Throughout the growing season, garden flowers are susceptible to various diseases. So, gladiolus diseases can occur from spring to autumn. How to determine the type of lesion and choose a method of treatment? The most famous diseases of gladioli are botrythiosis, dry rot, septoria, fusarium, penicillosis rot, mosaic, scab, gladiolus thrips. The following are signs of the diseases of this plant and methods for their treatment.
Gladiolus diseases can affect all parts of this flower. They can appear on corms, stems, leaves and flowers. So, fusarium infection first affects the tubers and corms. Darkened areas appear on them. With a longitudinal section, black vessels can be seen. Affected bulbs sprout poorly. In such plants, the leaves turn yellow, and the roots die off. It is best to burn the plants affected by Fusarium infection.
Gladiolus diseases such as septoria, dry and penicillic rot, botritiosis also affect all their parts. Spots of different sizes and shades appear on the leaves. Signs of the disease are noticeable on the corms. All fungal lesions most often occur in rainy weather or when planting is too thick. Diseases of gladioli can also occur with the abuse of organic and nitrogen fertilizers, as well as with improper drying of the bulbs after digging them. Often they are transmitted through contaminated soil.
Diseases of gladioli, the treatment of which is justified only with minor lesions, are very contagious. Treatment of plants begins with spraying flowers with 0.5%
copper chloride and a copper-soap preparation (200 g of laundry soap and 2 g of
copper sulfate are taken per 10 l of water
) throughout the growing season. Planting material is processed with 0.2% baseazole. Vaults and containers in which corms are stored are treated with 4% formalin and 5% copper sulphate. Plants with significant lesions must be dug up and burned.
There are lesser known diseases of gladioluses. The treatment (photo on the right) of the plant affected by the mosaic does not give any result. This viral disease is caused by cucumber or bean mosaic. In this case, light green stripes and specks of different sizes appear on the leaves. On the flowers of gladiolus manifests itself petrochemical. Diseased plants must be dug up and burned.
The scab of gladioli is caused by bacteria that infect corms. Dark ulcers with a shiny surface appear on them. Measures to combat this disease are the same as in the case of Septoria and rot.
Gladiolus diseases are not always triggered by viruses and bacteria. Very often this flower is affected by small insects of a dark brown color. They are called gladiolus thrips. If the temperature of the corm is higher than 10 ° C, they can be affected by these insects. From their bites, corms acquire a burn, rough surface. During the growing season, thrips accumulate on the flower arrow. So they damage the flowers. The main sign of thrips is twisting buds. Methods of control: before planting, corms are etched with 0.2% foundationazole mixed with 0.2% karbofos. Throughout the growing season (especially during the flowering period), plants are regularly treated with 0.2% malathion. The frequency of spraying is every 10-14 days.