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There is no doubt that cockroaches also ask Blattella germanica to buy cockroach killing drugs, which will soon disappear if scattered in the corner. Blattella germanica is common in all kinds of cracks, such as cracks around pipes, walls and wallboard and cracks between floors. Periplaneta americana also likes to live in big holes, preferring hot and humid environments, such as fermentation workshops of breweries and bean products processing plants, and often lives in cool wells, sewers and basements in groups. Periplaneta fuliginosa is more common in the corner under cupboards, tables and pools. In winter, most of them live in the kitchen and live and move around heat sources such as stoves and radiators. In hot summer, the temperature in the kitchen is too high, and they migrate to other places, so the density of cockroaches in the kitchen decreases, but the distribution expands. Cockroaches also live in groups. It is often found that in a habitat, there are always as few as a few, and as many as dozens or hundreds of them gather together, mainly because of the lure of pheromones. Both adults and nymphs of cockroaches can secrete an aggregation pheromone, which is secreted by rectal pad and can be excreted with feces. In the place where cockroaches live, brown spots on their feces can often be seen. The more feces, the more cockroaches gather. Therefore, it is an important measure to do a good job in hygiene and remove cockroach traces. Cockroaches are omnivorous insects with a wide range of food. All kinds of food, including bread, rice, cakes, vegetarian and cooked food, melons and fruits, drinks, etc. I especially like delicious, sweet and oily pasta. Cockroaches have the habit of eating oil. Among all kinds of vegetable oils, sesame oil attracts them the most, so some places call them "oil thieves". Among sugars, brown sugar and maltose have the strongest attraction to them. Besides all kinds of food, cockroaches often eat other things, such as cotton and wool products, leather products, paper, books and soap in houses, warehouses and storerooms. In outdoor garbage dumps, sewers and toilets, they feed on rotten organic matter and even kill animals. Drug control cockroaches often dig holes and hide in cracks and caves. For crevices, caves and corners, Quebang spray can kill common pests including cockroaches, which is suitable for pregnant women. Close doors and windows and exhaust facilities of electric fans when spraying. The cockroach has escaped. For places such as crevices where cockroaches inhabit, you can spray a 30-50 cm medicine belt around them first, and then spray wine in the crevices. In places where cockroaches are concentrated, direct spraying will stimulate cockroaches to flee everywhere. Cockroaches should be sprayed on the periphery of the place where cockroaches are concentrated, forming a closed circle and spraying from the outside to the inside, so that cockroaches can get enough doses when they run outside. Cosway powder. It should be placed in a place frequented by cockroaches, so that cockroaches can contact with poisons, which has contact and stomach killing effects. The duration is long, usually 1-2 months, but it should be moisture-proof. Cosway bait. More and less, 0.5- 1 g/m2, placed in the place where cockroaches often move. It lasts for a long time, is safe, efficient and convenient, is not easy to produce drug resistance, spreads toxicity among cockroaches, and leads to the death of cockroach groups.