Cicadas live by sucking sap from plants, and they spend their lives being harmful to plants, a destroyer of trees and a pest without a doubt.

The robin survives by sucking the sap of the tree, and the adults crawl out of the ground to mate and lay their eggs on the young leaves and branches of the trees. After the eggs enter the branches, they will hinder the transportation of water and nutrients in the branches of the plant, which will cause a lot of dead branches.

In this respect, the robin is harmful to plants and can be considered a pest.

I. Cicadas, though harmful to trees, are at the same time food for certain birds.

Overcatching by human beings can cause a great decrease in the number of cicadas in that area. And people are eating the larvae that are still immature and mating and laying eggs, which can be fatal to the continuation of the species, and in turn, the survival of other creatures.

The growth and development of crops, dependent on climatic resources, subject to the influence and constraints of the climate, meteorological conditions are favorable, can promote the growth and development; on the contrary, unfavorable meteorological conditions, will slow down the growth and development. Various crops annual abundance and failure, to a large extent, determined by the comprehensive impact of meteorological conditions. Annual changes in light, heat, precipitation and other main factors, the performance of the cold and warm, drought and flood, wet and cloudy conditions, as well as the suitability of the relevant meteorological elements, is an important meteorological factor affecting the composition of the quality of crop yields.

Two, most of the cicada's life history is underground, parasitized on the roots of plants to suck sap. Therefore, from egg to larva to pupa is very safe, the death of individuals is rare. When it metamorphoses into an adult, it just mates to complete fertilization on the line, and then wait for death. The part that humans just grab by hand is very small. So the ecology of the above ground part should not have any significant impact, and the underground part of the no way to guess, may be the larvae will give some soil organisms, bacteria to provide nutrients, or which bugs of the intermediate host what, it is not good to go to the observation and experimentation, after all, in the underground more than 10 meters

In short, the robin is also a part of the food chain. If there is a massive decrease in a short period of time, it may also have an impact on the ecological cycle in the future, such as the overgrowth of poplar and willow trees, threatening the survival of other tree species, and some birds and small animals that feed on robins will also be reduced due to a lack of food. However, from the present point of view, the impact is not very great at this stage because, just as the economy will be subject to macro-control, if it does very much affect the situation of the entire ecological chain, the relevant government departments will certainly intervene. So in general, just cyclical local ecological impact. It will not cause a large-scale and prolonged impact