Analysis:

1. What are the hazards of cockroaches?

Cockroach is a worldwide health pest, which is closely related to human beings and does great harm to thousands of households. There are six common indoor cockroaches: Blattella germanica, Periplaneta americana, periplaneta fuliginosa, Periplaneta japonica, Periplaneta australis and periplaneta fuliginosa.

The harm of cockroaches mainly includes the following four aspects: (1) biting clothes, books and daily necessities; (2) Stealing food, leaving a bad smell on the food and utensils that climb up, causing pollution; (3) Carrying dozens of pathogens such as bacteria, viruses, molds and parasite eggs to spread diseases; Cockroach corpse dry powder will cause allergic reaction after contact with human body, causing allergic dermatitis, skin blisters, skin itching, allergic rhinitis, infant asthma and so on. (4) Drilling into TV sets, communication equipment, computers and other electronic devices and hiding them will easily lead to short circuits and failures. It can be seen that the harm to cockroaches must not be taken lightly.

Second, how to eliminate cockroaches?

Cockroaches are omnivorous insects that eat both vegetarian and non-vegetarian foods. They like to eat garbage, feces, animal carcasses and other rotting and fermented organic matter. They are usually hidden in crevices and corners such as cabinets, tables, pools and operation desks. Periplaneta americana is also found in outdoor sewers, heating ditches and garbage places. Blattella germanica is common in trains, ships, restaurants, hospitals and buildings with heating equipment. Cockroaches love darkness and are afraid of light. They sleep during the day and come out at night. They are nocturnal insects. Cockroaches are most active in the temperature range of 15-37℃, and easily die when the room temperature exceeds 40℃.

To kill cockroaches, we should prevent using only one method or only one chemical insecticide for a long time, but pay attention to comprehensive prevention and control. The so-called integrated control is based on the ecology of pests, starting from the overall concept of pests, the surrounding natural environment and social and economic conditions, adopting environmental, chemical, physical, biological or other effective means according to local conditions, organically forming a set of systematic control measures, controlling the pest population at an insufficient level, and striving to eliminate pests in important areas and conditional local areas, thus achieving the purpose of eliminating pests and diseases.

1, environmental protection

Do a good job in indoor and outdoor sanitation, remove the garbage in the living room and keep the kitchen clean, and plug the gaps in time to prevent plugging. Doors and windows must be tight and seamless, and the gap between the wall and neighbors and outdoor communication should be blocked to prevent the egg sheath from entering the room. When moving furniture indoors, you should carefully check the whole box to prevent cockroaches and their egg sheaths from being brought indoors. The sewer must be dredged frequently, and the opening leading to the room is covered with a small iron net to prevent it from climbing into the room from the sewer.

2. Chemical control

The use of chemical pesticides is still the main means to kill cockroaches, which has the advantages of quick effect and high efficiency. However, in order to prevent the abuse of drugs such as increasing the concentration at will and prevent the occurrence and development of insect resistance, attention should be paid to the combination and rotation of pesticides. Commonly used methods are: (1) residual spraying: it can quickly knock down and kill, and the residual effect is good. (2) Poisonous bait: It should be scattered in places where cockroaches often move, with less quantity and more piles, so that pests have more opportunities to eat poisonous bait. As long as the poison bait has good palatability, good placement and high coverage, the killing effect is generally satisfactory. (3) Cockroach-killing chalk: Apply a medicine belt with a width of about 3 cm in the place where cockroaches often appear, which has a good killing effect on cockroaches.

3. Physical prevention and control

Physical control is also a method to kill cockroaches, such as scalding, sticking and trapping, which can be used as an auxiliary method.