How to deal with roseate sawfly and roseate borer and get rid of it forever

The roseate sawfly is an insect that actively parasitizes berry and ornamental crops. It affects rose flowers, most often rose bushes, which is why it got its name. The most harmful are the larvae - these inconspicuous creatures eat succulent foliage with appetite and as a result, after their invasion, only bare twigs remain on the bushes. They can also gnaw through shoots, which is why plants begin to rapidly wither. Is there any salvation from this scourge?

Preventive methods of control

Even if the sawfly and borer have not been seen on roses this year, it is better to carry out preliminary work to prevent the appearance of pests.

Reasons for appearance

The roseate sawfly is a flying insect. It moves freely over fairly long distances in search of food. Wild rose hips can “attract” it to your garden plot, so it is recommended to get rid of its thickets.

The gardener himself can “infect” rose bushes. The most common methods are the use of soil in which the larvae overwinter when replanting, throwing out shoots affected by the roseate sawfly into a compost pit, and “storing” plant debris in an area.

Methods of control using chemicals, taking into account the characteristics of pest development

When the adult caterpillar reaches the ground, pupation occurs, which lasts 14 days.
The cocoon matures with the onset of warm weather. The approximate timing of the appearance of adults is the end of May. Taking into account weather conditions, a more accurate time is the flowering of garden strawberries. At this time, it is important to prevent the caterpillar from ending up in the soil. It is important not only to choose the right protective agent against sawfly and borer, but to apply it in time. To do this, you need to know the reproduction cycles of insects.

The sawfly larva is called a false caterpillar and appears at the end of April. At the beginning of development it is white in color and 4 mm long. After a month, the formed body acquires black spots, and the underside of the abdomen turns yellow.

Young larvae accumulate in groups and, as they mature, spread throughout the bush. As adults, after about a month, they move to the soil to pupate.

At this time, you can deal with them using an environmentally friendly method - collecting them by hand .

The flight continues until July. If during this period you notice a small flying insect, 1 cm in size, black and yellow in color, this means that there is a sawfly in the rose garden and you need to treat the bushes with protective insecticides.

Description

The sawfly beetle, depending on the species, can be from 2 to 32 mm long. The head of sawflies is not separated from the body, like that of a wasp or a bee, for which they are called sessile bellies. Sawfly heads are large, mobile, equipped with well-developed jaws, two large eyes and three simple eyes located in front. Sawfly whiskers are bristly or thread-like, and they have two pairs of transparent, non-folding wings. The females have a sawtooth-shaped ovipositor hidden in their abdomen, with which they damage plants. In males, the place where in females there is an opening for the exit of the ovipositor is covered with a plate.

In early spring, sawflies mate, after which the females lay eggs, making an incision in the tissue of one or another part of the plant for each, after which the female seals the pocket with the egg with secretions, protecting both the egg and part of the plant from rotting.

The sawfly larva, as soon as it emerges from the egg, begins to eat, causing significant damage to plants. In the larval stage, sawfly insects are similar to butterfly caterpillars, however, caterpillars have no more than 5 pairs of legs and six eyes, and sawfly larvae have 6 or 8 pairs of legs and only 2 eyes, which is why beetle larvae are called pseudocaterpillars. Having eaten enough, sawfly caterpillars descend from the tree at the beginning of summer and build cocoons for pupation in the ground from their own excrement, dust and saliva. In mid-summer, the second generation of pests emerges from cocoons, and in one season the sawfly can produce up to 4 generations, which eat foliage from spring to autumn.

• How to protect eggplants from the Colorado potato beetle - prevention without chemicals

All sawflies are herbivorous. Each species lives on a specific wild or cultivated plant, damaging it and feeding on its tissues.

Traditional methods of preventing and exterminating sawfly

The smell of common tansy repels roseate sawflies and borers.
In cases where the use of chemicals is not possible, it is better to use more gentle methods. Experienced gardeners use the following methods of preventative protection of roses from sawfly and borer:

• Plants are planted whose smell repels pests. The Rosary can be surrounded by the following “protectors”:

– rejected marigolds, French marigolds, large-flowered marigolds,

– pyrethrum maiden, Caucasian, hybrid,

– yarrow officinalis,

– common tansy,

- wormwood,

– calendula officinalis.

