2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Rose leafhopper is literally omnipresent pest. Equally, it damages almost all fruit trees, as well as bird cherry, strawberries with raspberries, delicate roses and some other crops. In this case, the main food item for these pests is the dog rose. The reborn larvae, together with the adults, actively pierce the vulnerable epidermis on the lower sides of the leaves, after which the enzymes of their own saliva are injected into the tissues and begin to suck out the juices. And on the upper sides of the leaves attacked by these pests, you can notice vague and rather pale specks, giving the leaf surfaces a marbled appearance (especially for the edges of the leaves). As a result, the leaves dry out noticeably and quickly curl
Meet the pest
The adults of rosaceous leafhoppers reach sizes from 3 to 3.5 mm. All individuals are endowed with a slender narrow body and pale yellow elytra with a pleasant pearlescent greenish sheen. The length of the elytra usually exceeds the length of the abdomen. The antennae of rose leafhoppers are bristle-shaped and rather long, and the eyes are dark and convex. Their chairs in the front are rather widely rounded. The scutes, as well as the pronotum, are slightly darker than the wings, and the hind tetrahedral tibiae of harmful parasites are equipped with numerous spines.
White spider-like eggs of voracious scoundrels are characterized by translucency and slightly curved. And the larvae of the fourth and fifth centuries are painted in yellowish-whitish shades and are distinguished by well-developed wing caps. In addition, they are incredibly mobile and jump well.
Eggs usually overwinter in the bark of young shoots of rose and rose hips. At the same time, they are concentrated mainly at the bases of the buds and forks of branches. And a relatively small part of pests can overwinter on pears with apple trees and other rosaceous plants.
The revival of larvae starts, as a rule, during the budding period. This happens approximately at the end of April or at the beginning of May. The development of the first generation takes from twenty five to thirty days. For ten to fifteen days, winged individuals migrate to numerous berry and fruit plantings from roses and rose hips. By the way, only one spring generation almost always develops on roses with rose hips. And females of summer generations lay eggs in the lateral and middle veins on the lower sides of the leaves of a wide variety of crops. The total fertility of females is up to fifty eggs. At the same time, each larva passes in its development for five whole centuries.
Trees heavily affected by rose leafhoppers give very little growth, and their frost resistance decreases sharply. The fruits are noticeably decreasing in size, and there is also a fairly decent decrease in yield.
As a rule, from two to three generations of rose leafhoppers can develop in one season. In this case, adults can be observed until frost is established. Approximately in September and October, leafhoppers return to a rose with a rose hip, where females cut the bark in a horseshoe shape with the help of ovipositor and lay one egg in the holes formed. It is quite simple to detect such areas of the bark - the bark in the places of egg-laying darkens and deflates.
How to fight
When laying out berry fields and orchards, it is important to take care that there are no rose hips nearby. And to create unfavorable and completely unsuitable conditions for the wintering of gluttonous parasites, high-quality autumn tillage of the soil in the aisles and in the near-trunk circles will certainly help.
If it was possible to identify one or two cells inhabited by rose leafhoppers on the trees, spraying with suitable insecticides is carried out.
There are many rosaceous leafhoppers and natural enemies - numerous predators and parasites contribute to a significant reduction in their number. And in rainy and rather cool years, harmful parasites die en masse from various ailments.
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