Into Unscientific

Generally speaking, there are usually two forms of use of pyridacloprid:

Intermediate powder and gel bait.

Among them, intermediate powders are mostly used in the agricultural field, with large quantities and wide coverage, but the insecticidal efficiency per unit volume is relatively limited.

After all, insecticidal efficiency and cost are directly linked. The agricultural field is actually arable land or fruit forests, ranging from two or three acres to hundreds of acres.

If they buy that kind of high-efficiency insecticide, the income of the farmers will not be enough for spraying.

In addition to the intermediate powder, most of the commonly used pyridacloprid in the daily life are gel baits, that is, high-specification and high-concentration polymeric insecticides.

For example, Bayer's Baiershi, in theory, kills more than 50 cockroaches with 0.2 grams.

This is true for the third generation of pyridacloprid, let alone the fifth generation of pyridacloprid developed by Xu Yun and the others.

150 ml of water is 150 grams, and the density of the fifth-generation pyridacloprid gel bait is much higher than that of water. The total gel bait contained in two 150 ml syringes is about 700 grams, that is, 7 taels per tube.

This amount of glue bait to wipe the wall

You can simply imagine what the concept is.

More importantly, since the University of Science and Technology is located in the urban area of ​​Luzhou, the drainage facilities of the entire campus must be distributed from the inside to the outside.

Among them, Building No. 14, located on the edge of the East District, is a large outlet node that gathers multiple sewage pipes in the school, and the number of cockroaches around it is several times higher than that in other areas.

Therefore, the seriousness of the whole situation is far higher than what Chang Licheng saw in the dormitory.

When Xu Yun arrived at Building 14, the entire dormitory was surrounded by a large number of onlookers who came from nearby dormitories, and they kept an effective distance of 30 to 40 meters from Building 14 in a tacit understanding.

"Excuse me, I'm Yingwu's teaching assistant, thank you."

Xu Yun got out from the crowd of onlookers with some difficulty, and saw that at the center of the venue—that is, on the open space outside the gate of the dormitory building, there were several dormitory supervisors and inspectors who came on duty at night.

Through the bright flashlights in their hands, they can vaguely see an extremely scary scene:

Students who have lived in dormitories should know this.

Each dormitory building usually has three to five white sewer pipes with a diameter of about 15 centimeters outside, depending on the scale of the building. Most of them are located between the walls where two dormitories meet.

At this very moment, countless cockroaches were slowly climbing from bottom to top along the outer walls of several sewer pipes.

Then turn left on the third floor and climb to the fourth floor through a window at the corner of a staircase

The rest simply poured in through the gate on the first floor, rushing to the fourth floor densely.

Of course, there must be an in and an out.

For example, some cockroaches have been poisoned and entered a hyperactive state, with their wings spread high, and they flew out of the window, followed by a large group of cockroaches of the same sex.

Under the night sky, the onlookers outside seemed to be Cao Cao's army back then, and they were stopped at Dangyang Bridge abruptly by Cockroach Fei.

And mixed in this frightening scene were the closed doors and windows of each dormitory, as well as bursts of strange screams from time to time.

See this situation.

Even the USTC night patrol team with more than ten years of security experience, you look at me and I look at you, standing at a distance with a flashlight, with a dazed look and a loss.

The elder sister of the dormitory at the side has sharp eyes, and her eyes swept across Xu Yun who had managed to get out of the crowd, and her expression was overjoyed:

"Assistant Xu, you're here too? Come and see, what's going on here?"

Xu Yun walked up to them with a wry smile, and looked up at the densely packed cockroaches:

"Sister Liu, how long has this situation been going on?"

Sister Liu is a middle-aged woman with a bloated figure. She and her husband have been housekeepers for more than ten years. Hearing this, she also looked puzzled and scared:

"I don't know either. At that time, I was still cooking for the boys in 203. I heard a strange cry from somewhere, and then I saw a bunch of cockroaches running upstairs. That's the situation."

Open flames are prohibited in the dormitories of the University of Science and Technology, so some dormitory managers will prepare some small dishes such as chicken offal on weekdays. If students want to drink some beer in the dormitory on weekends, they can order a plate or two at a very affordable price. A little extra money.

It turned out that Sister Liu was continuing her private work. When she realized something was wrong, she quickly turned off the stove and ran out with her husband.

Xu Yun couldn't help sighing when he heard the words:

"Sister Liu, have you contacted the school leaders?"

"I just made a phone call with several counselors and the leaders of the branch of the hospital. Dean Tian is on his way here."

"Dean Tian? Has he not rested yet?"

"No, he said he was doing some experiments, and when he heard the news, he told me that he would be there right away, and that he didn't need to call the fire brigade."

When Xu Yun heard this, he couldn't help but feel relieved.

Looking at the entire University of Science and Technology, apart from Qiu Sheng and several members of the research group, the only one who could guess the inside story in a short time, aside from Xu Yun himself, was Tian Liangwei.

If it was another school leader or even a school leader, what would happen if they didn't keep things in order?

Those with a relatively stable mentality may be able to deal with it calmly. If they encounter some emotional leaders, they may make up their minds in the direction of earthquakes or even demonization. After all, most schools are built on cemeteries. Many school leaders are very superstitious.

Basically, among the top ten campus legends in every school, there will be more or less something to do with A Piao.

In this way, about twenty minutes passed.

Tian Liangwei finally rushed to the scene with his assistant.

As soon as he separated from the crowd and walked outside, Tian Liangwei felt his scalp tingle. Looking at the densely packed cockroaches, his hometown dialect came out:

"Mother Xipi, there are so many cockroaches? Xiao Xu, what did you do?"

Xu Yun, who had been waiting here for a long time, sighed quietly, and described the whole process in detail, trying to take the responsibility on himself as much as possible between the lines:

"That's almost the case, Director Tian, ​​this is mainly my responsibility, I didn't explain the dosage to Li Cheng and the others."

Tian Liangwei frowned at the beginning, but as he listened, the expression on his face gradually became a little weird:

"It's not all your fault, it's a matter of poor information. Those two treasures probably searched the Internet for pyracloprid for agriculture, and thought that the effect you gave them was just that.

Forget it, let's not talk about it, Xiao Xu, what can you do now? "

Xu Yun was silent for a while, then said:

"Director Tian, ​​the first thing we need to do is to stabilize our emotions. Just now I have contacted several cadres of the physics department in the dormitory building. After group-to-group and person-to-person notifications, the doors and windows of each dormitory have been closed.

Now the students in the dormitory are mainly emotionally fluctuating, and the others are not affected much, so more effort is needed to appease the work. "

After he finished speaking, he paused and continued:

"As for the follow-up suggestion, my opinion is...wait!"

"wait?"

Xu Yun nodded and said:

"After all, two tubes of gel bait are obviously excessive in terms of dosage, but that's the case in terms of coverage area.

If there is no accident, it should have spread to the third generation of receptors by now, and it will almost stop after two more rounds.

So instead of interfering manually, it's better to just wait on the sidelines, and then spray some disinfecting substances around to prevent the cockroaches from escaping.

Only in this way, the students in the dormitory may have to do a good job of psychological counseling, or should everyone add a 0.2 grade point at the end of the semester? Guaranteed to be alive and kicking tomorrow! "

Tian Liangwei's mouth twitched a few times:

".You made it up by yourself, let the school make up for the grade points?"

Then he sighed:

"Let's talk about the compensation at that time. I'll let you do what you say about the solution. I'll explain it to the college and the school. Good guy, at first I thought it was a biochemical crisis."

While Xu Yun and others were talking, the Internet gradually became lively.