Of the most dangerous diseases and pests gooseberry (Grossularia) first of all, powdery mildew, verticillous wilting, columnar rust, septorioznuyu and white spotting, niello, post-aphid aphid, sawn fish and fireballs should be identified.
With a description, photos and ways to combat gooseberry disease and insects that damage shrubs, you can read by reading this material.
Gooseberry disease and how to deal with them
The causative agent is a mushroom Verticillium dahliae. Plant root system is affected. When this disease stops the access of nutrients to growing shoots, the leaves quickly fade, and the bushes suddenly dry up. On the roots, as well as on sections of branches, leaf veins with an abundance of moisture, a white fluffy mycelium develops.
Control measures. Remove damaged leaves and branches, burn the affected bushes with the roots. For the treatment of gooseberry from this disease, you can spray and water the plants under the root 0,2% solution of basezol.
The causative agent is the Sphaerotheca morsuvae mushroom. The description of this gooseberry disease is known to all gardeners: on young shoots and leaves at the beginning of summer, separate patches of white spiderweed plaque appear.
Over time, the mycelium expands, compacted, becomes gray. Leaves remain underdeveloped and dry prematurely, young shoots are severely deformed. The berries are covered with white bloom and gradually dry out.
Ways of struggle. Collect the plant residues, cut off the affected tops of the shoots. Apply phosphate and potash fertilizers. An effective method of treating a kondovnik from this disease is spraying the bushes at the first signs of the disease with Tiovit Jet and Skor. In the early spring, before bud breaks or in the fall after foliage fall, spray the bushes and soil with 3% green sulphate.
Septoria, or white spot gooseberry
The causative agent is a mushroom Septoria ribis. The spots on the leaves are small, brown in color with a red-brown border, gradually lightening in the center. Leaves fall prematurely. Constantly found, and other spotting - brown, anthracnose, phyllostiktosnaya, etc.
Ways of struggle. Collect plant residues. To combat this gooseberry disease, spray 1 shrubs with a Bordeaux blend or its substitutes before flowering, immediately after flowering or after picking berries.
The causative agent is a mushroom Cronartium ribicola f. grossularia. It winters on Siberian cedar or on the Weymouth pine, and in the spring the fungus spores infect the berries. By the middle of summer, yellow, brown spots appear on the leaves, on the underside of which bright orange sporulation develops. The leaves wither and fall prematurely.
Control measures. Spray the bushes Bordeaux mixture immediately after flowering and after picking berries.
Pathogen - saprotrophic fungus Fumago vagans. Young leaves and petioles are covered with black soot film. The fungus develops on the surface of the leaf blade, most often on sugary aphid secretions. The process of photosynthesis and ornamental plants is reduced.
Control measures. Spray, especially at the beginning of summer, gooseberry bushes and the nearest plants from aphids fufanon, aktellik. Raid wash off with water and spray gooseberry Bordeaux mixture before flowering and immediately after it.
Drugs to combat viruses do not exist. Infected plants are removed and burned. To prevent such diseases, it is necessary to acquire healthy planting material, as well as to prevent the spread of insect pests that transmit viral infections.
Next, you will learn how to treat the gooseberry from pests.
What can be processed gooseberry pests (with photos)
Gooseberry fleecy aphids
Gooseberry Shoot Aphid (Aphis grossulariae) - small sucking pale green insect. Already in April, the larvae hatch and feed on sap of buds. Then they settle on young leaves and shoots, develop into adult insects, the females of which give rise to new generations. The leaves are twisted and deformed, the young shoots are bent.
Control measures. For the treatment of gooseberries from these pests need to spray the bushes during the blooming of the buds and the growth of leaves with one of the following preparations: fufanon, actellic, spark, Inta-Vir.
Yellow gooseberry sawfly
Yellow gooseberry sawfly (Nematus ribesii) -insect yellow with black head and transparent wings. Larvae - gray-green caterpillars have 20 legs, the head and the warts on the body are black, shiny.
As shown in the photo, the females of this gooseberry pest lay eggs on the underside of the leaves:
The larvae at the younger age skeleton leaves, in the older - eats holes and eat the leaves completely, leaving only the veins. Second-generation pests usually develop in the second half of June and destroy not only the leaves, but also the berries.
Control measures. Spray the bushes when the larvae appear; one of the drugs: fufanon, karbofos, aktellik, spark.
Gooseberry moth is a butterfly of the family of moths, a dangerous pest of gooseberries and currants. The female lays eggs inside the flower. Hatching caterpillars bite into the formed ovary and feed on seeds.
During its development, one caterpillar can damage up to 15 red currant berries. Crawling from berry to berry, she entangles them with cobwebs. Damaged berries are prematurely stained.
To fight with this gooseberry pest it is necessary to collect damaged hands. Mulching the soil around the bushes makes it difficult for overwintering pests. Conduct processing before and after flowering with the same preparations that are used on trees from caterpillars.