Chapter 55: Big mantis, its time to drink medicine
Considering the sporadic nature of the experiment, Xu Yun and others' first experiment used six culture containers, with a total of more than 500 cockroaches, densely packed and dark.
Looking at the cockroaches covering the inner wall of the culture container, Xu Yun suddenly had a picture he had imagined in his mind:
There is an invisible deep pit with tens of thousands of cockroaches living inside. A man loses his center of gravity and falls outside, and is then swamped by cockroaches...
Alas...
Xu Yun quickly dismissed this scene and returned his mind to the console.
Imidacloprid is a biological poison that acts on nicotinic acetylcholine receptors. Its operating principle is mainly to disrupt the transmission of chemical signals by interfering with the motor nervous system of pests, thereby killing the target from a physiological perspective.
As for its propagation principles, there are two types.
The first is to attract cockroaches through physically mixed gel bait. The chemical perception range of cockroaches is a full two hundred meters, so many cockroaches will come over to bite the poison when they smell it.
But after all, only a small number of cockroaches can be attracted in this situation. The real insecticidal effect of imidacloprid lies in the second category.
That is...
Cannibalism of cockroaches.
Yes, cockroaches will eat the corpses of their own species.
Live cockroaches like to eat the corpses and excrement of dead cockroaches, so when walking on the road, you can occasionally see some corpses of cockroaches with their tails or heads hollowed out. These are the remains left by cannibalism.
The spread of imidacloprid relies on this habit, but the number of generations that imidacloprid can act on generally does not exceed three generations, and dead cockroaches do not carry pheromones, so the effect of attracting similar species is limited.
At present, the best domestic imidacloprid gel bait for civilian use is Bayer's Baimeishi. It is expensive but very effective. A drop of gel bait the size of a rice grain can kill about 60 cockroaches continuously, and the number of generations is between two and two and a half.
In addition, the well-known Tibetan Fox teacher Xiaoliang once shared a recipe, which is boric acid powder, sugar and mashed potatoes.
The ratio of boric acid powder to sugar is 1:1, and there is an appropriate amount of potatoes so that they can be kneaded into a ball. Put a little in each corner and it is ready.
The main ones that work are boric acid powder, which can cause cockroaches to die from dehydration, sugar to attract cockroaches, and potatoes to knead them into balls.
The effect of this formula is also pretty good. You can basically see relevant comments below the boric acid merchants on Taobao. By the way, you can talk about water monkeys when you have nothing to do.
The gaze returned to the laboratory.
Bai Mushi is basically the ceiling of current broad-spectrum cockroach killers. There are products that can surpass its effectiveness, but it is difficult to achieve mass production.
However, the number of cockroaches that can be killed by a normal dose of Destroyer seems to be honest, but the prevention and control of large areas is just that. A small room of 30 square meters can be killed, but a large house of more than 100 square meters has to rely on the amount of money.
Went to fight.
Therefore, Xu Yun's goal is obviously not as simple as being at the same level as it.
After everything was ready, Xu Yun picked up the dropper and squeezed a fourth-generation imidacloprid gel bait onto each of the three small plates.
The other three small plates were filled with cockroach killers produced by Baijishi, Neon Kobayashi Pharmaceuticals, and KTTU insecticides produced by Maple Leaf Country, for comparison.
The gel bait is about the size of a grain of rice, translucent, and looks a bit like Voltaren cream.
The biological containers for the fourth generation imidacloprid gel bait are No. 1-3, and the latter three are No. 4-6.
Xu Yun and others then put the small dish into the bottom of the container through the lifting equipment of the container, and turned on the camera to observe the effect.
The first thing Xu Yun observed was the biological container marked No. 2, which was a 45X30X20 cuboid with some drinking water inside.
The cockroaches brought back from He Jiajia were very lively and kept crawling on the bottom and walls of the container. You can clearly see the leg hairs and slightly opened and closed wings of the American cockroach. It seems that if there is no container to block it, it will
Come and ride a flying dragon on your face.
The small dish containing the glue bait vibrated slightly when it came into contact with the bottom of the container. The cockroaches in the container suddenly became busy, but after more than ten seconds, the cockroaches gradually returned to normal.
Another ten seconds passed.
The chemical hybrid pheromones in the fourth generation imidacloprid began to disperse, gradually attracting three or four cockroaches, who soon began to eat the gel bait.
At the same time, the cockroaches in containers 4-6 remained unmoved, with only a few tentatively taking a few steps forward.
In container No. 2, several cockroaches that had eaten the gel bait retreated, and then a group of new members came up.
This situation lasted for three full rounds. In the container with the Destroyers on No. 4, a cockroach took its first bite.
It is clear.
It also contains pheromones, but the effects of chemical synthesis and physical mixture are completely different.
After a few more minutes, the cockroaches in box No. 6 officially gathered next to the gel bait.
Seeing this, Xu Yun looked at Zhou Peiyao and asked:
"Xiao Zhou, how long has it been?"
"It was officially launched for 26 minutes and 36 seconds. Box 1 consumed four rounds, Box 2 consumed five rounds, Box 3 consumed four rounds, Box 4 consumed two rounds, and Boxes 5 and 6 both consumed one round."
Xu Yun nodded and was about to give Zhou Peiyao a few words of encouragement when Ren Yongcun on the side suddenly said excitedly:
"Senior, look at box No. 2, this cockroach has reacted!"
Xu Yun quickly stepped forward and looked along Ren Yongcun's direction.
It was an American cockroach about four centimeters long. At this time, the cockroach was leaning against the wall of the container, its tentacles were swirling rapidly, its wings were spread to the maximum extent, and it looked very excited.
Then another twenty minutes later, the American cockroach could no longer stand on the wall of the container. Its supporting legs gave out and fell to the bottom of the container on its back.
Although it turned over quickly, judging from the speed at which it got up, it was obvious that there was something wrong with its motor nerves.
as expected.
More than ten minutes later, the giant mantis suddenly turned over and its six legs began to dance feebly in the air.
More importantly...
Due to problems with the motor nerves, the binding proteins in the cyclic pheromones that have penetrated deep into the bone marrow begin to react with the pheromone receptors on the surface of the olfactory receptor neurons, tissue expression begins to be disordered, and a large amount of pheromones begin to diffuse.
In the next twenty minutes, a large number of male cockroaches gradually gathered around this female American cockroach, which seemed to be extremely excited and full of sex.
However, due to the special circumstances of some first generation bodies, many male cockroaches did not start multi-person sports.
The female American cockroach completely lost all signs of life in the presence of countless similar species, and then...
