless and smooth, and the stipules are fused with the leaf stalk. The flowers are borne at the top of the branches, usually clustered, rarely solitary, with many flower colors. There are countless varieties, mostly double-petaled but also single-petaled. The flowers have a slight fragrance. The fleshy rose hip turns red-yellow when mature, splits open at the top, and the "seeds" are achenes, chestnut brown. With such a gentle and elegant appearance, the noble and elegant style can only belong to it.
2. It reflects lofty ideals of home life. Different kinds of roses have different flower languages. For example, the flower language and symbolic meaning of pink roses: first love, elegance, nobility, gratitude; the flower language and symbolic meaning of red roses: pure love, passionate love, chastity, courage; the flower language and symbolic meaning of white roses: respect, loftiness, purity; the flower language and symbolic meaning of orange-yellow roses: full of youthful spirit, beauty; the flower language and symbolic meaning of green-white roses: innocence, frugality, or a pure heart; the flower language and symbolic meaning of black roses: individuality and creativity; the flower language and symbolic meaning of blue-purple roses: preciousness, cherishing. With such an interesting rose, planted at home, when guests see it, can this home style of striving for life ideals not be reflected?
3. Planting roses at home reflects a harmonious and leisurely home style and life aspiration. Peace rose was bred by the Frenchman Francis Meilland in 1939 under the iron heel of fascism. Under the code 3-35-40, this rose was sent to the United States. After American horticulturist Robert Pyle received this variety that had crossed the ocean, he immediately distributed it to important nurseries in the northern and southern United States for propagation. A few years later, this new variety made a comeback and caused a sensation throughout the United States. In 1945, the American Pacific Rose Society named this variety Peace and declared: We firmly believe that this new rose variety, the most remarkable of the contemporary era, should be named after the greatest wish of the people of the world today, "peace." We believe that the Peace rose will serve as a model and grow forever in the gardens of our descendants. On the day the Peace rose was named, it happened that the allied forces captured Berlin and Hitler was destroyed. And when the Peace rose received the unconditional surrender of the American imperialists. When the United Nations was established and held its first meeting in San Francisco, in the vase of every delegate's room there was a bouquet of Peace roses presented by the American Rose Society. On it was a note reading: We hope the "Peace" rose can influence people's thoughts and give the world lasting peace. During World War II, fascist bandits in a village called Lidice, fourteen kilometers from Prague, killed 175 men over the age of fifteen and imprisoned women and children in concentration camps. After the war, to commemorate these people, many rose experts and some voluntary donors built a rose garden there in 1955, in which the main variety was Peace.
From this it can be seen that the quietly understated appearance of roses can nevertheless make such a great contribution to our home style. It is truly extraordinary.
How to Grow Roses
Below, we will discuss rose care from the three major aspects of caring for roses.
1. Getting it to bloom requires effort.
(1) Sunlight must be long. The place where roses are planted must be both well ventilated and able to receive more than half a day of sunlight. This is the primary condition for them to bloom profusely. If placed in a spot with half shade and half sun or in a shaded place with insufficient light, they can bloom at most only in spring and autumn each year. Therefore, households whose living conditions cannot meet the light requirements are best off not growing roses and instead growing flowers and plants that are more shade-loving. (2) Prune often. Although sunlight conditions may be good, roses will still not grow well if they are not pruned for a long time. The pruning method is as follows. After December each year, when the rose leaves fall, prune once, leaving branches about 15 cm high, cutting about 1 cm above an outward-facing leaf bud, and at the same time remove side branches, diseased branches, and concentric branches. After May, each time a bloom finishes, cut away 2/3 or 1/2 of the branch that has flowered, so there will be more opportunities for regenerated flower buds. If you want the flowers to be larger, you can also remove some buds when there are many, which both concentrates nutrients and achieves the goal of extending the flowering period and having blooms open in batches.
(3) Fertilize frequently and promptly. Generally, newly planted or transplanted potted roses can be grown in loose loess rich in humus, preferably mixed with 1/4 rice husk ash or a little broad bean shell, bean cake, or chicken and pigeon manure, so that roses can continuously absorb nitrogen, phosphorus, potassium, and other nutrients from the soil.
(4) Repotting. Roses do not need to be repotted or have their pots turned every year. If moving from a small pot to a larger pot, this can be done in any season.
2. When caring for roses, focus on disease prevention and treatment. Disease prevention mainly includes the following:
(1) Fungal infections:
Black spot: It mainly attacks leaves, leaf stalks, and tender shoots. When the disease first appears on leaves, small purple-brown to brown spots appear on the upper surface, and after expanding they are mostly round or irregular dark brown lesions. Fungicides such as carbendazim, thiophanate-methyl, and daconil can be sprayed.
Powdery mildew: It attacks tender leaves, with white powdery material appearing on both sides. Early symptoms are not obvious. After the white powdery layer appears for 3--5 days, the leaves become water-soaked, gradually lose green color and turn yellow, and severe damage causes leaf drop. Spraying carbendazim or triadimefon during the onset period is sufficient, but Guoguang Yingna has the best effect.
Leaf blight: It mostly invades at leaf tips or leaf margins, initially as small yellow spots, then rapidly expands inward into irregular large lesions. In severe cases, 2/3 of the whole leaf blights, the diseased area loses green and turns yellow, then dries, turns brown, and falls off. To prevent and control the above diseases, in addition to strengthening fertilizer and water management, diseased branches and leaves should be cut off in winter, fallen leaves on the ground should be cleared away, and initial infection sources should be reduced. When the disease occurs, comprehensive control should be adopted, and fungicides such as carbendazim and thiophanate-methyl should be sprayed.
Disease control is mainly preventive. During high-temperature, high-humidity, or rainy seasons, spray fungicides regularly, and when seedlings enter dormancy, spray lime sulfur mixture for comprehensive sterilization.
The above is an introduction to the effects and functions of roses and how to grow them. For more home plants, please stay tuned.