The pests of the corn seedling stage are mainly two points of nocturnal moth and small land tiger, the two hazards are very similar, are the larvae hiding under the broken wheat straw around the corn seedlings during the day, and coming out at night to harm the stem base of the corn seedlings, causing the corn seedlings to die partially on the ground, resulting in the lack of seedling ridges, because they cannot be seen during the day, nor are they harmful, so it is very difficult to control. Today, Xiaobian will introduce you to one of the simplest and most effective prevention and control methods.
Hazard characteristics
The two-point nocturnal moth is very similar to the small ground tiger, the two-point nocturnal moth mainly occurs in the plot of wheat straw, the adult worm will lay eggs in the soil cracks around the corn seedlings, after the eggs hatch, the larvae hide under the broken wheat straw around the corn seedlings during the day, and come out at night to harm the base of the corn stem, and the victim part forms a 3 to 4 mm round or oval hole, when severe, the entire seedling is cut off at the base of the stem, causing the corn in the upper part of the ground to wilt and die. When the corn seedlings are larger, they can bite off the air roots and main roots, causing lodging, and when severe, the seedlings die.
Prevention and control methods
The most effective way to control the insect is to mix seeds, before sowing, per acre with 20% chlorhexenamide suspension agent 1--2 ml + 60% imidacloprid suspension seed coating agent 5-6 ml, add an appropriate amount of water, the seed coating agent is evenly wrapped on the surface of corn seeds, and then dried and re-sown in a cool place, you can effectively control the harm of underground pests such as the two-point night moth, small land tiger, golden needle worm, etc., and can also treat the harm of aphids, gray planthoppers, thrips and other ground pests, with an effective period of up to 30 to 50 days. This ensures that no pests occur during the entire maize seedling period.
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