Rose plants tend to age after suffering from waterlogging and pests and diseases

When rose plants have been grown for a long time, the branches become thin and weak with few flowers, the branches dry up after pruning, the leaves and petals become thin in texture and pale in color, and the leaves turn yellow and fall off. This condition is often a sign of rose aging. Generally, waterlogging and pests and diseases are the two main causes of rose aging. The editor will now analyze for you the effects of waterlogging and pests and diseases on rose aging and how to deal with them.

Rose

1. Waterlogging: its symptoms are yellowing and falling leaves, withered branches, and rot of part of the root system. There is a smell of distillers' grains. For severely affected plants or where the waterlogged condition is difficult to eliminate, they should be heavily pruned, dug up, and replanted after raising the terrain. For mildly affected plants, the method of piling soil around the base of the plant can be used to stimulate the root crown to produce adventitious roots, thereby achieving the purpose of alleviating the condition.

2. Pests and diseases: leaf spot diseases and powdery mildew caused by fungi cause a large number of leaves to fall off, affecting the formation of the flower surface, and in severe cases the plants die because the leaves cannot carry out photosynthesis. The pathogens begin to infect from late May to early June, and the peak incidence is during the high-temperature rainy season from July to August. Starting from late May, spray 0.3 to 0.5 degrees Baume lime sulfur mixture, once a week, for 2 to 3 consecutive times. If there are signs of a severe outbreak in July to August, spray 40% asomate wettable powder at 500 times dilution, once a week, for 3 consecutive sprayings, which can effectively control it. If there is a lot of rain, the number of sprayings should be increased accordingly. Among insect pests, the longhorn beetle, a trunk-boring pest, causes the most serious damage. Cutting off the twigs and shoot tips damaged by longhorn beetle larvae from mid-June to July is one of the key measures for controlling longhorn beetles. If this step is missed and the larvae bore into a main trunk, it will make control more difficult. Around the Autumn Equinox and Qingming, inspect the tree body, inject 80% dichlorvos emulsion at 5 to 10 times dilution into the insect holes, then seal the openings with mud, and the longhorn beetle larvae can be killed. For other leaf-eating pests, once discovered, spray 800 times monocrotophos to kill eggs and larvae, effectively controlling leaf-eating pests.

What are the signs of rose aging, and how to prevent rose aging

What are the signs of rose aging? The signs of rose aging include symptoms such as yellow leaves and few flowers. Today's article introduces what the signs of rose aging are and information on how to prevent rose aging. Everyone can save this article! The article is really helpful!

How to prevent rose aging

I. Waterlogging

Its symptoms are yellowing and falling leaves, withered branches, and rot of part of the root system. There is a smell of distillers' grains. For severely affected plants or where the waterlogged condition is difficult to eliminate, they should be heavily pruned, dug up, and replanted after raising the terrain. For mildly affected plants, the method of piling soil around the base of the plant can be used to stimulate the root crown to produce adventitious roots, thereby achieving the purpose of alleviating the condition.

II. Pests and diseases

Leaf spot diseases and powdery mildew caused by fungi cause a large number of leaves to fall off, affecting the formation of the flower surface, and in severe cases the plants die because the leaves cannot carry out photosynthesis. The pathogens begin to infect from late May to early June, and the peak incidence is during the high-temperature rainy season from July to August. Starting from late May, spray 0.3 to 0.5 degrees Baume lime sulfur mixture, once a week, for 2 to 3 consecutive times. If there are signs of a severe outbreak in July to August, spray 40% asomate wettable powder at 500 times dilution, once a week, for 3 consecutive sprayings, which can effectively control it. If there is a lot of rain, the number of sprayings should be increased accordingly. Among insect pests, the longhorn beetle, a trunk-boring pest, causes the most serious damage. Cutting off the twigs and shoot tips damaged by longhorn beetle larvae from mid-June to July is one of the key measures for controlling longhorn beetles. If this step is missed and the larvae bore into a main trunk, it will make control more difficult. Around the Autumn Equinox and Qingming, inspect the tree body, inject 80% dichlorvos emulsion at 5 to 10 times dilution into the insect holes, then seal the openings with mud, and the longhorn beetle larvae can be killed. For other leaf-eating pests, once discovered, spray 800 times monocrotophos to kill eggs and larvae, effectively controlling leaf-eating pests.

