2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Raspberries are one of the most beloved berry crops. In order for the harvest of fragrant berries to please from year to year, it is important to try to protect it from evil pests, of which raspberries have a lot. Who is most often harmful to this wonderful culture? It's time to take a closer look at the most common pests
Raspberry mite
These pests simply love to feast on juicy raspberries! Adult insects overwinter under the kidney scales, and as soon as the buds begin to bloom, the gluttonous parasites immediately move into them. And subsequently, the raspberry mite concentrates mainly on the lower sides of the leaves. By the way, it will not be difficult to find such leaves - on top they are covered with oily specks of pale green shades. And towards the end of August, when the thermometer drops to eleven degrees and below, harmful insects lose their mobility and go to winter.
Strawberry-raspberry weevil
Outwardly, strawberry-raspberry weevils are grayish-black bugs, distinguished by truly incredible gluttony. Most often, young leaves suffer from their invasions. In addition, harmful weevils often gnaw the flower stalks - as a result of such actions of pests, the flowers instantly darken and quickly fall off.
Females of strawberry-raspberry weevils lay eggs in buds, and some time later hungry larvae appear from them, which immediately begin to eat away parts of flowers and pupate there a little later. Finding "nests" with larvae is not at all difficult - breaking the drying buds, you can see tiny white larvae, endowed with yellowish heads and devoid of legs. Approximately in the second decade of July, pupal larvae are transformed into young bugs, which begin to actively damage the leaves. And for the winter, they hide under soil lumps or under fallen leaves.
Raspberry stem gall midge
During the period of mass flowering of berry bushes, the most active years of these evil creatures can be observed. Females lay eight to fifteen eggs in the lower parts of young shoots, from which rather colorful orange-yellow caterpillars subsequently hatch. And after about three to four weeks, characteristic swellings are formed on the shoots attacked by harmful parasites, in which the pests will winter. So if, in the fall, such swellings were found on the raspberry bushes - most likely, these are the tricks of the raspberry stem gall midge.
Raspberry shoot gall midge
This scoundrel is very harmful, because she is capable of giving two or three generations per season. And if the raspberry shoot gall midge spreads over the site too quickly, you can not wait for the harvest at all - the stems damaged by these pests either break or dry out after wintering. To detect these parasites, in places where the bark is cracked on young shoots, the edges should be pulled back - as a rule, all the larvae are located under them. And when purchasing raspberry seedlings, it is important to examine them in the same way for the presence of pests, otherwise it is possible that a voracious gall midge may appear in the raspberry tree.
The larvae of harmful parasites overwinter near the base of the shoots in the upper soil layer, and already in the second half of May, the first years of the pests can be observed. Females begin to lay eggs, placing them under the bark of young shoots (in cracks, wounds, cuts and scuffs). And about a week later, whitish larvae will appear from the eggs, changing their color first to pink and then to orange as they grow. After another couple of weeks, all the larvae go to the soil and pupate there near the bases of the berry bushes. And three weeks after pupation, pests of a new generation fly out and again begin to lay eggs.
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