Yesterday, we reported two rental disputes over cockroaches (news review), both of which ended up deadlocked because cockroaches were not properly managed. What kinds of cockroaches are common in life, and how to treat them? Today, the reporter went to consult the experts.
Let's review the two rental disputes that aired on October 10. The first case was the tenant Xiao Zhuo, because when the lease was withdrawn, she did not hand over the second landlord in person, and later, the second landlord said that she found that the wall was full of cockroaches, resulting in her deposit of 5,000 yuan has not been returned.
The second case is the northerner Xiao Cheng, graduated from renting a house, found a lot of cockroaches on the night of check-in, in his words, "never seen such a big scene", he has not dealt with the tenacious cockroaches after three killings, the request to return the room, and there is no negotiation.
Cockroaches belong to one of the four pests, yesterday, the reporter found an expert at the Zhejiang Provincial Center for Disease Control and Prevention Institute of Infectious Disease Prevention and Control.
Wu Yuyan, chief physician of the Vector Department of the Zhejiang Provincial Center for Disease Control and Prevention: "Our most common is these, this is our most common cockroach species, it is called the German cockroach, this is its nymph, this is an adult, its largest can grow to such a large, it is a small cockroach species." In addition, this is called the black-breasted cockroach, we can see that it as a whole is presented in a color of shiny mahogany furniture, and its back plate is not patterned. American cockroach and black-breasted cockroach, in addition to the difference in color, we can go to its back plate, there are butterfly-shaped large spots, its crappy tail, there is a downward tail, which is its and the Australian cockroach, the main difference. ”
Zhejiang Province has been monitoring vector organisms since 2008, and in 2016, Zhejiang Province released a new vector biological surveillance program. Since then, the Provincial Institute for the Prevention and Control of Infectious Diseases has been going to different environments such as restaurants, farmers' markets, and residential quarters every single month to monitor vector organisms through the regular stick-and-catch method, including cockroaches. At present, the German cockroach is the highest density and the largest number of cockroach populations in the province, accounting for more than 90% of the total. In addition, black-breasted cockroaches and American cockroaches account for 5%. Why are there so many German cockroaches? Electron microscopy down for analysis.
Wu Yuyan, chief physician of the Vector Department of the Zhejiang Provincial Center for Disease Control and Prevention: "This is the female of the German small cockroach, this is its egg warp, it will generally hold its egg warp on its abdomen, we are under the mirror, look carefully." It is a tea-brown bug, which is its egg warp, which can now be blurred, and some larvae inside can be seen, generally there will be about 35 eggs. It can reproduce 3 to 5 generations a year. ”
According to experts, the reproductive ability of German cockroaches is amazing, and a German cockroach has been bred from generation to generation, and there are tens of millions of offspring a year. In the home environment, cockroaches do not appear out of thin air, they are all caused by invasion, which is divided into active invasion and passive invasion.
Wu Yuyan, chief physician of the Vector Department of the Zhejiang Provincial Center for Disease Control and Prevention: "To give a less appropriate example, our neighbor's house may be a high density of cockroaches, cockroaches to spread outward, or the neighbor's family is killing cockroaches, using a lot of insecticides, cockroaches feel that the environment, not very suitable for survival, it has to flee." Passive intrusion is the most important way for cockroaches to invade, through our carrying invasion, such as we buy some courier, carry it from the courier, or we buy some old furniture, or something. ”
The eggs of the German cockroach are very soft, so there is the so-called "small strong who can't step on".
Cockroaches also like high temperature and humid environment, so in the means of governance, we must start from its living habits and invasion causes, first of all, to achieve environmental prevention and control, which is also the most critical, such as timely cleaning of gaps in the home, such as wall cracks, insertion and placement. The other is physical control, which is currently divided into two products on the market, one is cockroach sticky board, which attracts and kills cockroaches through pheromones;
The other is bait, which consists of food and chemical components, is slightly toxic and can last for a longer time, usually about half a month.
Wu Yuyan, chief physician of the Vector Department of the Zhejiang Provincial Center for Disease Control and Prevention, said: "Extinguish once, and then do a good job in environmental prevention and control, we are talking about comprehensive prevention and treatment, it is impossible to rely on a certain article to achieve the effect of complete killing." ”
Experts remind that during the physical prevention and control period, everyone has a misunderstanding, like to buy long-lasting bait, do not clean up the cockroach carcass in time, which is not right, because the cockroach excrement contains aggregate pheromones, but will attract more cockroaches.
Source: 1818 GoldenEye