#三农知识分享家 #
On summer nights, you can often see this insect, with long tulle-like wings, flying in a very elegant posture, quite fluttering feeling.
However, this is not a dancing boy who lingers among the flowers, nor is it a pure love girl in white, but a killer of Mo de feelings.
Its scientific name is Chrysopa pallens, and it is a natural enemy of a variety of pests, including aphids, leaf mites, thrips, and lepidoptera larvae such as the grass moth that we recently smelled.
It belongs to the completely metamorphosed insects, the larvae and adults look completely different, its larvae are like this.
The larvae of the grasshopper have another nickname called aphid lion, and the word "lion" fully reflects their brave eating posture. A single larva can eat hundreds of aphids a day.
There is also a characteristic of the grasshopper that makes it more suitable as a natural enemy insect, many natural enemy insects are larval stage fierce tiger, once they become insects, the mouth organ degenerates, it will only dance among the flowers. But unlike the large grasshoppers, they have wings in the adult stage and are more efficient in their predation.
The mouthparts of adult grasshoppers are a bit similar to dragonflies, and they are both chewy, so it is not a problem to eat a bug or something.
Generally from April to October of each year, it is the period with the highest density of grasshoppers, and this period is also a critical period for crop growth to harvest.
When the ambient temperature is lower than 10 °C, they will enter a significant stage of developmental stagnation, and above 15 °C, their growth and life are very normal.
Grasshoppers can breed three times a year, and after mating, females can lay about 1,000 eggs at a time, and their eggs are attached to the back of the leaves with filaments, which look like a unique flower. Some Korean experts have also mistook these little beings for Utan Borneo.
After hatching, the larvae begin to enter the rhythm of eating and eating, during which they will molt several times, after the third instar, the larvae begin to prepare for pupal, the larval stage and the pupal stage are about two weeks, the adult life and temperature are related, the higher the temperature, the shorter the lifespan, but the general life expectancy is more than two months.
Grasshoppers are sensitive to environmental factors and the tolerance to various agents is not too high, so when removing insects in farmland, it should be avoided as much as possible.
Grasshopper farming has become an industry, and batch stocking of eggs and larvae has a significant effect on effectively inhibiting and reducing farmland pests.
Summary: Grasshoppers are our best friends, when you encounter them, don't hurt them, say hello to them.
Thank you for watching.
Research progress and prospects of the natural enemy insect Giant Grasshopper
Authors: Li Shu; Wang Jie; Guo Xiaojun; Tian Renbin; Wang Su; Zhang Fan; Title: Journal of Environmental Entomology
A study on the predatory potential of the grasshopper
Author:Xu Qingxuan; WANG Song; TIAN Renbin; WANG Su; ZHANG Fan; Ma Jiao; LI Shu; DI Ning; Journal of Environmental Entomology
Agroforestry composite environment large grasshopper habitat selection orientation and natural enemy efficiency
Authors: Yang Zhao; Zhao Guangliang; Yan Guozeng; Zhou Zaibao; Tian Zuobao; Wei Wanhong; Zhang Dong; Li Kai Title: Acta Ecologica Sinica
Biological characteristics and artificial reproduction of the large grasshopper
Author: Liang Rong; Shan Xinbei Title: Modern Agricultural Science and Technology