Harmful Aspects of Insects Pests of our crops

Harmful Aspects of Insects:

Pests of our crops: Insect are the biggest competitors of human beings. About 30 -50 % of our food (crops, fruits and vegetables) are destroyed and eaten by insects. Insects not only decreases the yield of our crops and orchards but also gave irreversible damage to our plants by causing different diseases in them. Butterflies and moths and their catterpillars Beetles and their grubs (larvae of beetles) Aphids Bugs

Vectors of diseases: Insects also act as a vectors for transmitting different diseases in human beings as well as in our cattle, poultry etc Aedes is a vector of dengue Anopheles is a vector of malaria (Plasmodium) Culex is a vector of yellow fever Sand fly is a vector of Leishmenia

Insects in spreading of diseases: Different insects also spread diseases in human beings like: House flies Cockroaches They can cause diarrohea, dysentery etc

Destroy our households: Different insects also destroy our household items like: Termites destroy our furniture, door, windows, books etc Silver fish an insect feed on paper and destroy our important documents and literature. Termites and silver fish has destroyed very important literature of science and technology in old times.

Source of nuisance: Insects are also a source of nuisance for human beings Mosquitoes produces itching and allergic response Sting of bees and wasps causes inflammation, allergy and itching.

Insects can cause famine: Locusts have produces famine in various regions of the world at different times of history.