Insects are fascinating organisms that amaze and surprise the man, for their different shapes, size, color, and also by the physical, morphological and reproductive adaptations made to meet environmental medium changes over time. One such strategy is adopting insects metamorphosis, a change of form through different cycles during their lifetime. Stages or cycles by passing insects during metamorphosis are egg, larva, pupa and adult.
Insects adopt colors and shapes to blend into the environment.
Sometimes the changes are very small from the young adult cycle, mainly the significant change is size. This phenomenon is known as simple metamorphosis occurs and, among others, bedbugs and planthoppers. In other cases, young people and adults are very different, both in form and in size and habits. This is known as complete metamorphosis and can be observed in flies, mosquitos and butterflies.
In simple metamorphosis insects have young individuals called nymphs are very similar to adults. If they are insects that have wings develop externally during the immature stages, there is no pupal stage before final height is reached.
The adaptability to the insect is a benefit to increase reproduction.
On the contrary, complete metamorphosis, has an intermediate stage before molting is the pupa or nymph in which the normally motionless insect, has an important transformation into the adult form, if they belong to a species with wings develop internally . They have habits and lifestyle in the larval cycle totally different to the adult stage. With this mechanism often overcome different adversities such as drought, heat, cold, this requires some internal changes in these very significant insects. During metamorphosis, these changes depend on the activity of these organs during different cycles. Thus, the heart, the nervous system and the tracheal system change very little. Others present crudely in the larva or nonexistent, develop into pupae to appear in adult individuals; Such is the case of the reproductive system.
When insects adapt to the environment, they breed more intensely and become pests.
The advantage of metamorphosis allows insects live in different environments and conditions and colonize diverse habitats, allowing evade some adverse situations. The larvae do not have much movement and dedicate their time to feed maximum energy accumulating instead adults can navigate much larger areas, this conditions make it more difficult pest control and elimination of these insects in the adult stage.