Team:SZU-China/Investigation

Investigation

As the usage of the applet increases, more and more people are paying attention to our project.And some of them even give some comments on the applet. Among these comments, the most concerned is that people are worried about the hygiene of public caterin, especially cockroach. Many people feel that their vitality is too tenacious, and they like to grow in nutritious places, so dining places such as canteens, restaurants have become a dangerous place. In the hardest hit areas, everyone is deeply worried about the quality of their daily diet. At the same time, there are many people who want to get some basic knowledge about cockroaches through our applet platform, especially how to kill and how to curb excessive reproduction. In order to solve everyone's concerns and meet everyone's needs, we plan to carry out two activities.

First of all, we are going to interview the manager of the catering industry. We have chosen to interview the school cafeteria where the number of people who eat more often and the food reserves is more abundant. From the manager's interview, we know that the dining hall has done a lot in the prevention and control of the cockroaches. When we are still asleep, they have to start sifting vegetables to prevent insects from being mixed in the meat. After the meal, they sprayed around the canteen and the dining hall to drive away the cockroaches and flies in the dining hall. However, everything they do can't completely eliminate the hazards of cockroaches. In order to make students to be eat healthy, they have to increase their efforts and kill the canteen every weekend. This also increased the killing work and increased the consumption of funds.

Then, in order to more accurately meet the needs of the masses for prevention and control related knowledge, we went to Shenzhen Nanshan District Center for Disease Control and Prevention to interview Xu, who has many years of experience in prevention and treatment and is responsible for the related killing. Supervision of activities. Through an interview with Director Xu, we know that the government has always been responsible for the cleaning of the streets. In addition, they will regularly go to the community to teach people in the community to kill the cockroaches correctly. In the interview, they also admitted that the use of chemical methods to kill is indeed a little unfriendly to the environment. But compared to other methods currently on the market, improved chemical reagents are the most efficient and are relatively safe. In addition, Director Xu gave us some advice on our project. I hope that we can ensure his controllability and efficiency through the large-scale use of genetically modified strains. CDC is more willing to use a more environmentally friendly biological approach to eliminate cockroaches if the the cost and effectiveness are the same.

Our project is to use the fungus of Metarhizium anisopidae as a fungal insecticide, and mainly for family, so we want to design a special box based on the characteristics of cockroaches and Metarhizium, so we designed it. In the first version of the box, we did the relevant experiments and found that the effect of this box is not good. The cockroach can't enter the inside of our box very well, we need to make further improvements. We learned that Professor Wang Zhongkang of Chongqing University has made great achievements in the research of Metarhizium biologics. He also has a special company in Chongqing called the major organism, which is also a research on Metarhizium biologics. So we came to Chongqing University and visited Professor Wang Zhongkang.

First of all, Professor Wang Zhongkang says that our box design is unreasonable. It is too difficult for cockroach to enter the box, and the box itself is not very attractive. Then he simply describes the habit of the cockroach. He said that they like to climb hills, like to drill gaps and like to live in dark environment. Then he said that the convenience and effect of the use of a powder of Metarhizium are not as good as the one he recommended in the company. Milk powder can be well-attached to the non-woven fabric, and a small amount of oil can be added to make the milk powder adhere better to the sputum surface and infect the cockroach.

In the afternoon, Professor Wang took us to visit his factory. He briefly introduced the fermentation process of some fungi. After listening to the introduction of our project, he said that the prospect of our project is very broad. If we can develop it, he can help us in the mass production, listing, sales and other aspects of the products.

After the visit to Chongqing, we summarized Professor Wang's suggestions and after some discussion, designed the second edition of the box.