Symptoms of psyllid bites

Many people don't know much about psyllids. They belong to a group of the order Homoptera in the class Insecta, and are called metamorphosing insects. They mainly go through three stages: egg, nymph and adult. It is an insect with piercing-sucking mouthparts. If bitten by this insect, it will often cause itching, pain, redness and swelling. At this time, you can use ammonia to relieve the itching. If there is no ammonia, you can use soapy water to wash it. Let's take a look at this aspect.

Symptoms of psyllid bites

Most people will experience redness, swelling, itching, and pain after being bitten by psyllids. At this time, alkaline substances can be used to relieve the symptoms. For example, ammonia water can be used to relieve the itching, or soap dipped in water can be applied to the red and swollen area, which can relieve the itching within minutes. 2. If the bite is very itchy, flick it with your fingers first, and then apply floral water, wind oil, etc. 3. Apply or soak the itchy area with salt water, which can soften the swelling and effectively relieve itching. 4. The juice in aloe leaves can be used to relieve itching. If the area becomes red, swollen and itchy after being bitten by a psyllid, you can cut a small piece of aloe vera leaf, wash it, break it apart, and apply it to the red and swollen area a few times to reduce the swelling and relieve the itching.

Prevention and treatment methods

Taking the control of Pyrus pyri as an example

Manual control: During the winter, remove fallen leaves from under the trees.

Chemical control:

(1) Prevention and control during the dormant period. Spray trunks and branches with 3~5°Be lime sulfur mixture to kill overwintering pests.

(2) Prevention and control during the active period. Depending on the damage situation, prevention and control can be carried out 2 to 3 times a year, and the prevention and control time is June, July and early August. The control effects of 3000 times diluted 1.0% Aino Insecticide, 2000 times diluted 20% Pear Liceba EC, and 1500 times diluted 5% Aphid Licejing EC are all above 95%. 1.0% Aino Insecticide is a biological agent and is more suitable for promotion and application.

Protecting Natural Enemies:

Reduce or avoid using chemical pesticides in orchards to protect natural enemies

harm

Feeding hazards

Psyllids feed on plant phloem, and their growth and development efficiency is controlled by the nutritional status of the plant.

In particular, the amino acid content in the phloem sap; and their feeding harm is due to the influence of toxic substances injected into the saliva, but the presence of plant hormones in the salivary glands of psyllids remains to be confirmed.

The spread of plant diseases

Citrus Huanglongbing is transmitted through the saliva of citrus psyllid. Some plants develop various mildew diseases such as Chinese pear psyllid due to the damage caused by psyllids.