Has this ever happened to you on your flowers?
The leaves have curved white stripes, as if they were drawing a map.
Clematis leafminer fly
In fact, these "maps" are caused by leafminer flies, and flowers such as moonflowers, clematis, chrysanthemums, and dahlias are easily harmed by it. Today we will talk about leafminer flies.
Probability of occurrence: ★★★ ☆☆
Degree of harm: ★★★ ☆☆
Prevention and control difficulty: ★★ ☆☆☆
Prevention difficulty: ★ ☆☆☆☆☆
Harmful symptoms
Leafminers belong to the diptera submersible family, adults and larvae can be harmful, generally occur more in spring and summer.
The larvae often burrow into the leaves, moths eat the leaf flesh between the upper epidermis, causing white serpentine worms to appear on the leaves;
Adults will suck leaf sap, stab the leaves with an egg layer, destroy the chlorophyll of the leaves, and in severe cases, the leaves will wither, fall off, and even die.
Left: Leafminer larvae Right: Leafminer adults
Prevention and control methods
First, the leaves with worms are cut off to reduce the source of insects, and then insecticides are used to control them.
Chrysanthemum leafminer fly
Leafminer flies hide under the epidermis of leaves, and it is difficult for the agent to directly contact the insect body, and the use of contact insecticides is ineffective, and insecticides with an assorptive effect are required.
Touch killing: The insect body is poisoned and dies after contact with the insecticide.
Systemic insecticides: The agent is absorbed by the plant, and the insects will be poisoned and die when they eat the plant.
It is recommended to use Thousand Seasons of Ruili, the main ingredient is thiosefen, which has an excellent systemic effect, diluted with 500 ml of water under pressing 4 times, sprayed on the stem and leaves, and the remaining part of the liquid medicine is watered in the soil. Use 1 time in 5-7 days and 3 times in a row.
Ruili can also be used to prevent the occurrence of pests, the same is 4 times mixed with 500 ml of water, sprayed once a month.
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