General Pest Flashcards
What is Toxicity?
a measure of how inherently poisonous a chemical is when inhaled, eaten, or absorbed though the skin of a living organism
Acute effects (toxicity)
Potential adverse effects from a chemical after a short exposure
What is LD50
Lethal dose of a compound needed to kill 50% of a population of test organisms. The higher the LD50, the lower the toxicity.
Chronic toxicity
The delayed adverse effects of doses over an extended period of time
What is on the head of an insect?
the eyes, antennae and mouthparts (eating and sensing)
What is on the thorax of an insect?
this is the middle segment containing legs and wings (movements)
What is on the abdomen of the insect
this is the 3rd and final segment containing sex organs, hairs or bristle like extensions called cerci (reproduction and digestion)
What type of skeleton do insects have
an Exoskeleton (a firm outer covering to which internal muscles are attached) made of Chitin.
What are antennae used for?
these are usually segmented sense organs. They are used for navigation, food location, communication, mate location, and in some cases grasping
what kind of mouthparts do immature lice have?
the same as their adult form, piercing-sucking mouthparts because they develop through incomplete metamorphosis
name the 6 types of adult insect mouth parts
- chewing (roaches, termites) 2. chewing-lapping (bees and wasps) 3. piercing-sucking (mosquitos, fleas, lice) 4. rasping-sucking (thrips only) 5. siphoning (moths, butterflies) 6. sponging (house flies, fruit flies)
What are spiracles?
2 small slit like openings on either side of the thorax in primitive insects like cockroaches. in other types of insects they are present on the abdomen. They are external openings to the respiratory system. How insects breathe
what are the male and female reproductive organs in insects
Males- claspers. Females-ovipositor. they may be present internally or externally and often distinguish species from one another
What is molting?
a process of getting rid of the outer layer of the exoskeleton and replacing it with a new one. This is how insects grow
Are all members of a species actively involved in reproduction?
no, many population of social insects (i.e. bees, ants termites) are predominantly non-reproductive females (workers) that only produce offspring under certain conditions
What is a CSI? (Chitin Synthesis Inhibitor)
a type of IGR that targets the chitin. Chitin Synthesis Inhibitor. chitin makes up 50% of the insects exoskeleton. These types of IGRs do NOT allow molting and the insect dies
Insect molt from one developmental stage to another. These developmental stages are called?
Instars. Only the final Instar can reproduce.
Define Ametabolous and give examples of insects who develop this way.
“Without Metamorphosis” silverfish and firebats. The different instars share similar traits.
Define Hemimetabolous and give examples of insects who develop this way
“Gradual Metamorphosis” cockroaches, termites, earwigs, crickets, bedbugs, and lice. 3 stages: Egg, Nymph and Adult. The different instars share similar traits but the adult form is more distinctive.
Define Holometabolous and give examples of insects who develop this way
“Complete Metamorphosis” flies, fleas, beetles, moths, ants, wasps and mosquitos. 4 distinct stages, egg, larvae, pupa and adult.
What is an arachnid (classification arachnida)?
2 body sections. cephalothorax (head and thorax joined together) and an abdomen. Spiders, Mites and Ticks fall in this category. They are NOT insects. Chelicerae mouth parts instead of mandibles.
What is an insect (classification insecta)?
3 distinct body regions. Head, thorax and abdomen
What are the 3 types of metamorphosis?
Ametabolous, Hemimetabolous, and Holometabolous
what is a biopestcide
A bacteria or virus, not synthetically derived, used to kill certain insects. Bt (Bacillus thuringiensis) Mostly used in Agriculture and forestry