Slide1 :
Overview : Overview Characteristics
Evolution
Hibernation
killer insects
Questions
Slide3 :
Head : Head Thorax Abdomen The head is the anterior of the three body regions of an insect. It bears the eyes (usually a pair of compound eyes), the antenna and the mouthparts.
The thorax is the middle of the three body regions of an insect. It is composed of 3 segments. It bears 3 pairs of legs(one on each segment) and usually 2 pairs of wings. Some insects have only 1 pair of wings, others have none.
The abdomen is the posterior of the three body regions of an insect. It is composed of 11 segments. The abdomen bears the external genitalia of the insect. In female insects these consist of an ovipositor.
Slide5 : All living things are placed into groups depending on common characteristics. The animal kingdom is informally divided into two groups, the vertebrates and invertebrates. Invertebrates are a group of animals that have no backbone, unlike animals such as reptiles, amphibians, fish, birds and mammals who all have a backbone
There are four stages all insect goes through in their life : There are four stages all insect goes through in their life EGG LARVA PUPA ADULT
Slide7 : Egg: Insects lay fertilized eggs singly or in clusters. At this stage, vulnerability to chemical control is minimal. The egg has a protective covering. These clusters of eggs often are enclosed in a protective material. However, egg clusters can be removed and crushed. Eggs may be laid in protected, hidden locations to avoid exposure to weather and predators.
Larva: When an egg hatches, the larva emerges. Larvae are the feeding, growing, nonreproductive stage of development. During this stage, most insects go through a process called molting. Instead of gradually growing larger, the larva eats until its skin cannot expand any further. The old skin splits and is shed. The stage between each molting is called an instar.
Pupa: is a non-feeding, transforming stage. This stage may form a kind of covering, such as the cocoon or chrysalis made by the butterfly. During this stage the insect transforms into the adult stage, often an entirely different form from the larva. At this stage, the only possible control is mechanical, such as crushing.
Adult: Adults are the reproductive stage of insects. They may or may not feed. Some live for a very brief period, even one day or less. Control is possible during this stage of development but usually is more difficult. It is critical to control pests before they reproduce a new generation.
EVOLUTION : There is an important factor that govern the evolution of insects - their molting, that lead to their capability of transformation of body, and adapt to change. By molting, insects in different stage can have different shape to make them suitable for their different living environment. Where there is the new habitat, insects are usually the first group of animals to occupy the habitat. Insects are the first animal to fly.
EVOLUTION
The Cambrian Period 543 to 490 Million Years Ago : The Cambrian Period 543 to 490 Million Years Ago The first known record of insects was found in the middle of the cambrian period. The Cambrian Period marks an important point in the history of life on earth, it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion", because of the relatively short time over which this diversity of forms appears. It was once thought that the Cambrian rocks contained the first and oldest fossil animals, but these are now to be found in the earlier vendian strata
HIBERNATION : Many insects overwinter in a dormant state. They can be in any stage of development — egg, larva, pupa, or adult. Insects spend the winter in soil or dead plant material. Rough tilling of the soil can expose the insect to fluctuating temperatures that may kill it. Removal and disposal of plant debris also may eliminate overwintering insect stages.
HIBERNATION
MOSQUITOES : The deadliest creature on earth, the anopheles mosquito, is responsible for more than 300 million cases of malaria each year, and causes between one and three million deaths. Malaria affects 10% of the world’s population, making it the leading mosquito-borne disease. The 3,000 species of mosquito, including some 200 in North America, do not all carry the same diseases. Mosquitoes can also carry dengue and yellow fevers, encephalitis, elephantiasis, and canine heartworm. MOSQUITOES
KILLER BEEZ : There are 20,000 species of bee, including social, solitary, and parasitic. Bee attacks generally occur when people stumble into a nest or otherwise provoke bees. Africanized honeybees, also known as ‘killer bees,’ are an exception. They were created when African bees were brought to Brazil in 1956 to breed a better honeybee. The effort failed and the bees escaped. They have killed 1,000 people as they have moved north through Central
America to the southwestern U.S. The aggressive Africanized bees deliver a nightmarish, agonizing death by swarming all over their victim. In the Southwest, they have killed animals as large as horses. KILLER BEEZ
Black Death : Bedbugs, parasitic worms, and fleas are also leading killers of humans. Fleas spread by rodents cause plague. In the 14th century, plague killed three-quarters of the population of Europe. Plague is rare today and can usually be treated Black Death
GUESTIONS : GUESTIONS