Control methods of diseases and insect pests of Vitex chinensis

Vitex mandshurica is the fruit of Verbenaceae plants. It is a traditional Chinese medicine with the effect of dispersing wind and heat and clearing the leader. It is often used for headache, migraine, dizziness and other diseases. So how to prevent and control diseases and insect pests when planting bauhinia? Let's take a look at the detailed introduction.

1. Bituminous coal disease

This is a fungal disease, which mainly harms the leaves and young fruits. When the disease occurs, the leaves are covered with soot, which seriously affects the photosynthesis of the leaves and the commercial value of the fruits. The pathogen overwinters in the hyphae or conidia and spreads in the following spring with the help of wind and rain. Aphids also spread, and secretions promote the occurrence of the disease. In poorly cultivated orchards, especially in a hidden and humid environment, it is beneficial to the prevalence of the disease.

Prevention and control methods: to prevent and control the occurrence of aphids, cut its transmission route, strengthen inter-garden management, appropriate pruning, and increase permeability. When you get sick, you can spray carbendazim 500 times or Bordeaux 500 times, and the mildew layer can fall off in summer.

2. Leaf spot

The disease mainly harms the leaves, petioles and stems, when the disease occurs, the leaves appear round spots, which gradually expand into irregular spots, and there are wheel lines in the middle of the spots, and gradually turn reddish brown into dark brown. When the disease spot spreads the whole leaf surface, the leaf loses photosynthesis completely. The pathogen generally overwinters on the remnant of the disease, and infects the host with the help of wind and rain in the following year, and the disease is more serious from August to September. In addition, continuous cropping, high planting density and poor permeability are all conducive to the occurrence of the disease.

Prevention and control methods: remove the diseased leaves in time when the disease occurs, in order to prevent the spread of the disease, you can spray topzine, mancozeb, azoxystrobin and other medicament control, we should pay attention to the alternate use of medicament, so as to avoid drug resistance.

3. Blow cotton scale insects

This insect harms the branches and leaves of the plant with females and larvae, constantly sucking the sap on the stems and leaves, making the stems and leaves dehydrated and scorched. The fecundity of this insect is very strong, and it begins to occur in April and spreads rapidly, causing a large number of plants to suffer into pieces. it will also induce the occurrence of plant bituminous coal disease.

Control methods: in the occurrence of larvae, you can use dimethoate 400-800 times liquid spray, or the use of seven-star flesh insects, heterochromatic insects and other natural enemies. For the initial stage of insect pests, the plants around the diseased plants can be cut off to control the spread of insect pests.

The above is the introduction of pest control methods of Vitex mandshurica, hope to help you, want to know more related knowledge, please follow us.