III. Fertilization

Yellowing leaves, few flowers, small flowers, and thin weak branches are signs of fertilizer deficiency. Apply fertilizer according to the deficient elements, and at the same time apply other element fertilizers together to improve the utilization rate of that element. For severe deficiency of a certain element, when the root system is damaged, or when trace elements need to be applied, foliar fertilization is suitable, with the concentration preferably kept at 0.3%-0.5%. The fertilization time should be chosen in the evening, sprayed from the underside of the leaves. To improve the utilization rate of the fertilizer, a plant vitality stimulant can be added to help the plant return to normal as soon as possible. For weak plants, it is suitable to apply small amounts multiple times, with light fertilizer applied frequently, to prevent fertilizer burn.

IV. Watering

The watering management of roses should adopt the principle of "watering between dry periods." The so-called "watering between dry periods" means watering thoroughly each time, so that the water penetrates deep into the roots, the soil is fully moistened, but not so much that water accumulates, until the water is absorbed and evaporated and the surface soil has dried. Then water again. The interval between two waterings varies with climate conditions, sunlight conditions, plant growth vigor, and soil properties.

It is inappropriate to rigidly stipulate watering once every few days. The principle of "watering between dry periods" can be widely adopted in all regions, only the interval and the degree of dryness should be flexibly controlled according to the local climate, soil, and the growth stage and growth condition of the plant.

To prevent rose aging, put more effort into management, observe the growth of the roses more, and water and fertilize the roses in time. I believe the roses will not age faster. Do the preparatory work well to prevent rose aging, and do the work properly, and the roses will grow luxuriantly! As for management methods, everyone should master them flexibly and not imitate management rigidly without change!

What to do about rose aging? | Prevention, control and rejuvenation of rose aging

I. Waterlogging: its symptoms are yellowing and falling leaves, withered branches, and rot of part of the root system. There is a smell of distillers' grains. For severely affected plants or where the waterlogged condition is difficult to eliminate, they should be heavily pruned, dug up, and replanted after raising the terrain. For mildly affected plants, the method of piling soil around the base of the plant can be used to stimulate the root crown to produce adventitious roots, thereby achieving the purpose of alleviating the condition.

II. Pests and diseases: leaf spot diseases and powdery mildew caused by fungi cause a large number of leaves to fall off, affecting the formation of the flower surface, and in severe cases the plants die because the leaves cannot carry out photosynthesis. The pathogens begin to infect from late May to early June, and the peak incidence is during the high-temperature rainy season from July to August. Starting from late May, spray 0.3 to 0.5 degrees Baume lime sulfur mixture, once a week, for 2 to 3 consecutive times. If there are signs of a severe outbreak in July to August, spray 40% asomate wettable powder at 500 times dilution, once a week, for 3 consecutive sprayings, which can effectively control it.

If there is a lot of rain, the number of sprayings should be increased accordingly. Among insect pests, the longhorn beetle, a trunk-boring pest, causes the most serious damage. Cutting off the twigs and shoot tips damaged by longhorn beetle larvae from mid-June to July is one of the key measures for controlling longhorn beetles. If this step is missed and the larvae bore into a main trunk, it will make control more difficult. Around the Autumn Equinox and Qingming, inspect the tree body, inject 80% dichlorvos emulsion at 5 to 10 times dilution into the insect holes, then seal the openings with mud, and the longhorn beetle larvae can be killed. For other leaf-eating pests, once discovered, spray 800 times monocrotophos to kill eggs and larvae, effectively controlling leaf-eating pests.

