In spring, as the temperature rises, all kinds of pests and diseases begin to be active, and this is the peak period of aphid reproduction and damage.
1] Harmful manifestations of aphids:
1. Leaf deformation: the affected leaves will have symptoms such as curling and shrinkage, and in severe cases, it will even cause the leaves to fall off.
2. Growth retardation: Aphids sucking plant sap will cause plant malnutrition and affect the normal growth of plants.
3. Honeydew pollution: The honeydew excreted by aphids will pollute the leaves and fruits, affecting the photosynthesis and quality of plants.
2] Aphid hazard identification:
The method of identifying aphids is simple, they are usually green, yellow or black, tiny in size, and clustered on the new shoots, young leaves and twigs of plants.
3] Several types of aphids that often occur in spring:
1. The polymorphic hairy aphid is tiny, usually green or yellow-green, and the surface of the body is covered with a layer of fine hairs, which is also the reason for its name. Polymorphic aphids mainly gather on the young leaves and branches of the Luan tree, forming a dense insect colony, which usually reproduces in large numbers between March and April.
2. Peach aphid: Spring is the active period of peach aphid, mainly harming fruit trees such as peaches and plums, usually multiplying in large numbers between March and May, and swarming on young leaves and young branches to suck sap.
3. Cotton aphid: Cotton aphid is also very common in spring, mainly harming cotton, flowers and other plants, usually reproducing vigorously from April to June, causing serious harm to plants.
4] Spring aphid control measures:
1. Biological control: natural control by using natural enemies such as ladybugs and aphid-eating flies.
2. Physical control: use physical tools such as yellow boards and sticky insect boards to trap aphids.
3. Chemical control: When the number of aphids is large and the damage is serious, long-term products such as Qilin drip kit and tree insect removal can be used for prevention and control. Qilin instillation set adopts the method of drug delivery, which can directly deliver the agent to the plant to achieve the effect of long-term prevention and control; The root application method is used to absorb the agent through the root system of the plant to achieve the effect of whole-plant control.