Control techniques of diseases and insect pests of Forsythia suspensa

Forsythia, also known as Huang Shoudan, has very high medicinal value and ornamental value. The last thing you want to see when planting is diseases and insect pests. It does great harm to the plant, and when it is serious, it will cause the plant to wither and die. So what diseases and insect pests does Forsythia suspensa have? How to prevent and cure it? Let's take a look at the detailed introduction.

1. Leaf spot

The main disease of Forsythia suspensa is leaf spot, which is a fungal disease. The pathogen first infects the edge of the leaf, gradually develops to the middle of the leaf with the development of the disease, and will die in the later stage of the disease. Leaf spot disease mainly occurs at high temperature, which usually occurs in May, and the disease peak is from July to August. The high temperature and humidity climate and poor ventilation environment are conducive to the spread of the disease, and the pathogen propagates in a short time, resulting in plant death.

Control methods: to prevent and cure the leaf spot of Forsythia suspensa, we should often prune branches, sparse miscellaneous branches and over-dense branches, increase plant permeability and maintain good ventilation. In the planting of Forsythia suspensa, it is necessary to strengthen its fertilizer and water management, pay attention to the balance of nutrition, fertilization should not be partial application of nitrogen fertilizer, so as not to plant overgrown, luxuriant branches and leaves, resulting in closed branches and leaves, which is conducive to the reproduction of bacteria. When it is found that the plant has leaf spot disease, chlorothalonil and carbendazim should be sprayed in time, once every 10 days, continuously spraying 3-4 times, can effectively control the disease.

2. Insect pests

The main pests of Forsythia suspensa are cicadas, scale, moths, leaf roll weevil, aphids, pine oak caterpillars and so on. They will harm different parts of Forsythia suspensa and seriously affect the growth of plants.

Control methods: for the above pest infestation, different methods can be adopted, cicadas can be sprayed with imidacloprid suspension agent, scale species can be sprayed with scale mites or Shu Ke branch in the egg stage, leaf weevil can be sprayed with hypertonic phenoxarb EC in the adult stage, moths can be sprayed with Kangfuduo concentration or nicotine, and pine and oak caterpillars can be sprayed with hyperosmotic phenoxarb in the larval stage.

The above is the introduction of forsythia pest control technology, hope to help you, want to know more related knowledge, please pay attention to us.