III. Fertilization: yellowing leaves, few flowers, small flowers, and thin weak branches are signs of fertilizer deficiency. Apply fertilizer according to the deficient elements, and at the same time apply other element fertilizers together to improve the utilization rate of that element. For severe deficiency of a certain element, when the root system is damaged, or when trace elements need to be applied, foliar fertilization is suitable, with the concentration preferably kept at 0.3%-0.5%. The fertilization time should be chosen in the evening, sprayed from the underside of the leaves. To improve the utilization rate of the fertilizer, a plant vitality stimulant can be added to help the plant return to normal as soon as possible. For weak plants, it is suitable to apply small amounts multiple times, with light fertilizer applied frequently, to prevent fertilizer burn.

Under normal circumstances, roses produce many flowers and require a large amount of fertilizer. Base fertilizer should be applied after winter pruning and before budding. Sufficient organic fertilizer should be applied, with the fertilization range at the outer edge of the crown diameter and a depth of 20 to 30 cm. During the growing season, fertilizer should be applied multiple times as a top dressing: at the leaf expansion stage, after full bloom, and in early August. Quick-acting nitrogen, phosphorus, and potassium are suitable for top dressing. When leaves expand, new roots grow in large numbers, so fertilizer should be applied in small amounts, and concentrated fertilizer should not be applied, so as not to affect new root growth. For top dressing at the end of August, there should be less nitrogen fertilizer and more phosphorus and potassium fertilizer, to prevent autumn shoots from growing too vigorously and being damaged by frost. Top dressing depends on plant size and growth condition, generally 100 to 150 grams per plant each time is suitable.

IV. Pruning: pruning is divided into growing-season pruning and winter pruning. Growing-season pruning: first, promptly cut off the flower stalks and dead branches after flowering, and cut off the rootstock suckers sprouting from the base of grafted plants. Second, 20 days after the previous flush of flowers fades, shorten the current-year branches that have flowered, leaving 8 to 12 buds, to obtain high-quality flowering branches.

Winter pruning is intended to promote the full return of nutrients from branches and leaves, and is best carried out 3 to 4 weeks after frost. The general principle of pruning is to cut off diseased and pest-damaged branches and thin weak branches, thin out parallel branches, overly dense branches, and inward-growing branches, remove straight branches and keep slanted ones, heavily prune weak trees and weak branches, and lightly prune strong trees and strong branches. Of course, the specific pruning method should also be treated differently according to variety and form.

① Roses grown in clumps should achieve a colorful effect, requiring tall plants and many flowers, not requiring especially large flowers. The pruning height left should be 100 to 120 cm, with each branch retaining 15 to 2 pairs of plump strong buds.

② For cultivation as a variety requiring short plants and large flowers, low pruning is suitable. Each plant should retain 3 to 5 main branches, each main branch 30 to 45 cm long, retaining 6 to 8 buds.

③ When climbing roses are grown creeping along the ground, for those that bloom only once a year, the branches that have flowered should be cut off after flowering, leaving the branches that have not flowered and stimulating new branches to sprout from the base to bloom the following year. For those that bloom multiple times a year, after flowering cut off the tips of the short branches that have flowered, leaving 2 buds at their base, to promote new lateral branches to bloom.

For those that bloom once a season, always maintain 5 to 7 branches, reasonably determine the number of lateral branches according to the space available, and leave 3 to 4 buds on the lateral branches for flowering. When grown on trellises or fence frames, in order to achieve a full and dense effect, more main vines should be retained, and the above pruning techniques should be applied to the first-level and second-level lateral branches, so as to achieve abundant flowers and lush branches.

④ For shrub rose hedges, the requirements of neat appearance, dense branches and leaves, abundant and brightly colored flowers, no gaps, and no bare legs should be met. The pruning method of "one-cut flat" should be adopted on the same plane, and the pruning time should be staggered from flowering.

By mastering the above technical points, roses can basically be made to have strong branches, lush leaves, and abundant flowers.