The characteristics of underground pests are as follows:
Earthworms have always been underground activities, mainly feeding on the underground parts of plants. Their damage is characterized by biting off the roots and shoots of seedlings. The fractures are relatively neat, causing the seedlings to wither and die, causing seedlings to fall and ridges to fall.
The ground tiger, also known as tussock, ground silkworm, black soil silkworm, etc., is the main pest of corn seedling stage, especially after rainfall, the soil moisture in the field is good, resulting in favorable conditions for the occurrence of harm to the wet ground tiger.
Chemical control measures:
Irrigation: The heavier plots in the earthworms were sterilized with 50% phoxim-emulsion (l000) and 150-250 ml per plant to kill larvae near the rhizosphere.
The prevention and control of small tigers should adopt a comprehensive prevention and control approach that uses a combination of poisonous soil, poisoned baits, poisoned water, field spray, and artificial capture. For plots with less than 10% seedlings, 40.7% chlorpyrifos EC 1500 times or 50% phoxim EC 800 times, or 4.5% beta-cypermethrin EC 1000x can be used to drip crop roots in the evening. Liquid infiltration into the soil is appropriate.
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