At present, most of the rice seedlings are in the slow seedling stage, and the bottom leaves are in contact with the water surface for a long time, and the leaf miner is generally prone to occur in the 4-6 leaf stage after rice insertion. The pests are more harmful to rice during this period, if not found in time. From the local occurrence to the occurrence of the whole field, the prevention and treatment will not progress from the individual plants to the whole piece and the whole field, and the leaves will be killed due to the chlorophyll being sucked.
When we transplanted, some of the seedlings were weak, the leaves were not strong, and the leaves floated on the surface of the water or after the insertion, due to the rain, the farmers were not willing to drain, causing the water layer to be too deep to submerge the seedlings or the unevenness of the fields, and the low water layer was too deep. Both create conditions for spawning and occurrence of leaf miners. How to prevent it? Then look down
Control method:
1. The water should be leveled, so that the water is not exposed to the mud, so that the depth of the whole water layer can be guaranteed.
2, in the rice before the 6 leaves before the water layer should not be too deep, flower water can be, not to mention the water, in the prone to the leaf fly easy to develop due to rainfall to deepen the water layer, must discharge the excess water layer.
3, strong seedlings to the ground, to ensure that the blade is strong, to avoid the leaves floating on the water.
4. Strengthen the prevention and treatment of chemicals.
First, the seedlings are sprayed with a systemic insecticide before insertion, which is also called taking the medicine to the ground. It can have certain control effects, but it does not achieve a thorough effect. In the case of deep water flooding, the leaf miner will still occur.
The second is to prevent in advance, in the initial stage of the leaf miner larvae, you can choose 40% dimethoate 100ml / acre, or 70% Emerald 6-8g / acre + 2.5% enemy kill 20-30 ml / acre, or 25 % Akte 6-8 g / acre, spray control with water mist sprayer. For the field where the leaf miner has been harmed, it is necessary to prevent it early and routinely control it 1-2 times.
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