In this article we will discuss about the economic importance of insects. Some insects are useful to man, while many are harmful and le injury is to such an extent that it has threatened the existence of man on this globe. For both the reasons, insects are of great economic importance and its study constitutes the subject matter of entomology, [...]
The following points highlight the two beneficial insects for us:- 1. Silk Moth 2. Lac Insect. Beneficial Insect # 1. Silk Moth: The silk moths are related to butterflies and belong to the order Lepidoptera. From the very ancient times, these insects are well-known for the ability to produce silk. The rearing of silkworm for silk originally started in China, [...]
In this essay we will discuss about Cockroach. After reading this essay you will learn about: 1. Habitat and Habits of Cockroach 2. Morphology of Cockroach 3. Anatomy 4. Endoskeleton 5. Digestive System 6. Digestive Glands 7. Heart 8. Respiratory System 9. Mechanism of Respiration 10. Excretory System 11. Nervous System 12. Endocrine System 13. Sense Organs 14. Compound Eyes [...]