Diseases of asters and control measures
Like many other plants, the Aster is also characteristic of Contracting diseases.
Diseases the typical ordinary colors. Most often it is fungal or viral, there are about 24 varieties.
The presence of the disease of asters can be seen on the leaves or flowers, and this in turn negatively affects the quality of the products.
In the preventive purposes it is recommended to buy healthy specimens, and to select varieties resistant to viral diseases.
In addition, you should regularly inspect plants and, if necessary, to implement measures for decontamination.
Damaged flowers should be culled. The most common jaundice – mosaic disease and Fusarium.
Fusarium. This is a very dangerous disease, which the agent is a fungus. It can be stored in the ground for many years, so the plant is infected through the soil.
Mushroom spores getting to the roots of flowers and infect the vascular system, whereby it is sealed. The disease begins to manifest itself at the stage of budding and flowering in the form of wilting.
Young asters, too, can become infected with Fusarium, but this occurs under certain favorable conditions the fungus. First, the leaves begin to turn yellow, then turns brown, curl and fade.
On the stem spots appear brown in color, and root of the neck are dark equity strip. Also cracks can form. The plant stops growing, becomes beautiful and fade.
For fuzeiros favorable conditions are humidity and temperature from +20° to +27°. If the temperature is above + 32° and below +12°, then the disease ceases to spread, but until then, until the conditions again become suitable. While visible signs can not be overlooked.
Methods of struggle
Asters can be returned to its original place only five years later. It is important to rot seeds before planting. For this purpose, fundazol 0.2% and topsin of 0.1%. Seeds incubated in the solution for half an hour.
The ground for landing of flowers should be acidic. Affected plants must be destroyed, and the area to process quicklime.
Jaundice. Carriers of the virus are cicadas and aphids. The leaves turn yellow, the plant is growing strongly, and the buds turn green and stop growing.
Cicadas and aphids need to destroy with the help of infusion of yarrow and its broth. Dry leaves in an amount of 800 g pour 10 liters of hot water, boil for about 2 hours, then add water to the original volume, filtered and allowed to cool. Infected plants need to burn.
The infusion is prepared with the same amount of ingredients, pour boiling water, but insist two days.
Rust. The fungus spores carried by the wind. Distances do not matter. Disease of asters is easy to identify the swollen spots on the leaves. As a result, they wither and fall off.
Aster sprayed with liquid Bordeaux 1% once a week or with a solution of lime and sulphur 1 to 1.