CPRT - Biological Approach Flashcards
A method of controlling pests that relies on predation, parasitism, herbivory, or other natural mechanisms.
Biological control
Refers to the beneficial action of predators, parasites, pathogens, and competitors in controlling pests and their damage.
Biological control
In plant diseases, biological control agents are most often referred to as _______.
Antagonists
In weeds, biological control agents include ________ and _________.
Herbivores and plant pathogens.
Biological control is an environmentally sound and effective means of mitigating pests and pest effects.
True or False?
True
Reduction in an organism’s or pest’s density due to natural enemies that occur without man’s intervention.
Natural Biological Control
Method that relies on natural enemies to reduce pest population to tolerable level and involve natural enemy manipulation by man.
Applied biological control
Mass production of BCA in the laboratory then later release in the field and create niche to promote establishment of the BCA in the field.
Applied biological control
Types of biological control
- Natural biological control
- Applied biological control
An organism that lives in or on another organism and takes its nourishment from that organism.
Parasite.
It is an organism that parasitizes a pest.
Parasite
Insect parasites are usually _______ than their host and have a __________ life cycle than their host.
smaller; shorter
Parasites kill their host.
True or False?
False
An organism that spends a significant portion of its life history attached to or within a single host organism in a relationship that is in essence parasitic.
Parasitoid
It is a natural enemy that parasitizes and ultimately kill their host.
Parasitoid
Kinds of parasitoids according to type of host insects
- Primary parasitoid
- Secondary parasitoid
- Tertiary parasitoid.
It is the parasitoid that is not considered beneficial.
Secondary parasitoid.
The tertiary parasitoid is not considered beneficial. True or False?
False.
Parasites that develop inside the host; associated with hosts in both concealed and exposed site.
Endoparasitoids
A parasitoid that lives inside a host and has nutritional requirements that allow multiple parasites to exist in the host’s body
Endogregarious parasitoid
A parasitoid that develops outside of host; typically associated with hosts in “protected” sites (i.e. tunnels, leafmines, rolled leaves)
Ectoparasitoids
Primary parasitoid of the eggs of
- Plodia interpunctella
- Corcyra sp.
- Ostrinia furnacalis
Trichogramma evanescens
Larval parasitoid of lepidopteran pests.
Apanteles spp.
Parasitoid of diamondback moth Plutella xylostella of cabbage.
Diadegma semiclausum
Parasitoid of Rice black bug eggs
Telenomus triptus
It is an organism that attacks other organisms by devouring them.
Predator
Predators are usually _________ or just _______ in size as the prey.
bigger; similar
Predators require (more, less) number of individual preys to complete its development.
Predators require more number of individual preys to complete its development.
Predatory insects are (non-beneficial, beneficial).
Beneficial
Examples of predators
- Lacewings
- Ladybugs (Coccinellid)
- Preying mantis
- Spiders
- Dragonfly
- Damselfly
A predator that prey on psyllids.
Curinus sp.
Microorganisms that can attack or cause diseases and may kill the pest host.
Pathogens
_________ are pathogens that attack plants and are considered pests.
Plant pathogens
Pathogens that attack pest are called ___________ and are beneficial pathogens from the biological control standpoint.
Biological control agents
Microorganisms that cause disease in insects.
Entomopathogens
Fungus vs. insect pest
Entomopathogenic fungi