Disease and insect pest control of Thousand-petal sunflower

1. About pest control

In addition to the common wireworms and beetles, the pests that sunflowers may encounter include white grubs, cutworms, grass borers and even sunflower borers. When encountering insect infestation, both the stems, leaves and flowers will be affected. Specific agents can be used to prepare and spray directly on the plants. If the kernel is damaged, wait until the tubular inflorescence withers and then spray the flower disk directly with omethoate.

2. About the prevention and treatment of diseases

1. The main diseases of the thousand-petal sunflower are rust and sclerotinia. In addition, parasitism of Orobanche is also a common disease encountered by the thousand-petal sunflower. Let’s talk about rust first. It is caused by fungi and can be encountered from seedlings to maturity. Generally, you can choose to plant plants that are resistant to the disease and prevent and control rust through crop rotation. When symptoms appear, you can choose to apply potassium fertilizer to this flower. If it doesn't work, you can also treat its stems and leaves with 2000 times diluted 25% carboxin. In addition, starting from after flowering, spraying a 150 to 200 times liquid emulsion of high-lipid film about once every 10 days can also prevent and control rust.

2. Sclerotinia disease is also known as big head rot, which mainly harms stems, leaves and flower disks. You can mix it with wood ash and sprinkle it around the roots. This disease should be prevented and controlled in the early and middle stages of the disease. Once the disease is discovered, the diseased branches, leaves, flowers and fruits should be removed in time. If the disease is more serious, you can also use the method of disinfection first and then spraying the next day.

3. Oleander is a parasitic plant that usually parasitizes on the roots of the spatholobifolia to absorb its sap. It is most harmful to the spatholobifolia when the climate is dry and the weather is hot. The best way to eliminate blight is to dig it up in the field as soon as you find it.