Chapter 68 Everything is ready, all we need is the east wind (please vote!!!)
In the laboratory.
After discussing the handover matters.
Xu Yun shut down the penguin colony and began to prepare gel bait for actual combat.
About half an hour passed.
Ding dong——
Along with a vibration, a WeChat alert sounded.
Xu Yun opened his cell phone and the sender was Chang Licheng, the monitor of Class 2 Yingwu.
He hurriedly replied "Wait a moment", picked up the small medicine box he had prepared and got off the elevator.
Five minutes later, Xu Yun walked out of the door of the medical center building.
"Xu Shen! Here!"
As soon as he went out, a burly boy ran in front of him.
The boy is about 1.85 meters tall and has a very reliable Chinese face. From his sparse hairline, it can be seen that his grades must be good.
This person is Chang Licheng, the current class president of Applied Physics Class 2. He is also one of the top three academics in the department and a department scholarship winner, but he is still far from being a 'study god'.
"Li Cheng is here, thank you for your hard work."
Xu Yun greeted the visitor familiarly and handed over a bottle of mineral water brought from the laboratory:
"Come on, have a drink of water first, and I'll tell you the specific steps."
Chang Licheng took the mineral water and took a big sip while listening.
Xu Yunxian took out a simple reagent similar to a syringe from the small box and waved it in front of Chang Licheng:
"What I have on hand is a newly synthesized cockroach poison. The specific ingredient is called imidacloprid, but as a physicist like you, you probably won't understand what it is. In short, it is just a special insecticide."
Then he took out another piece of white test paper and squeezed a piece of gel bait the size of a rice grain on it:
"Here, watch out, you only need to squeeze out a small amount of cockroach poison each time. If you squeeze out too much, it will be wasted.
Small amounts and frequent times are the key words. ”
Chang Licheng nodded, wrote down the dosage, and asked:
"I understand, but Xu Shen, does this thing need to be squeezed into a certain position? Or can it be anywhere?"
Hearing this, Xu Yun quickly shook his head and said:
"You have reached the key point, Li Cheng. Please recall carefully first. Have you ever seen some dry, non-sticky, small, sand-like, and very dense brown speckled particles in the dormitory?"< br>
Chang Licheng was stunned when he heard this. After thinking for a few seconds, his eyes suddenly lit up:
"Huh? What you said, Xu Shen, seems to be true!
I saw a lot of them in the corner of the washing machine in the dormitory, and occasionally on the desk. My roommate even said they were rat droppings! ”
"That's indeed shit, but it's not rat shit, it's cockroach excrement."
As Xu Yun spoke, a hint of gloom flashed in his eyes again:
"In short, you just need to apply the glue bait near the black spots first. You can also apply some at the corners. This is called fixed-point sniping."
Cockroach poop is not just a kind of cockroach excrement.
There is no single piece of cockroach droppings. Every time it is found, it is randomly distributed in a dense distribution.
Translated into human words, it is just a handful of small black dots, which has a very typical "intensive" effect.
This is because the rectal pads of both adult and nymph cockroaches can secrete an "aggregation pheromone" that is excreted with cockroach feces.
This kind of pheromone will send a message to the surrounding cockroaches: "You are stupid, eat more, be safe, come quickly." It will also become food for small cockroaches.
Cockroach droppings usually appear in the shade of bathrooms, kitchens and balconies, which are also excellent locations for placing gel bait.
After introducing the use of gel bait, Xu Yun is left with some details:
"Li Cheng, go back and tell your classmates that when you put out the glue bait, try to cover the entire floor as completely as possible.
Imidacloprid is a pesticide specifically targeted at insects and is harmless to mammals. Unless you swallow twenty sticks of gel bait in one go, there will be no problems for the human body.
In addition, I also added a bitter agent in it, so even if stray cats and dogs come in and eat it by mistake, they will not be poisoned. ”
Chang Licheng wrote down Xu Yun's instructions one by one, then said goodbye to Xu Yun and returned to the dormitory carrying the small box.