• If roses are located near the garden, then it is better that the closest neighbors are:

– nightshades – tomatoes, eggplants, potatoes,

- hot pepper,

- bird cherry.

The smell of these plants repels insects and acts as a repellent on them.

If pests do appear, you can use herbal decoctions and infusions to combat us. The most popular cooking recipes are:

In addition to plant materials, a solution of soda ash is prepared against the sawfly and borer:

• 3 – 4 tablespoons per 10 liters of water. Multiplicity of treatments 3 – 4 times.

Rose leaf roller

If some rose leaves are curled into a tube, while others are gnawed, it means that a rose leaf roller (also known as a golden leaf roller) has settled on the plant. This pest is not a gourmet. He is not averse to eating almost all deciduous trees, fruit, berry and ornamental shrubs, as well as herbaceous plants.

The roseate leaf roller is a dark brown butterfly whose caterpillars live in folded leaves. In April-May they are reborn, first feed together, skeletonizing one of the leaves, then crawl to the tops of the shoots, gnaw out buds and buds, after which they move on to the flowers, destroying the stamens, pistils and petals.

Older caterpillars roll leaves into tubes or balls, damage ovaries and fruits, gnawing irregularly shaped holes in the pulp. After 30-40 days, the caterpillars pupate in folded leaves.

Threat of sawfly damage to different types of roses

The Crown Princess Margarita variety is one of the varieties that is not resistant to damage by the roseate sawfly.
Unfortunately, there are no varieties that can be said to be not damaged by pests. This does not depend on the group to which the rose belongs. It often happens that insects live on one of the varieties growing nearby, but not on the other. Gardeners have noticed that the sawfly chooses:

• Flammentanza from the group of climbing roses,
• Ilse Krohn Superior - white flowering climber.
• Crown Princess Margaret is a representative of English roses.

You can reduce the damage to roses of any variety and type if you do not plant them next to an orchard or ornamental plants of the Rosaceae family.

What harm does

Infestation of bushes by insects means, at a minimum, late and poor flowering. In most cases, you can’t expect it at all this season - roses are massively losing buds and flower buds on the affected stems.

A rose with darkening and withering shoots noticeably loses its decorative value

Mechanical damage left by the pest on the shoots is a “gateway” for pathogenic fungi. The experience of gardeners shows that infection with pathogenic microflora is almost inevitable.

Bushes attacked by the rose sawfly are greatly weakened. Their cold resistance and overall endurance drops noticeably. It is not a fact that the plant will survive the coming winter. The more demanding a variety is to care for, the higher the likelihood of its death.

Category: “Questions and answers”

Question No. 1. How long do sawflies live?

An adult adult lasts only 10 days, but during this time each female lays an average of up to 70 eggs. If you don't fight them, they will destroy the rose garden.

Question No. 2. How long does it take to get rid of the sawfly?

If there are few pests and the treatment is carried out on time, then once is enough. But, it is better not to risk it and carry out additional spraying and preventive work in the fall and spring of next year. You cannot be sure that the insects will not appear again.

Spider mite

This insect harms not only roses, but the mite especially loves these plants. At first, the leaves become covered with small pale yellow spots, over time they lighten or turn yellow, and if severely affected, they dry out and fall off. In advanced cases, a thin cobweb can be seen at the base of the shoots.

If you look closely at a damaged plant, sometimes you can see the pest itself: the underside of the leaf will be strewn with small white grains. This is a mite (only 0.5-1 mm in size), the body of which is colored brown, green, brown or gray.

Most often, roses grown in greenhouses and indoors suffer from spider mites, since this pest becomes most active in dry air.

Thrips

These pests most prefer fragrant roses with light-colored flowers, but can also cause damage to other plants. Brown or black spots appear on the buds and flowers, the petals look chewed and darkened.

