Diseases and Pests of Rudbeckia and Their Control

Diseases and their control of Rudbeckia

Botrytis cinerea

Gray mold is one of the common diseases of Rudbeckia radiata, which mainly harms the leaves and stems of the plant, causing them to appear spots or rot.

Gray mold disease usually occurs when the humidity is high. The fungal spores multiply and infect the blackheart chrysanthemum, causing lesions. A major factor causing gray mold disease in black chrysanthemum is the environment, so management needs to be strengthened, watering and fertilizing should be done reasonably, and attention should be paid to ventilation, timely drainage during the rainy season, and hygiene should be maintained. When gray mold occurs on black heart chrysanthemum, it is necessary to spray pesticides in time for treatment.

Mosaic

When black chrysanthemum suffers from mosaic disease, spots or mosaics will appear on the leaves, and the leaves will become smaller and deformed.

Mosaic disease is mainly caused by viruses and can be spread by insects. When planting black chrysanthemum, you need to choose healthy and disease-free plants. To prevent mosaic disease, you need to control pests and spray some pesticides.

Root rot

Root rot is a common plant disease, and blackthorn sometimes also suffers from this disease, mostly because of too much water, waterlogging in the soil, poor drainage, and poor ventilation. To prevent and control root rot, pay attention to proper watering and keep the growing environment ventilated. If root rot occurs, it needs to be treated in time.

Pests of Rudbeckia serrata and their control

Pests of Rudbeckia

The main pest of blackthorn is aphids, which will occur when aphids are prevalent. Aphids are very harmful. Not only can they cause lesions on the leaves of Rudbeckia and even the entire plant, but they can also lead to diseases such as mosaic disease.

Aphid control

Aphids are difficult to control and need to be treated promptly once they are discovered. Mainly rely on manual capture, make some safe pesticides to kill insects, and pay attention to keeping the environment ventilated.