Content
Rosehip is a crop that can decorate any garden plot and also benefit human health. The fruits, leaves and flowers of the plant are valuable, as they contain a large amount of vitamins and a complex of minerals. This shrub belongs to the category of unpretentious crops, so it does not cause much trouble for the gardener. However, if the growing conditions are inappropriate, its immunity weakens. Therefore, you should study common diseases of rosehip and its pests, and also become familiar with how to deal with them.
Most often, rose hips are affected by fungal diseases.
Causes of diseases and pests
This crop is a wild form of garden roses. Therefore, it is more hardy and unpretentious. However, for the bush to fully grow and develop, certain conditions are necessary. If they do not correspond, the plant weakens.
Main reasons:
- sudden temperature changes;
- prolonged stagnation of moisture in the soil;
- dry air;
- lack of nutrients;
- dense plantings;
- bad light;
- unsuitable climate.
Rosehip diseases and their treatment
Most diseases of this shrub can be successfully treated. However, to prevent the defeat from causing serious damage to the plant, it is necessary to take measures at the initial stage of their development. Therefore, you need to study photos and descriptions of the main rosehip diseases and methods of treating them. This will allow you to easily identify the problem and fix it in a timely manner.
Powdery mildew
Powdery mildew is caused by various fungi from the order Erysiphales. Provoking factors: high humidity and high temperature. The disease can be recognized by white spots on the leaves, which subsequently increase in size and cover the plates completely. This interferes with the process of photosynthesis.
Over time, the plaque thickens and acquires a dirty gray tint, as the overwintering stages of the pathogenic fungus appear in it. As a result, the affected leaves gradually wither and fall off. If left untreated, the shoots of the bush may remain completely bare. Subsequently, the disease spreads to young shoots and buds of the plant.
To treat the disease powdery mildew on rose hips, it is necessary to spray the crown with “Topaz”, “Tiovit” and “Skorom”.
Powdery mildew leads to disruption of metabolic processes in tissues
Rust
The causative agent is the fungus Phragmidium disciflorum (Tode) James. Rust is a disease of rose hips that affects the stems, young shoots and leaves of the plant. Warm weather and high humidity in the spring contribute to its spread.
The affected shoots of the bush become significantly thicker and crack due to the disease. A bright red, dusty powder emerges from open wounds.
On rosehip leaves, rust appears as round spots. On the reverse side of the plates, orange pustules covered with spores grow in their place. Pathogens are stored in plant debris and cracks in the bark, where they overwinter. Rust disease is more common in yellow rose hips.
If signs of this disease are detected on the rose hips, it is necessary to remove all affected areas and burn them. After this, you need to spray the bush with a 3% solution of copper sulfate, and a week later repeat the treatment, but with 1% Bordeaux mixture.
Cracks in the bark due to rust subsequently turn into superficial brown ulcers
Black spot
The causative agent of black spot is the fungus Marssonina rosae. The disease affects leaves, but sometimes also young growing shoots. You can identify it on rose hips by rounded spots of brown, almost black color. Initially they are small, single, with a diameter of 5-15 mm. Subsequently, black scabs—fungal spores—appear on the necrotic areas.
Affected leaves gradually turn brown and fall off. As a result, by autumn, completely bare rosehip shoots remain. The pathogen persists in winter in plant debris and bark cracks.
To treat black spot, it is recommended to first clean the rosehip bush from affected leaves and shoots, and then spray it twice with Hom every 7 days.
Young stems do not ripen due to black spot disease
Septoria spot
The disease manifests itself as numerous round spots on the leaves, which are randomly scattered. The causative agent of Septoria spot is the fungus Septoria rosae Desm.As the disease progresses, a light spot appears in the center of the necrotic areas. But along the edge a thin brown rim remains.
Over time, small black fruiting bodies form in this place, within which spores ripen. The affected plates wither, which leads to premature leaf fall. If favorable conditions exist, the disease spreads to rose hips and young shoots. This causes areas of the bark to die. Subsequently, such stems dry out.
To treat rose hips, it is necessary to clear the crown of possible sources of the pathogen. All collected leaves and shoots must be burned. After this, spray with a 1% solution of Bordeaux mixture. If necessary, repeat treatment after a week.
Septoria blight persists in winter in plant debris
Rosehip pests and their control
Not only diseases cause damage to rose hips, but also pests. They weaken the bush, which leads to its freezing in winter. Also, many insects are carriers of infections, which worsens the problem and can cause the death of the plant.
Aphid
This small insect feeds on the juice of young leaves and shoots. Aphids (Aphidoidea) are capable of forming entire colonies. Initially, the pest can be detected from the back of the plates. As a result of their vital activity, the leaves become deformed, the buds do not open, and the fruits become smaller.
