Raspberry diseases and their control is a very broad topic. In this article, we will consider only some of the existing diseases.
Rust is a very common fungal disease that affects raspberry fruits and leaves. In spring, yellowish pads may appear on top of the leaves, and in summer, black, dark and light orange raised spots cover the underside of the leaves. With a sufficiently strong defeat, the leaves shrivel and fall off, the raspberry yield drops. If the humidity is high, then the disease may drag on until late autumn.
Ways to fight: thickening of beds should not be allowed, raspberry shoots that bear fruit should be cut off immediately. In autumn and spring, the soil must be dug up, the remains of raspberries affected by rust must be removed and destroyed.
Raspberry anthracnose is another very common fungal disease. The disease develops in spring and can last until autumn. Concave purple spots form on the affected shoots, then they turn gray. The affected bark thickens and acquires a brown tint. The berries become covered with ulcers and dry up. The methods of struggle are the same as with the defeat of raspberries with rust.
In general, raspberry diseases and the fight against them inmost of the time they are very similar. For example, white spot is another widespread type of raspberry fungal disease. It also affects the leaves and berries of raspberries. Brownish spots appear on the leaves in early spring, which then brighten and turn white. The disease reaches its peak during fruit ripening. Bushes affected by white spotting do not bear fruit well. Control methods are the same as for rust and raspberry anthracnose.
But there are also other raspberry diseases. And the fight against them is also completely different. For example, the viral disease chlorosis affects biennial stems and leaves. At the initial stage, the leaves along the veins turn yellow, over time, the yellowness spreads to the entire leaf. The berries dry up. The virus remains in the shoots, is transferred from diseased bushes to he althy ones through insects.
The fight involves careful selection of material for planting (plants with signs of disease are removed), loosening and fertilizing the soil, spraying bushes from sucking insects. You should not plant a new raspberry plantation immediately after removing the infected one. Once every two years, compost, humus, peat must be applied to the soil.
Raspberry root cancer is a bacterial disease that penetrates the root system through damage caused by earthen pests. Growths form on the roots of raspberry bushes. Struggle: introduction of phosphorus-potassium fertilizers, manure into the soil, timely watering and loosening of the earth. The roots of raspberry seedlings can be disinfected within fiveminutes in a solution of copper sulfate, then rinse them in a solution of boric acid (0.2%). As you can see, raspberry diseases and the fight against them are a complex process that requires a lot of time and physical costs. As mentioned above, raspberry diseases, photos of which you can see in this article, are a fairly extensive topic. And it is not possible to cover it entirely in this material.
Raspberry pests and their control
The most common raspberry pest
is the raspberry beetle. He lays his eggs in flowers, and later on the tops of the ovaries. The hatched larvae penetrate the fetus and destroy it. For wintering, beetles and larvae go into the soil to a depth of 8 centimeters. Fight: during the growing season, the soil must be loosened by adding tobacco dust and wood ash to it. Just before flowering, treat raspberries with Iskra or Phosbecid.
There are also little black bugs called strawberry-raspberry weevils. In winter, they hide under fallen leaves and in the soil. These beetles are very voracious, they eat young leaves, after which they dry up and fall off. They lay their eggs in buds. Fight: during the flowering period, raspberries should be sprayed with Iskra, and after harvesting, treated with Phosbecid.
