The economic importance of insects to agricultural production is huge. Some of them are benefits while few are harmful and there are lot factors threatening either existence or multiplication.
Dave Goulson of Sussex University, UK, said insects make up about two-thirds of all life on Earth but research recently has shown that there has been some kind of horrific decline.
“It appears that the earth is becoming vast tracts of land inhospitable to most forms of life, and are currently on course for ecological Armageddon. If we lose the insects then everything is going to collapse.”
The abundance of flying insects has plunged by three-quarters over the past 25 years, according to a new study that has shocked scientists.
Insects are an integral part of life on Earth as both pollinators and prey for other wildlife and it was known that some species such as butterflies were declining. But the newly revealed scale of the losses to all insects has prompted warnings that the world is “on course for ecological Armageddon”, with profound impacts on human society.
Lynn Dicks at the University of East Anglia, UK, and not involved in the new research said the work was convincing. “It provides important new evidence for an alarming decline that many entomologists have suspected is occurring for sometime.
“If total flying insect biomass is genuinely declining at this rate – about 6% per year – it is extremely concerning,” she said. “Flying insects have really important ecological functions, for which their numbers matter a lot. They pollinate flowers: flies, moths and butterflies are as important as bees for many flowering plants, including some crops. They provide food for many animals – birds, bats, some mammals, fish, reptiles and amphibians. Flies, beetles and wasps are also predators and decomposers, controlling pests and cleaning up the place generally.”