The types of underground pests that occur in the fields in Langfang City, Hebei Province are mainly the golden-earworms, cockroaches, cockroaches, and earthworms. These pests often eat seeds or bite off the underground rhizomes to cause seedlings to die; or to eat underground rhizomes to make the crop grow weaker and affect the yield and quality of the melons. Now introduce several prevention methods. First, the application of adequate decomposition of organic fertilizer, and in the manure block a certain amount of the agent, the drug selection is diazinon 50 grams or 80% of dichlorvos EC 1000 times. Second, the fall to the ground to kill part of the overwintering. Third, choose coated seeds. Fourth, after discovering the harm of underground pests, it is necessary to promptly pour roots with pesticides. The pharmaceutical agent is selected as Lesiben, and the dosage of mu is 400-500 ml. Fifth, the use of soil insects to kill 4000-8000 grams per mu, control effect is not bad.
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