Diseases and prevention methods of Gloxinia

Diseases of Gloxinia: blight nematode disease

symptom

Blight nematode disease is a common disease of Gloxinia, which is caused by nematode infection.

It will harm the tender stems, young plants, surface stems and bases of branches and leaves of Gloxinia, causing the plants to soften and rot like they are soaked in water, and then gradually extend to the leaves, causing them to shrink and die.

Prevention and treatment methods

Before cultivation, the potting soil should be disinfected with steam or chloropicrin, and the tubers of Gloxinia should be soaked in warm water at 60°C for 5 minutes, or disinfected with Uspron.

If you find that Gloxinia has been infected with this disease, you must pull out the affected plants and burn them.

Diseases of Gloxinia: Rot

symptom

It mainly harms the leaves, stems and young plants of Gloxinia, producing water-soaked dark brown necrotic spots on the leaves with ring patterns in the spots. In severe cases, the upper stems will become twisted and dwarfed.

Mature plants will develop a large number of black sunken spots on the surface of the stems, which will crack open. The small black dots on the spots are arranged in a ring pattern with white hyphae on the edges.

Prevention and treatment methods

Before cultivating Gloxinia, spray the ground surface with 3 parts formaldehyde mixed with 1 part water and cover it with a film, or mix 7 parts 70% dichlorodiphenyltrichloroethane powder with 3 parts fine soil and sprinkle it on the ground for disinfection.

In daily maintenance, pay attention to promptly removing diseased plants and burning them in time.

Diseases of Gloxinia: Botrytis cinerea

symptom

It is the main disease of African violet, which manifests as brown soft rot on the pedicels. Brown spots grow from the edges, and the surface has wrinkles and rings, which will spread to the entire leaf.

When damp, a gray mold layer forms, which later turns yellow. In severe cases, the entire leaves, flowers and branches will turn brown and die.

Prevention and treatment methods

During the disease period, use 500 times diluted 80% Mancozeb, or 1% Bordeaux mixture, or 500 times diluted 75% Benomyl, spray once every 10 days, and spray 2-3 times in a row.

Diseases of Gloxinia: blight

symptom

When the leaves are infected, they will become dark brown and softened like water stains. After spreading to the petioles, the leaves will rot and have narrow, sunken spots like water stains, which often expand into large patches or long strips. The disease in the stems will also spread to the petioles, causing the leaves to bend.

Prevention and treatment methods

At the early stage of the disease, spray 600 times diluted 72.2% Prolike aqueous solution or 600 times diluted 72% Kelu wettable powder, 1000 times diluted 60% Fluazifop (Fluoromac, Mancozeb) wettable powder, 500 times diluted 25% Metalaxyl wettable powder.