Bacterial and viral diseases

August 12, 2017 17:51 | Diseases And Pests

How sad to admit, really highly effective means of combating these diseases are not present.This does not mean that the attempt to confront them is not necessary.Even if the plant is not always recover completely, you will likely be able to prevent his death.

wet bacterial rot.Like many other colors diseases in the early stages of the first soft rot symptom of infection is yellowing of leaves.It begins from their tops, then it moves to the edges, and then there are more specific symptoms: spots of purple and dark blue-gray color on the leaves.The flowers wither and fall off.Strongly affected tubers: in the early stages of the disease, they may look outwardly healthy, but soon they become lethargic and secrete a yellowish-brownish slime.

Mosaic.This disease caused by a virus usually manifests itself in the flowering period.Its main symptom, which gave the name of the disease is the appearance on the leaves of crisp monochrome patches of various shapes (sometimes coalescing into rings) lighter color.Then

diversity is enhanced: the leaves fade and turn yellow, may appear necrotic spots on the petals of flowers also appear, usually elongated, even shtrihoobraznye spots, not peculiar to the natural coloring of the variety.In more severe forms deformed flowers, seeds, they are not formed.Sometimes there is a rosette and a shortening of the internodes.All this is accompanied by a general inhibition of the plant.

Mosaic plants can infect aphids.

effective methods of struggle there.

Jaundice.jaundice virus is carried by some small insects.Significantly different course of disease in adult plants and seedlings: if the plant was infected shortly before flowering, except for the tips of the leaves yellowing, trouble can not be expected at an earlier infection may delay the development of stems.And in fact, and in another case, if the plant is bulbous or tuberous, despite the outwardly healthy appearance of underground parts of healthy normal plant get from them will not be able to next year.

Infection jaundice during regrowth usually ends with the death of the plant.Hlorotichnye8 in appearance, frail seedlings do not form stems and quickly dry up.

The "intermediate" cases (quite young plant), in addition to the symptoms of chlorosis, delayed the overall growth, branching is often worse, but the inflorescence or flower stalks remain underdeveloped.

bacterial scab.Heat and moisture contribute to the proliferation of pathogens of bacterial scab.When the disease is the disease on the leaves (often at their base) there are small specks of reddish color, which, if no action is taken, can become like stains burns (round or oval) dark - brown to black - color, and the upper part of the attenuatedleaf begin to turn yellow.When moisture can develop in these areas wet rot, to the extent that the rotten stem fractures at the base.At lower humidity the disease progresses slowly, and the affected tissue will be firm to the touch.If hit by a bulbous plant in the bulbs can also find pockets of infection - they covered with sores from the dried peel of black color with a raised edge.Sores can take a significant portion of the surface, but deep, as a rule, do not apply.

good therapeutic and prophylactic agent for acidophilus (kislotolyubivyh) plant is the acidification of the soil: scab pathogens prefer slightly alkaline environment.

Pestrolepestnost.This disease is typical for tulips and related species.Moved it also sucking pests.Symptoms similar to occur in diseases of mosaic, but another manifestation of the external signs of the disease, as it were reversed: the first spot-stripes appear on the petals, turning sometimes monotonously painted in colorful variety, and only then appear pale oblong pas leaves stains.Flowers shallow, distorted, plant weakens.

root bacterial cancer.Cancer of the roots of plants has nothing to do with the terrible disease of warm-blooded animals and humans, and his name he got because of the fact that the most typical manifestation of the disease is the formation on the roots of plants-tumor growths.The causative agent of this disease is not completely species-specific: its victims may be the representatives of all plant families.

bush.In crop and horticulture literature is not always clear what is referred to: Female (ie, shortening of internodes, leaves convergence) is often a symptom of a pathology caused by the not always even viruses or bacteria.But some experts rosette stands out as a separate disease, rather, it is sometimes the only visible sign of the laboratory analysis without viral disease.If the changes in supply and irrigation regimes do not change the appearance of plants, and similar symptoms occur in neighboring plants - no doubt remains, that is exactly rosette virus.

dwarfism.Infectious dwarfism as rosette, calculated by exclusion of other causes.First - the food and moisture, and then - the use of funds against pests - nematodes.