Underground pests refer to a class of pests that live in the soil during the hazard period, mainly including cockroaches, crickets, tigers and golden worms. There are many kinds of such pests, which are harmful to the host, not only harming vegetables, but also harming flowers, wheat, corn, sorghum, lawn, tobacco, fruit trees and seedlings. They mainly feed on the seeds, roots, stems, roots, tubers, seedlings, young leaves and growth points of crops, often resulting in lack of seedlings, ridges or poor growth of seedlings.

   The best way to prevent underground pests is:

   Yaojibanzhong Isofenphos EC 500 ml of water was added 40% methyl 50--60 kg mixed with wheat, corn, sorghum, peanut seeds 500--600 kg uniform spray, spread out to dry immediately after planting opening. Valid for 30 days - 35 days, it can control underground pests such as cockroaches, cockroaches, yellow ants, and golden worms.

   Deep plowing before winter freeze a month, 35 cm deep plowing the soil, with farming and pick up insects, pests can survive and destroy the environment through the winter plowing, population density reduce the following year.

   After harvesting the idyllic crops, weigh the weeds in time to reduce the spawning and hidden places of pests. Before the emergence of crops or during the period of seedlings of the 1st - 2nd instar, timely weeding the weeds in the field to reduce the early feed of the larvae. Weeds are buried or transported out of the field to eliminate the spawning host.

   When the roots are filled with pests at the seedling stage, 90% crystal trichlorfon 800 times solution, 50% diazinon emulsifiable concentrate 500 times solution or 50% phoxim emulsifiable concentrate 500 times solution may be used, and one type of irrigation root may be used. 8 - 10 days of irrigation, continuous irrigation 2 - 3 times. The soil pests in the high density plots can be 40% methyl isofenphos 50--75 grams water 50--75 kg to 4 p.m. start filling in the root seedlings, cutworms killing effect of 90% Above, it is also possible to combine sputum and golden worms.

   Spreading toxic soil with 5 % butyl phosphate per hectare 37 . 5 - 45 kg, ditch application, acupoint application, the efficacy period is up to 60 - 90 days. Or 50% phoxim per 1 hectare. 5 kg, mixed with fine sand or fine soil 375 - 450 kg, ditched into the soil at the root of the crop, then covered with soil, or combined with the sputum to apply the soil, can control a variety of underground pests.

   In areas with good water supply and water supply conditions, timely irrigation after the occurrence of the ground tiger can receive unexpected results.

   Lethal adult (1) black light traps. The adults of the scarab, the ground tiger, and the cockroach have a strong tendency toward the black light. According to the actual situation in each place, under the possible conditions, some black light lamps are placed to trap the adult during the prosperous period. (2) Place the sweet and sour wine pot to trap the adult of the tiger. (3) Use the sauteed wheat bran and bean cake to trap the cockroach. Generally, in the evening, there is no rainy day, pits are pitted in the field, poison baits are applied, and the next day, the next day, the insects are concentrated and treated. (4) Poison bait trap. Cut fresh grass or vegetables, add 100 % phoxim 100g with water 2 - 2 . 5 kilograms, sprayed on 100 kilograms of grass, divided into small piles in the evening to place the field, trapping the tiger. With about 1 meter long branches soaked in fresh Young 50-fold diluted solution of 40% omethoate, taken out after 10 hours, the spring crop is inserted in the evening, the per hectare 150 - 200 branches, decoy beetle good effect. Will be new rapeseed cake 2 . 5 kg smashed, put the saute in the pot, put the fried rapeseed cake in the bucket, then pour the trichlorfon with warm water into the bucket, suffocate for 3 - 5 minutes, divide the poison bait into the evening A small number of small parts were scattered in the field of transplanted cotton fields, and the poisonous dead tiger worms were seen early the next morning.

   The ground applied medicinal enemy to kill the conventional rule of law as a new rule of law tiger. The practice is: use a knapsack sprayer after the evening work, use 30 barrels of water per hectare , and add 2 to each bucket of water . 5 % of the enemy killed 8 ml, formulated with 2000 times the drug solution, stirred evenly, and sprayed all over the floor. As night falls, the temperature drops, the amount of evaporation is small, and with the dew coverage, the soil and the seedlings are all in a wet state, ensuring the efficacy. When all kinds of tiger larvae come out to harm the seedlings, they are meeting with the drugs. The stomach poison, the heavy smoke, the touch of a few arrows, the efficacy can be fully exerted, all the tiger larvae are poisoned, reaching 100 % insect control effect. This pest control technology is used in various seedlings of dryland crops with good results.

   Spraying the plants with 90% trichlorfon 800--1000 times, 50% phoxim 1000--1500 times, 50% diazinon EC 1000--1500 times, optionally one or more agents, adult During the occurrence period, spray 2 - 3 times, every 7 - 10 days, spray once, have a good control effect.