The dormitory for the Applied Physics major is in Building 14 in the East District, next to the Pomegranate Garden, a holy land for donations, and very close to Susong Road, so the number of cockroaches is higher than in other dormitories.
Before leaving the dormitory, Chang Licheng specifically asked several dormitory leaders that there should be at least one person in each dormitory waiting for follow-up notification.
As an out-and-out Liaodong man, Chang Licheng is as generous and generous as most Northeastern men. His character has been unanimously praised by everyone in the class in the past year and a half, and he is extremely popular.
Not to mention that there are so many followers if you raise your arms, at least everyone will pay more attention to what you say.
With the blessing of his charisma, when he returned to the fourth floor where Class 2 was located, most of the dormitories were ready according to his requirements.
At this moment.
Even Ye Guohong, who had gone out with his girlfriend earlier, rushed back and was waiting for him at the entrance of the dormitory corridor.
Seeing Chang Licheng appear, Ye Guohong took the initiative to greet him and paused for a moment on the white suitcase in his hand:
"Hey, Lao Chang, are you planning to change your career to become a technician? Are you picking ears or cutting feet? Where are the slipper cards?"
"Roll, roll, roll!"
Chang Licheng first made an international friendly gesture to his gay friend, then looked solemn and asked:
"Lao Ye, are everyone in every dormitory here?"
Seeing that Chang Licheng was talking about business, Ye Guohong stopped joking and pointed to a closed dormitory seven or eight meters away:
"All four people in He Tao's dormitory are working part-time. In addition, there is at least one person in each dormitory."
Chang Licheng nodded slightly. It was the weekend now, and it was already very rare to have only one dormitory with no one:
"If it's a dormitory, don't worry about it for now. Lao Ye, organize it and call the dormitory director or dormitory representatives to my place. I will hand over the details to everyone."
Ye Guohong can be regarded as Chang Licheng's old partner. Hearing this, he nodded heavily:
"Okay, I'll go find them now."
Five minutes later.
Ye Guohong took several dormitory leaders to Chang Licheng's dormitory, but Chang Licheng's seat was empty:
"Old Chang, where are you?"
Soon, Chang Licheng’s voice came from the balcony outside the dormitory:
"Here, there, Lao Ye, bring everyone over to have a look!"
Ye Guohong looked at each other and several dormitory heads, and came to the balcony entrance one after another.
At this time, Chang Licheng was squatting on the ground in an Asian squatting posture, squinting, looking thoughtfully at the entrance to the bathroom.
When Ye Guohong saw this, a question mark appeared on his face:
"Old Chang, what are you doing? Are you going to imitate Lao Ba? It's not the same time, but it's the same toilet?"
"Get lost!"
Chang Licheng waved his hand at him angrily:
"I'm looking at cockroach poop!"
Ye Guohong's eyes couldn't help but look weirder when she looked at him:
"Cockroach shit? Your taste is even more important than Lao Ba's."
Chang Licheng returned the gesture with both hands, and then called everyone to come forward and relayed what Xu Yun told him.
Ten minutes later.
All details have been handed over.
Each dormitory leader was assigned a tube of glue bait syringe, and he went back to the dormitory and started using glue bait.
Chang Licheng took out two larger and thicker syringes and handed one to Ye Guohong:
"Lao Ye, take this thing, let's go wipe the tracks of the aisle and try to get it all done within half an hour.
Although this thing may not be useful, Assistant Professor Xu has helped us a lot. Let’s give out all the people in advance and leave the rest to fate! ”
Ye Guohong nodded, took the syringe, and followed Chang Licheng out to lay the gel bait.
Forty minutes passed.
Inside and outside the dormitories on the entire floor, all hidden corners where cockroaches left traces were filled with glue bait.
Everything is ready, all we need is the east wind. (End of chapter)