The main cause of spinach leaf miner is that the larvae of the spinach leaf miner feed on the leaf and form a wide tunnel. Harmful impact on quality, loss of commodity value, heavy damage will cause the destruction of the whole field, and the loss is great.
First, the law of occurrence
Spinach leaf miner hatch more than in the evening, hatching larvae looking for leaf drills without rumbling. When the environment is suitable, the leaf flesh can be drilled in 1 day, but when it is not suitable for the host, it can also feed on manure or humus to complete development. . After the larva is matured, some of it is in the mesophyll, and some of it is in the soil. The larvae of the wintering dynasty all fell into the soil, and the pupa period was 6 months.
Second, prevention and treatment methods:
1, early harvest
The roots of wintering spinach must be harvested before the rain, to reduce the overwintering adult eggs.
2, deep land
Deep harvesting of the land in time after harvest will not only benefit the growth of the plant, but also destroy some of the cockroaches that have entered the soil and reduce the insect source in the field.
3, apply enough base fertilizer
Applying the base fertilizer requires the application of fully decomposed organic fertilizer, especially manure, so as not to bring the insect source into the field.
4, chemical control
In the critical period of the leaf-flying period of the leaf miner to the early stage of hatching, the drug has not been drilled into the leaves, otherwise the spraying effect is poor. Can spray 2.5% deltamethrin EC 2000 times solution, or 20% cyanurate EC 3000 times solution, or 40% chrysanthemum EC 3000 times solution, or 10% Bromo Horse EC 1500 ~ 2000 times solution, Or 90% of the trichlorfon crystal 1000 times liquid for control.
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