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Questions and Answers
Why are insect predators larger than their prey?
What distinguishes nocturnal insect predators from parasitoids?
How do juvenile predators differ from adult predators in their use of prey?
What is a significant difference between insect predators and parasitoids in terms of feeding habits?
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What knowledge is essential for biological control using predator complexes?
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Which arthropod predator is the most abundant in crops?
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What is the primary food source for Euborella annulata?
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Which insect has relatively larger eyes compared to other ant species?
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What type of prey does Chrysoperla carnea predominantly feed on during its larval stage?
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Which insect can consume up to 30 individual preys per day?
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What is the primary food source for Solenopsis geminata?
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Adults of which insect feed on nectar, pollen, and honeydew?
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What is the primary prey of the carabid beetle Ophionea nigrofasciata?
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Which characteristic is true of the cricket Anaxipha longipennis?
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What is the common name given to the insect Rodolia cardinalis?
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Which of the following insects is not from the order Orthoptera?
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What was the major pest in California that the predator Rodolia cardinalis was imported to control?
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Based on the information given, which insect feeds on multiple types of prey?
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Study Notes
Predatory Earwig
- Euborella annulata is a generalist predator that preys on leaffolder and stemborer larvae.
- Can consume 20-30 prey daily.
- Its prey includes Asian corn borer, corn earworm, aphids, leafhopper, and other small insects.
Red Ant
- Solenopsis geminata, also known as the Red ant or Red fire ant, has 10-segmented antennae with 2-segmented clubs.
- Has relatively larger eyes compared to other ant species.
- Preys on leafhoppers, planthoppers, bugs, and moths.
Green Lacewing
- Chrysoperla carnea is a predator that feeds on nectar, pollen, and honeydew as an adult.
- Larvae are predatory and feed on soft-bodied arthropods.
- Preys on aphids, caterpillars, insect eggs, flea beetles, armyworms, and other small insects.
Insect Predators
- Insect predators are larger than their prey and require more than one prey item to complete development.
- Unlike parasitoids, some insect predators are nocturnal.
- Predators affect all pests in all habitats to some degree.
- Juvenile predators use prey for growth, while adults use prey for maintenance and reproduction.
- Adults usually continue to feed as adults, where ingested prey contributes to egg production in females.
Spiders
- Class Arachnida, Sub-Class Araneae, are the most abundant arthropod predators in crops.
- Have a cephalothorax (head and thorax combined) and an abdomen with different structures.
- Individuals consume 20-40 prey per day.
- Preys on coconut scale insect, armored scale, and other small insects.
Ground Beetle
- Ophionea nigrofasciata, also known as the Ground Beetle, is a reddish brown insect with a bluish band on the elytra.
- Preys on leaffolder larvae and planthoppers.
- Can prey on 3 to 5 larvae per day.
Classical Biological Control
- The Vedalia beetle, also known as the ladybird beetle, was used in classical biological control in 1888.
- It was imported from Australia to control the cottony cushion scale, a major pest in California.
Crickets
- Anaxipha longipennis, also known as the Cricket, is a brown insect with yellow head, thorax, wings, and legs.
- Has a distinctive anal mirror or ringed pattern in the male adult.
- Preys on small insects.
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Description
Learn about Euborella annulata, a common predatory earwig that preys on rice pests like leaffolder and stem borer larvae. Discover its feeding habits and the variety of prey it consumes daily.