If you rub the flower or look into its core, you can find fast-moving small black insects about 2 mm long. These are thrips - the most difficult pests of roses. As a rule, they appear in hot and dry weather.

Life cycle features

The common pine sawfly grows one or two generations per year, depending on the latitude of its habitat, the emergence of the first occurs in late spring–early summer, the emergence of the second in mid-to-late summer.

The female lays from 8 to 35 eggs at a time in cuts she makes on the needles, and covers them with a foamy coating for preservation. The needles, as a rule, are last year's, most often on the tops of the crowns. Then, after about 20 days, the eggs develop, and larvae emerge from them in 3–4 days.

The larvae stay in large groups, eat off and grow. Depending on the daily temperature, the development period of the larvae ranges from 25 days at +26°C to two months at +10°C. Having finished feeding, the larvae form a cocoon and pupate.

The first generation attaches itself to the crown, development lasts 6–12 days, the second generation moves to the forest floor, where it overwinters. Adults emerge from pupae usually around noon.

The red pine sawfly grows only one generation per year; emergence occurs in late summer–early autumn. Females lay eggs on needles in increments of about 1.5 mm; on average, up to 100 eggs are produced on a shoot, and in outbreaks of reproduction up to 10,000 on one tree.

Egg development ends in spring. The larvae behave similarly to ordinary sawflies. The duration of the development period depends on the temperature, from 30 days at +27°C to one and a half months at +13°C. The larvae in the cocoon lie in the needles of the forest floor until August, then pupate.

They overwinter both as larvae in a cocoon and as eggs.

Red "relative"

The description of this category was first carried out by the French zoologist Geoffroy Saint-Hillaire (1785). The features of this unit are given below:

1. The eggs are oval in shape and white with a yellow tint.
2. The pupa is placed in a hard cocoon of yellow-golden color. Placed in coniferous crust until departure time.
3. The larva is gray with a black head. There is a black stripe with white accents on the back. Its size can reach 25 mm. The general behavior is similar to that of the common sawfly.
4. The male reaches a length of about 7 mm, has a black color and feathery mustache.
5. The female is larger than the male (up to 9 mm). The color is completely red, the body is round in shape.

It is worth noting that females of the red pine sawfly are capable of producing offspring without the participation of a male. In this case, only male individuals appear.

What to do if there are caterpillars on rosehip leaves

If there are caterpillars on a rosehip, the first thing to do is to correctly identify the pest and carry out treatment against it. The following describes how to eliminate caterpillars on rosehip leaves if the plant is affected by a large number of lancets.

Maple shooter.

Maple shooter Acronicta aceris L. - a butterfly with grayish wings with a span of 35-45 mm. The caterpillar is up to 50 mm long, covered with large tufts of long yellow-red hairs located along the back in two rows. In the middle of the back there is a row of large diamond-shaped spots surrounded by a black border. The pupa is dark brown, in a cobweb cocoon. The caterpillars feed from June to September, damaging the leaves of maples and many hardwoods and shrubs. Occasionally found on rose hips.

Control measures. Collection and destruction of single caterpillars. In case of large numbers, spraying is carried out with one of the following drugs: fufanon, kemifos, actellik, kinmiks, spark, Inta-Vir.

Small shooter.

Small shooter Apatele strigosa Schiff. (syn. Acronicta strigosa F.) is a butterfly with violet-gray forewings. In the middle of the wings there is a yellow-gray spot with a black border on the inside. The hind wings are gray. The body is thick, wedge-shaped, the abdomen is narrowed towards the end, the thoracic part is covered with long dense hairs.

The caterpillars are green, with a uniform red-brown dorsal side and small light warts. The flight of butterflies is observed in July-August; after fertilization, females lay eggs on the leaves of trees and shrubs.

The caterpillars hatched from eggs feed and develop from July to October, roughly eating the leaf blades. Having finished feeding, the caterpillars go into the soil and pupate in earthen cradles. In addition to rose hips, the small shooter damages apple trees, plum trees, raspberries, buckthorns, and hawthorns.

Control measures. The same as against maple shooter.

Psi shooter.

