Diseases of petunias
Viral diseases of flower are apparent in the bleaching of leaves, yellowing of leaf veins, slowing the growth of plants. Carriers of the virus in most cases are aphids. Measures in the fight against disease involves removing diseased plants.
When the chaff on the stems of plants appear bright fleshy growths. Health petunias they have virtually no effect. However, they should be removed. In addition, when selecting plants, avoid the affected options. For the prevention of bacteriosis can be used such drugs as "Albite", "Binorm", "Planes", etc.
In this disease, as powdery mildew on both sides of the leaves of plants appear white powdery coating. Marvel at the flowers. Tissue petunias bloom under acquire a brownish color. When purchasing a plant, you should give preference to varieties that are resistant to powdery mildew. With a weak failure is to use biological fungicides "fitosporin-M" and "Alien-B", with a strong – drugs "Topaz", "Chistotsvet", "Strobi".
Gray mold affects the tissues of plants, which become watery and soft. The appearance of grey color contributes to the high humidity. Prevention of this problem is to keep the plants in relatively dry conditions.
Fitoftoroza rot affects the base of the stem, which becomes black-brown and as rotting the stem begins to droop over the edge of the pot. In most cases, this problem affects adults petunias. Control measures consist in the destruction of diseased plants, the processing of other drugs, Alet" and "Ridomil gold, reduce watering to a minimum.
Pests of petunias
In the presence of thrips, deformation of young leaves, and the curvature in terms of growth. The flowers appear spots, and the petals turn brown at the edges. Reproduction of thrips occurs in the flowers. To prevent this problem, apply adhesive traps. This is especially important in the case of young plants, as they can harm even a single insect. To completely get rid of pests, you need early and repeated application of insecticides (Akhtar", "Biotin", "Konfidor", etc.). After 4-5 days after the initial treatment, should re-spraying because the drugs are unable to provide the necessary impact on all stages of development of insects.
The appearance of aphids helps to ensure that the leaves, buds and flowers begin to marchwitza, yellow. When severe lesions on plants visible adhesive selection insects. With a weak defeat, or in the case of a single plant, pest control is washing with water with soap and water. In other cases, it is advisable to use drugs such as Anticline", "Actellic", "Akhtar", etc.
Slugs and snails first eat the leaves of the Petunia boxes and grooves, and then pass through them. In the case of individual plants, snails, just collect, and if a lot of them use mechanical traps, dolomite flour or metaldehyde.
The emergence of the caterpillars on the leaves and petals of plants appear vygryzennymi areas, sometimes you can see the dark droppings insects. Pests can be picked by hand, and it is possible to process biological and chemical insecticides.
Miners leave on leaves small yellow punctures, and then the light moves. Their pupae are initially on the leaves and later fall to the ground. When buying seedlings, it is important to carefully examine plants for presence of pests. Affected petunias should be removed at once, so chrysalis did not have time to turn into insects. In addition, in the fight against these pests, you can use the "Actellic", "Malathion" and "Fufanon".