7 malicious pests of roses and how to deal with them

  • Apr 25, 2021
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There are a lot of pests that can damage roses. However, the dangers posed by them are different. We will list those from which the most harm, and indicate the measures to combat them.

A mite on the leaves of a rose. Illustration for this article is used under a standard license © ofazende.com
A mite on the leaves of a rose. Illustration for this article is used under a standard license © ofazende.com
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Spider mite

The first signs of damage to them are the appearance of pale yellowish spots on the leaves. Over time, they grow, turn pale, the leaf dries up and falls off. If you look closely, you can see thin cobwebs - they are produced by the same mite.

It is difficult to see him himself: his dimensions are less than a millimeter. But when there are many of them, tiny whitish lumps of cobwebs appear on the leaves.

The mite is especially active in dry air, so greenhouse or indoor roses suffer most from it.

What to do:

  1. Do not let the roses dry out, water the leaves and branches with water during a drought.
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  3. Remove the affected parts of the plant, collect visible mites with a wet cloth.
  4. If prevention did not help, use drugs with acaricidal properties (Fitoverm and analogues).

Rose leaf roll

Caterpillars of this insect hatch from eggs in leaves rolled into a tube. First, they all gobble up the leaf on which they hatched, and then they spread out and begin to gnaw everything. A characteristic sign of a rose lesion is curled or gnawed leaves. Leafworms are rampant for about 30-40 days, then butterflies are already emerging from the caterpillars.

Leaf roll. Illustration for this article is used under a standard license © ofazende.com

How to fight:

  1. Do not leave plant residues in the garden.
  2. We saw a twisted piece of paper - cut and burn it.
  3. Use caterpillar traps.
  4. Before the leaves appear, treat the roses with Karbofos or another similar insecticide.
  5. When the buds open, apply biologics.

Thrips

Small black insects no more than 2 mm long. They devour flowers, buds, buds. They are usually active during hot and dry times.

It is difficult to deduce them, but you can:

  1. The larvae are not very susceptible to drugs, therefore, for prevention, deeply loosen the soil in the fall and do not leave dead leaves under the roots of the roses.
  2. During drought, spray roses with water from a sprayer.
  3. Cut off all affected flowers and treat the plants with an Inta-Vira insecticide.
  4. Alternate between different types of insecticides: These pests adapt very well to survive after applying the chemicals.

Shields

You can find them by sticky streaks on the stems and leaves. Later, the fungus usually settles there. When the scale insects mature, they can be seen with the naked eye - like small dense formations on stems and leaves. These are the pests themselves under the shell, which, unfortunately, protects them from most insecticides.

Pests of roses. Illustration for this article is used under a standard license © ofazende.com

What to do:

  1. Examine roses, wash off pests and traces of their nectar with soapy water.
  2. Spray the colonies of scale insects with soapy water, to which you should add 5-6 drops of petroleum products (kerosene, oil) per liter of water. This mixture will cover the pests and suffocate them.
  3. Before covering the roses for the winter, wash off any scabbards you find.

Rose aphid

They multiply rapidly, up to 7-10 clutches are hatched over the summer. Aphids suck the juice from leaves and young stems, the rose loses strength and withers. What is really bad, black garden ants live in symbiosis with aphids: they transfer aphids to new plants in order to feed on the sweet secretions of these insects.

How to fight:

  1. Treat roses with Karbofos or another insecticide in early spring to kill wintering clutches before hatching.
  2. In late spring and summer use "Fufanon" or "Aktaru" every 3 days. Usually 2-3 cycles are enough.
  3. Don't touch the ladybirds - they eat aphids. It is a pity that the cows cannot be bred.

Rosaceous sawfly

Hibernates at the roots of roses. The larvae, hatching in the second half of spring, slowly devour all parts of the plant. Having gained strength and reaching maturity, the larvae go down to pupate in the soil.

The sawfly attacks the plant in two ways:

  • ascending, when leaving wintering - rises from the roots and eats leaves, leaving only veins;
  • descending, going to pupate - gnaws through the passages in the shoots, because of which the plant darkens and withers.

How to fight:

  1. Cut and burn affected shoots.
  2. Loosen the soil before wintering to expose the pests to frost.
  3. Treat the soil with hexachlorane during pupation.
  4. Treat the flowerbed with "Inta-Vir" or a similar preparation.
Pests of roses. Illustration for this article is used under a standard license © ofazende.com

Penny slobber

A characteristic feature is foamy discharge on the leaves, in which the larvae hide. Like other pests, bibs feed on juice, weakening the rose. How to fight:

  1. Remove foam with larvae with a damp cloth.
  2. If there are many pests, rinse the roses with a stream of water and treat them with Karbofos or another insecticide.
  3. Follow the agricultural standards for roses: plant them in sunny places (the slobber prefers shade) and water sparingly (this pest loves dampness).
  4. If wasps have settled in the garden, do not touch them: they eat slobber.

Do you know how to get rid of the malicious pests of roses?

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