The petunia is extremely unpretentious flower. However, at non-compliance with elementary conditions of its contents, even it can be subject to some diseases and wreckers.
Petunia diseases
Viral diseases of flower are shown in the form of decolorization of leaves, yellowing of sheet veins, delay of growth of plant. Carriers of virus in most cases are plant louses. Measures of fight against illness consist sick plants at a distance.
At bacteriosis on stalks of plant fleshy light outgrowths appear. They practically do not affect health of petunia. Nevertheless, they should be deleted. Besides, when choosing plant, it is necessary to avoid the struck options. For prevention of bacteriosis it is possible to use such medicines as "Albite", Binoram, Planriz, etc.
At such disease as mealy dew, on both sides of leaves of plant the white mealy raid appears. Also flowers are surprised at the same time. Petunia fabrics under raid get brownish coloring. Buying plant, it is necessary to give preference to the grades resistant to mealy dew. At weak defeat it is possible to use biological fungicides "Fitosporin-M" and "Alirin-B", at strong – the medicines "Topaz", "Chistotsvet", "Strobi". Gray decay strikes plant fabrics which become watery and soft. Formation of gray raid is promoted by high air humidity. Prevention of this problem consists in the maintenance of plant in rather dry conditions. Fitoftorozny decay strikes the stalk basis which becomes black-brown and in process of rotting the stalk begins to hang down too much pot. In most cases this problem mentions adult petunias. Measures of fight consist in destruction of sick plants, processing of the others with the medicines "Alyet" and "Ridomil Gold", reduction of watering to minimum.
Wreckers of petunia
In the presence of trips there is deformation of young leaflets and curvature of point of growth. On flowers there are spots, and lobes at the edges grow brown. Reproduction of trips happens in flowers. Sticky traps are applied to prevention of this misfortune. Especially it is important in case of young plants as can do them harm, even single insects. Completely to get rid of wreckers, early and numerous application of insecticides is necessary (Aktara, Biotlin, Konfidor, etc.). 4-5 days later after primary treatment, it is necessary to carry out repeated spraying as medicines cannot make necessary impact on all stages of development of insects. Appearance of plant louses promotes that leaves, buds and flowers begin to kurchavitsya, turn yellow. At strong defeats on plants sticky allocations of insects are visible. At weak defeat or in case of single plants, pest control consists in their washing off by water with soap solution. In other cases it is reasonable to use such medicines as Antitlin, Aktellik, Aktara, etc. Slugs and snails at first eat away windows and grooves on petunia leaves, and then eat them through. In case of single plants, snails are just brought together if them much – mechanical traps, dolomitic use flour or metaldehyde. As a result of emergence of caterpillars on leaves and lobes of plants there are gnawed sites, dark excrements of insects sometimes are visible. Wreckers can be brought together manually, and it is possible to process biological and chemical insecticides. Miners leave small yellowish punctures, and then and the light courses on leaves. Their dolls initially lie on leaves, and later fall to the ground. Upon purchase of seedling it is important to examine carefully plants on presence of wreckers. The struck petunias should be deleted at once that dolls have not managed to turn into insects. Besides, in fight against these wreckers it is possible to use Aktellik, "Carbophos" and Fufanon.