Deraeocoris

Kirschbaum, 1856

Species Guides

Deraeocoris is a of predatory plant bugs in the Miridae, comprising at least 210 described . Members of this genus are recognized as important agents in agricultural and horticultural systems, feeding on pest arthropods including mites, aphids, and psyllids. Several species have been documented in orchard , particularly in apple and pear production. The genus exhibits variation in plant associations and developmental rates depending on substrate and prey availability.

Deraeocoris davisi by (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick. Used under a CC-BY license.

Deraeocoris by (c) katunchik, some rights reserved (CC BY), uploaded by katunchik. Used under a CC-BY license.

Deraeocoris by (c) Katja Schulz, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Deraeocoris: //dɛˌɹiːoʊˈkɔɹɪs//

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

Images

Habitat

occur in diverse environments including commercial orchards (apple, pear), ornamental plantings, and natural vegetation. Documented plants include Crataegus (hawthorn), pear, apple, bean, eggplant, and silver fir. Some species overwinter as on woody plants. Urban and suburban parks have been identified as for expanding in northern Europe.

Distribution

Widespread distribution with records from Europe (Denmark, Norway, Sweden, United Kingdom), North America, and other regions. Specific show range expansion patterns, with D. lutescens documented as a recent southern immigrant to Sweden. D. olivaceus has shown measurable distribution increase in Britain over decadal timescales.

Seasonality

timing varies by : D. olivaceus usually becomes adult during July. D. brevis shows two per year in pear orchards. Seasonal distribution patterns differ between orchard and non-orchard .

Diet

Predatory feeding on pests. Documented prey includes: pear psylla (Psylla pyricola) and nymphs; carmine spider mite (Tetranychus cinnabarinus); European red mite (Panonychus ulmi); aphids. D. brevis piceatus consumed nearly 400 eggs and nymphs during development from first instar to .

Host Associations

Psylla pyricola - preypear psylla
Tetranychus cinnabarinus - preycarmine spider mite
Panonychus ulmi - preyEuropean red mite
Crataegus - hawthorn
Pyrus - pear
Malus - apple
Phaseolus vulgaris - bean
Solanum melongena - eggplant
Abies alba - silver fir

Life Cycle

Overwinters in the stage on woody plants. Two per year documented for D. brevis in pear orchards. Nymphal developmental time varies by host plant and : D. brevis piceatus requires approximately 25 days from first instar to adult under laboratory conditions; D. pallens nymphal development ranges from 15.89 days on eggplant to 19.97 days on bean.

Behavior

Predatory targeting pest arthropods. Collected by beating vegetation in survey methods. Developmental rate and mortality vary significantly depending on plant substrate.

Ecological Role

of agricultural and horticultural pests, particularly mites and psyllids. Functions as a agent in programs for orchards and ornamental plantings.

Human Relevance

Valued as agents in commercial apple and pear orchards. Susceptibility to varies: are highly toxic to direct application but moderately toxic as 7-day-old residues; nonphosphate pesticides allow fair to good survival but may not integrate into summer pest control programs. Pesticide selection affects conservation of these in agricultural systems.

Similar Taxa

AnthocorisBoth are predatory mirids used in and co-occur in orchard ; distinguished by morphological features of the genus Deraeocoris versus Anthocoris
PinalitusCo-occurs on woody plants; Pinalitus atomarius is phytophagous rather than predatory, associated with conifers, allowing ecological separation from predatory Deraeocoris

More Details

Taxonomic note

D. lutescens and Pinalitus atomarius were previously mistakenly listed from Sweden in the World catalogue of Miridae by Schuh (1995) before verified records were established.

Research limitations

Most detailed biological studies focus on individual (D. brevis, D. pallens, D. nebulosus, D. olivaceus, D. lutescens); -level generalizations should be made cautiously.