First, the harm symptoms: small tigers, also known as silkworm or cutworm, the main bite the plant near the surface of the tender tissue, corn or vegetables are at the seedling stage is harmed, often a large number of broken seedlings.
Second, the occurrence of conditions: the occurrence of small tigers and climate and the former crop has a close relationship, 9 °C ~ 29 °C temperature conditions suitable for the occurrence and reproduction of small tigers.
Third, prevention and control methods: (a) in the morning to open the soil near the roots of the damaged plants, artificial capture of larvae or adults. (2) 90% trichlorfon 0.2 kg/mu, or 80% dichlorvos EC 0.1 to 0.2 kg/mu, and water/water 75 to 100 kg/24 g/kg insect-infestation points have better control effects.
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