In my memory, the impression of the seven-star ladybird is not very good, but this is not about its appearance, but when it is touched, the unpleasant smell emitted from its body is similar to the odor released by the "stinky fart". Of course, now I understand that this is a means of self-defense for the Seven-Star Ladybird, and when it encounters an enemy attack, its foot joints will secrete an extremely unpleasant yellow liquid, causing the enemy to retreat because it can't stand it. In addition, it also has a set of death skills, when encountering strong enemies and dangers, it will immediately fall from the tree to the ground, shrink 3 pairs of thin feet under the stomach, lie down and pretend to die, and survive without the enemy.
In fact, the seven-star ladybird is a beneficial insect for humans, and its larvae and adult insects can prey on wheat aphids, cotton aphids, locust aphids, peach aphids, mesosomes, ticks, etc., which can greatly reduce the damage of trees, melon fruits and various crops from pests, and is known as "living pesticides". If a large number of aphids appear in the cotton field, the artificially cultivated seven-star ladybird can be put into the cotton field, and a ladybug can prey on 100-200 aphids a day, which can not only control the harm of pests, but also ecologically protect the environment.
The Seven-Star Ladybird is a predatory insect of the Coleoptera family Ladybird family, its body resembles a half-round ball, its head is black, its wings are orange-red, its antennae are short and not very pronounced, it has 3 pairs of thin feet, and its mouthparts have the ability to chew food. The reason why it has the name "Seven Star Ladybird" is because it has 7 black dots on its red elytra.
The seven-star ladybird goes through four different stages of development in its life: eggs, larvae, pupae and adults. The eggs are orange-yellow, long ovate, with pointed ends, and piled up on the back of the cotton leaf; the larvae are divided into 4 instars, and the body color gradually transitions from black to gray-black; the pupal is yellow, with the black molt of the terminally instar larvae. Seven-star ladybirds occur in 4-7 generations a year, with adults overwintering, often lying between the roots of wheat and rapeseed, and some hidden in the sunny soil blocks, soil crevices, the following April out of the sting, the adult lifespan can be up to 70 days.
For the seven-star ladybird, there is also a very interesting experiment: you use your finger to suddenly push off the seven-star ladybird that has just emerged from the pupal shell and stay motionless inside, scare it, and after more than a day, the seven-star ladybird's wing sheath gradually hardens, but the 7 round spots can never appear, thus becoming a "spotless" seven-star ladybird. As for the principle, it is not clear at present, perhaps it is frightened, affecting the secretion of a certain hormone in the body of the seven-star ladybird, resulting in round spots that cannot be revealed.
The next time you see the Seven-Star Ladybird, think about its benefits to humans, be kind to it, and treat it as a friend of humanity.