Anthocoris confusus

Reuter, 1884

minute pirate bug

Anthocoris confusus is a minute pirate bug in the Anthocoridae. It is a predatory that feeds on aphids and other small arthropods on deciduous trees. The species has been studied extensively for its searching and its effectiveness as a agent of pests.

Anthocoris confusus (Anthocoridae sp.), Elst (Gld), the Netherlands by Bj.schoenmakers. Used under a CC0 license.

Anthocoris confusus (Anthocoridae) - (imago), Elst (Gld), the Netherlands - 2 by

This image is created by user B. Schoenmakers at Waarneming.nl, a source of nature observations in the Netherlands.
. Used under a CC BY 3.0 license.

Anthocoris confusus (Anthocoridae) - (imago), Elst (Gld), the Netherlands by

This image is created by user B. Schoenmakers at Waarneming.nl, a source of nature observations in the Netherlands.
. Used under a CC BY 3.0 license.

Pronunciation

How to pronounce Anthocoris confusus: /ænˈθoʊkɔːrɪs kənˈfjuːsəs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Habitat

Lives on various deciduous trees including willow (Salix), beech (Fagus), maple (Acer), linden (Tilia), oak (Quercus), hawthorn (Crataegus), elm (Ulmus), poplar (Populus), and ash (Fraxinus). Oviposits preferentially on young, fully turgid plants rather than older, more flaccid ones.

Distribution

Europe and Northern Asia (including China and Japan), and North America. Distribution records confirm presence in Europe & Northern Asia (excluding China), North America, and Belgium.

Diet

Feeds on aphids, including Thelaxinae, Psylloidea, and . Preys on Aulacorthum circumflexus in laboratory studies. Maximum production occurs when fed eight Aulacorthum circumflexus per day; prey densities below six result in marked decline in egg production.

Host Associations

Salix (willow) -
Fagus (beech) -
Acer (maple) -
Tilia (linden) -
Quercus (oak) -
Crataegus (hawthorn) -
Ulmus (elm) -
Populus (poplar) -
Fraxinus (ash) -
Aulacorthum circumflexus - preyLaboratory prey for oviposition and studies
Drepanosiphum platanoides (sycamore aphid) - preyEvaluated as in studies; requires minimum of 14 small aphids per 10 dm² leaf for successful establishment

Life Cycle

Develops through and nymphal stages. Females oviposit on plant parts supporting highest densities to increase survival probability of emerging nymphs. First and second instar nymphs search for prey on broad bean plants.

Behavior

Females exhibit area-restricted search : frequency of turning movements increases following feeding, concentrating search in small areas where prey are clumped. If no prey encountered within 5–8 minutes, search track straightens out. First and second instar nymphs move faster on undersides of leaves, the sites most likely to support . Nymphs spend considerable time in inactive periods.

Ecological Role

of aphids and other small arthropods. Evaluated for potential against sycamore aphid (Drepanosiphum platanoides). Effectiveness as biological control agent limited by minimum prey requirements: establishment requires at least 14 small aphids per 10 dm² leaf. Proportion of population killed decreases as aphid abundance increases.

Human Relevance

Studied as a potential agent for pests, particularly the sycamore aphid. Its effectiveness is limited by -dependent factors and prey distribution patterns.

Similar Taxa

Anthocoris nemorumCongeneric with similar ; both evaluated as of sycamore aphid. A. nemorum requires lower minimum prey (5 small aphids per 10 dm² leaf) compared to A. confusus (14 per 10 dm²) for establishment.

More Details

Searching behavior and plant topography

Plant surface topography strongly influences search pattern. First and second instar nymphs move faster on leaf undersides where aphids are most likely to occur. The underlying trend of area-restricted search after feeding is advantageous for seeking colonial prey.

Reproductive ecology

Low prey densities result in reduced and shortened oviposition period. Females distinguish between young and old plants, preferentially ovipositing on younger plants so eggs develop before plant .