Intro to Entomology; WEEK 6 Notes
Intro to Entomology; WEEK 6 Notes ENTO 2010
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This 3 page Class Notes was uploaded by Bethany on Sunday March 13, 2016. The Class Notes belongs to ENTO 2010 at University of Georgia taught by Espelie in Spring 2016. Since its upload, it has received 26 views. For similar materials see Insects & the Environment in Entomology at University of Georgia.
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Date Created: 03/13/16
Intro to Entomology Week 6 Notes Order: Hemiptera hemi = half; ptera = wings Common Names: “true” bugs; Scale insects; Cicadas; Spittlebugs Species: 68,000 Hemiptera Incomplete Metamorphosis Have piercing, sucking mouthparts Are pests to crops Can transmit disease “True” Bugs Their mouthparts, or “beaks,” swing forward. Many species are predators. Base of forewing is hardened. Back of forewing is membranous. Many of them have stink glands. Assassin Bug Has piercing, sucking mouthparts Hemiptera Bed bugs feed at night. Bed bugs inject an anesthetic while feeding so that their prey do not feel their presence. Bed bugs suck on human blood. Vector: a means of biological transfer. Human Diseases (You Must Know!) The common name of the disease. The scientific name of the disease agent. Disease agent: what type of organism it is, such as either a protozoan, bacterium, or a virus. The Arthropod vector Chaga’s Disease Vector: Assassin bug, aka the Kissing Bug Disease: Trypanasoma cruzi (a protozoan) One million people die per year to this disease. The disease is primarily high in South America. The disease attacks the heart. It is hard to diagnose, with virtually no cure. Its reservoir hosts are opossums and armadillos. Spread of Chaga’s Disease Kissing Bug feeds on the victim at night. Kissing Bug then defecates on victim’s face. The victim rubs feces unknowingly, and the Trypanasoma get into their wound. Intro to Entomology Week 6 Notes Xenodiagnosis of Chaga’s Disease Killer bugs feed on a patient inside a controlled laboratory. Ten days later, the researcher will look for Trypanasoma in the Killer bug’s feces. Xenodiagnosis: use of a live vector to diagnose a disease. Aphids Their mouthparts, or “beaks,” swing down. They’re plant eaters. Have membranous wings. They are major agricultural pests. Aphids Aphids have many predators. Aphids give birth to nymphs. Plant defense: sticky hairs Aphids are usually wingless. Overpopulation of aphids results in winged aphids. Honeydew: a sweet, sticky substance excreted by aphids. Honeydew Production by Aphids Honeydew allows for water excretion. Honeydew attracts ants that drink it. Honeydew can cause fungal growth. Interesting Fact: Some Bible reviewers thought that manna was actually honeydew. Aphids They have piercing, sucking mouthparts. They are tended by ants for their honeydew. Scale insects have scales on their wings, hence their name. Order: Coleoptera coleo = sheath; ptera = wings Common Names: Beetles; Weevils; Ladybugs; Fireflies Species: 300,000 Coleoptera Have complete metamorphosis Have chewing mouthparts Their forewings are hardened. Their hind wings are membranous. Have a thickened exoskeleton They are pests to crops and trees. They are the largest insect order. Complete Metamorphosis: Egg Larva Pupa Adult Intro to Entomology Week 6 Notes These Four Stages in Complete Metamorphosis Often Vary in: Appearance Habitat Hosts they feed on Their predators and parasitoids Ladybugs Ladybugs lift up their front wings and fly with their hind wings. Ladybugs are beneficial. Fireflies Each species has a unique flash pattern. Males flash to attract females. Then, the female will flash in response. Males and females have different flash patterns. Some females mimic flash patterns of females from other firefly species in order to prey on their males. Firefly larvae are aposematic; they glow to deter predators. Fireflies They produce light with Luciferin, a pigment which yields light when combined with oxygen. 98% of their energy is released as light.