In nature, there is the speed of lions preying on antelope, there is the competition between cattle and sheep for food of grass, there is the symbiosis of rhizobia and legumes, and there is an interspecific relationship between organisms, and one organism lives on another organism, that is, parasitism. When it comes to "parasitism", I believe that the first thing that comes to mind is the parasites that parasitize people's bodies, which generally only affect the health of the host and will not endanger the life of the host. And then there are some parasites who will kill the host without mercy, that is, fierce - parasites.
<h1 class= "pgc-h-arrow-right" > a clematis that can control the host</h1>
Clematis, also known as hair-shaped snakes, belongs to the order Clematis, Family Sylvestris. Clematis are mainly found in temperate and tropical zones, they can live in the water and lay eggs in the water, generally live in the wild streams, as long as there are small insects to drink, it is likely to be parasitic, if the small insect is preyed by large insects, they parasitize to large insects. When the clematis are adults in the host, they will control the host to find a nearby water source, and when they are close to the water source, they will drill out of the host's body and return to the water to mate and lay eggs, starting the next cycle.
Clematis are so terrifying, will that infect humans? The answer is yes. But they can't control humans like insects, they only infect the human digestive tract and bladder, causing abdominal pain, diarrhea, urinary pain and other symptoms. The best way to prevent clematis is not to eat raw food and not to swim in unfamiliar waters in the wild.
<h1 class= "pgc-h-arrow-right" > pest "killer" parasitic bee</h1>
Parasitic wasps are collective names for species such as small bees, red-eyed bees, and chick bees, and belong to the suborder Membranoptera. These parasitic wasps lay their eggs on the surface or outside the body of some caterpillars or other insects. When they "commit murder", they will paralyze the victim and make them unable to move, at which point the eggs laid by the parasitic bees will be relatively safe. After their eggs hatch into larvae in the host, the host is like a "living granary" for the larvae to nibble on until they are "hollowed out".
Because the hosts of various parasitic bees are more specific, parasitic bees can be used for biological control. For example, corn borers are agricultural pests that greatly affect the yield of corn. The main parasitic object of the red-eyed bee is the corn borer, and the purpose of controlling the corn borer can be achieved by releasing the red-eyed bee.
<h1 class= "pgc-h-arrow-right" > double-disc flukes that "lure" birds</h1>
Diplodocus belongs to the order Diplodocus, they can also control hosts, and their control ability is better than that of clematis. Double-disc flukes initially parasitize the snail' body, they invade the snail's eye handle, and the eye handle can constantly expand and jump, like a colorful caterpillar. Birds will be attracted by its bright colors after seeing this "caterpillar", and if the birds prey on this "delicacy", the double-plated fluke will parasitize the bird's body and begin to eat the bird's flesh. Double-disc trematodes multiply in the internal organs of birds, and the eggs are excreted through the bird's feces and returned to the ground, where they are eaten by snails and then begin a new cycle.
They use the lives of other creatures to maintain their survival, which can be described as a veritable ruthless "killer". But some parasites can help humans control pests, as long as they are used rationally, even the most terrible "killer" can become a good helper for humans.