Acronicta psi L. (syn. Apatele psi L.) is a butterfly with gray wings that have a span of 36-40 mm. The front wings have a brownish tint and black strokes at the base and on the outer field, the hind wings are gray-brown, darker at the edges. The caterpillar is black, up to 40 mm long, on the fourth segment it has a long, pointed bump, and on the eleventh segment there is a small tubercle, the back is light yellow, on the sides there are white-gray stripes with short red stripes, the leg line is white. The cone is covered with short black hairs, and the entire body is covered with sparse gray hairs. Butterflies fly in July-September, caterpillars feed on the leaves of fruit trees and shrubs, as well as deciduous trees.

Control measures. Collection and destruction of single caterpillars. In case of large numbers, spraying is carried out with one of the drugs: Fufanon, Kemifos, Kinmiks, Actellik, Inta-Vir, taking into account the waiting period.

How to treat roses against other pests

Orchid pests: treatment options and control of parasites

A danger to roses is posed by other insects that parasitize not only roses, but also nearby plants, bushes, and trees.

Spider mite

The most common rose pest. Leads to a general weakening of the flower. The leaves are falling. Immunity decreases. The plant becomes vulnerable to many infectious diseases.

Spider mites form large colonies

The peculiarity of the insect is the rapid change of generations and adaptation to toxic substances. It is necessary to treat the bushes every three days. You can use chemicals such as:

• Sunmite;
• Flumite;
• Apollo.

Thrips on roses

A sign of an insect attack is a grayish-brown coating on the foliage of roses. Thrips feed on cell sap. First, colorless spots appear. Then they increase in size. Holes appear from dead parts of foliage. The buds are deformable. They fall off prematurely without blooming. The pest is mobile, which is why it quickly moves from a diseased plant to a healthy one.

After infesting a bush, thrips leave sticky secretions on the plant.

Important! Thrips not only destroy the rose by drinking its juice. They are capable of transmitting viral diseases.

Shchitovka

The female scale insect is able to camouflage itself in the color of the foliage. It's difficult to notice. Just based on general characteristics:

• small red or brown inclusions;
• sooty coating;
• stops active plant growth.

It is recommended to constantly inspect the rose. Especially the back side of the leaves. When a sticky coating appears, you need to start treatment. There is no special means of combating scale insects. It is necessary to treat the foliage with a soap solution. The procedure is repeated after a few days.

Important! Spraying with a soap solution gets rid of not only scale insects, but also a number of other pests.

Leaf Cutter Bee

After being attacked by insects, perfectly smooth oval or round holes are left. The bee does not eat them, but makes a home for itself. The harm to the rose is minimal. Doesn't cause much damage. There is no need to use chemicals. Organic treatment from bees is sufficient.

Weevil

The weevil is a fairly large beetle, reaching a size of 10 mm. It is difficult to identify because the insect is nocturnal. Leads an active lifestyle at dusk. Adults eat leaves. The larvae destroy the root system of the rose, hiding in the thickness of the earth.

Barely noticeable weevils that lead a nocturnal lifestyle. In the morning, only eaten leaves remain

To get rid of weevils, it is recommended to use insecticides. Spraying is done in the evening. "Aktara" or "Inta-vir" are used.

Ants

The main danger ants pose is the spread and protection of aphids. To protect the vegetation in the garden, it is recommended to spray the soil near the rose with water with aromatic spices and essential oils. Pungent odors will repel insects, preventing them from harming the flowers. Prevention is an important condition for a healthy garden.

rose aphid

Aphids settle on roses in large colonies, mainly on the underside of leaves, stems of young shoots, buds and peduncles. The larvae, which emerge from the eggs in the spring, quickly develop into large wingless female founders, giving birth to about a hundred larvae. So, about 10 generations of aphids are born per season. At the end of summer, you can also see winged aphids that lay overwintering eggs.

Insects multiply quickly and suck the juice from the organs of young plants. As a result, the leaves curl and fall off, the shoots and buds become bent, and the flowers do not bloom.

Along with these pests, ants settle in the rose garden and feed on the juice secreted by aphids.