Powdery mildew is a common disease of Delphinium, which can damage the leaves and stems of plants. In general, turquoise infected with powdery mildew, the plant will appear lesions, with white powdery mildew, if the disease is serious, the branches and leaves will curl, the mildew will turn black, is the growth of the plant is inhibited.
In general, powdery mildew is caused by fungi, which will germinate and produce spores after overwintering. Spores can be transmitted by wind and rain, which will harm the plants of Delphinium. In general, powdery mildew is easy to occur in cold season. Reducing the source of infection is the best way for prevention and control. After flower withering, the infected plants can be burned intensively. In the process of breeding, attention should be paid to moisture-proof, timely drainage in rainy season, and ventilation and light transmission should be maintained. At the time of onset, you can spray 1000 times of 50% of the bletillate wettable powder, or 800 times of 15% of the fenzuning wettable powder for treatment.
Rootstock rot is a very harmful disease of Delphinium, which often leads to devastating consequences. The invasion of pathogens leads to plant wilting and even death. It can be controlled by spraying with 500 times of 30% tobujin wettable powder.
Black spot is also a kind of disease which is more harmful to Delphinium. It will damage the leaves, stems and flowers of Delphinium. Generally, the leaves at the bottom of the plant will be infected first and irregular black spots will appear. Black spot is usually spread by rain, in rainy seasons, and the soil is also very humid.
Once the disease is found, the diseased leaves need to be removed and destroyed in time, and can also be treated with 1000 times streptomycin spray.
The insect pest of Kingfisher is mainly aphid and nocturnal moth, which are two kinds of common pests of Kingfisher. If Kingfisher grows these pests, it can spray them with 2000 times of 10% insect killing cream in time.