To combat the pest, it is necessary to spray the plant with Inta-Vir, Decis or Confidor Extra.
When widespread, numerous aphids cling to the tops of the stems
leaf roller
This pest parasitizes mainly on fruit trees in the garden, but if it spreads massively, it can switch to rose hips. A characteristic sign of damage is rosehip leaves curled inward. The adult leaf roller is a yellow butterfly with brown patterns on the body. It reaches 15-20 mm in length.
The leaf roller (Tortricidae) lays eggs that overwinter on the plant. And with the arrival of spring warmth, voracious caterpillars emerge from them. They are the ones who harm the rosehip, as they eat its flowers, buds and pistils.
To destroy the leaf roller, it is necessary to spray the bush in the spring at a temperature of +8 degrees and above with Confidor Maxi, Liber and Cesar.
Peak leaf roller breeding season occurs in July
Moth
This lepidopteran butterfly also attacks rose hips. The moth (Anticlea derivata) has a delicate body and wide wings, the span of which reaches 3 cm. The color of the insect is spectacular. The main color is white, but there are black dots and yellow stripes on it. Moth caterpillars are the same color as adults. They eat rosehip leaves and buds.
To destroy the moth, Zolon, Karbofos, Kinmiks and Decis should be used.
A moth can eat all the leaves on a rosehip if you don’t fight it
Sawfly
There are many types of this pest. All of them resemble a fly in body structure and have membranous wings. Most often, rose hips are affected by the roseate sawfly (Arge ochropus). Its larvae are green, the head is red-brown with a light spot on the back of the head. The insect has 8 pairs of limbs. It feeds on rosehip leaves, eating them around the edges and forming holes.
To destroy it, it is necessary to spray the plant with insecticides: “Kemifos”, “Fufanon”, “Inta-vir”.
Sawfly larvae appear on rose hips at the end of June
Small shooter
This pest is a butterfly. The length of its wedge-shaped body reaches 25 mm. The abdomen is narrowed towards the end of the body. The color of the small arrowhead (Acronictinae) is brown-gray. The chest part of the butterfly is covered with long thick fibers. The danger for rosehip is its caterpillars. They reach a length of 30-40 mm. The body of the larvae is gray-brown with a longitudinal yellow-red stripe, which is interrupted by black transverse lines. The first generation of lancet offspring appears in June, and the second at the end of summer or early autumn. Caterpillars eat rosehip leaves.
To combat lancet, you should use Actofit at the rate of 8 ml per bucket of water. The resulting solution should be sprayed onto the crown of the plant in an even layer.
In addition to rose hips, small lancet eats apple trees, raspberries, hawthorns and plums
Hairy deer
This black beetle is also capable of causing damage to rose hips. Its length varies between 8-12 mm. The body is broadly oval, completely covered with dense gray hairs. The summer period of the woolly fawn (Epicometis hirta poda) lasts from May to August. The beetle eats the petals, stamens and pistils of rosehip flowers. Females lay eggs in the soil, and subsequently hatch into white, curved larvae with a brown head and three pairs of limbs.
When beetles appear on rose hips, they must be collected manually, and the larvae destroyed while digging up the area.
The hairy deer prefers soil rich in vermicompost, where it reproduces offspring
Halewort wavy
This insect with membranous wings also poses a threat to rose hips. The pest causes the formation of single- and multi-chamber galls on fruits, the length of which is 10-12 mm. Their shell grows and increases to a diameter of 22 mm, and then becomes covered with thorns and bursts.
As a result of the vital activity of the wavy gall moth (Rhodites fluctum Rubs), rosehip seeds become spindle-shaped. Over time, the gall becomes brown and dries out. To prevent and destroy the pest, it is recommended to spray the bush before and after flowering with Decis, Karate and Kinmiks.
The gallworm lays eggs in the fall, and offspring hatch from them in the spring.
Prevention
You can minimize the likelihood of developing diseases on rose hips if you follow simple rules of prevention. They also help improve the plant’s immunity, which will allow it to resist attacks from pests.
Preventive measures:
- timely removal of weeds in the root circle;
- carrying out fertilizing taking into account the stages of bush development;
- removal of plant residues in autumn;
- burning fallen leaves;
- loosening the soil at the base of the bush;
- cleaning the crown from broken and damaged shoots;
- treatment of plants against diseases in spring and autumn with Bordeaux mixture.
Conclusion
Pests and diseases of rose hips can significantly weaken the bush. This will lead to the fact that it will not be able to fully develop, bloom and bear fruit. Therefore, to prevent this from happening, it is necessary to regularly inspect the plant and take action if signs of damage appear.
Help protect the remains of the rosehip bush from pests