Coccophagus lycimnia

(Walker, 1839)

Coccophagus lycimnia is a minute in the Aphelinidae, widely used as a agent against soft scale insects (Coccidae: Hemiptera). The exhibits -size dependent oviposition , preferentially parasitizing second-instar scale insects while avoiding larger hosts due to defensive reactions. It has been documented attacking multiple economically important pests including Coccus hesperidum (brown soft scale), Parthenolecanium spp., Sphaerolecanium prunastri, and Parasaissetia nigra, with particular significance in citrus and agricultural systems.

Pronunciation

How to pronounce Coccophagus lycimnia: /kɒkˈkɒfəɡəs lɪˈsɪmniə/

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Identification

As a member of Aphelinidae, C. lycimnia can be distinguished from other chalcidoid by reduced wing venation with a relatively simple venation pattern, and from other Coccophagus by specific morphological characters of the , wing shape, and body proportions. Exact species-level diagnostic features require microscopic examination and comparison with type material or authoritative keys.

Distribution

Records indicate presence in Brazil (Rio de Janeiro), Argentina, Australia, Azerbaijan, and Belgium, suggesting a wide distribution including Neotropical, Australasian, Palearctic, and Nearctic regions.

Diet

-feeding occurs on honeydew and host tissues; larval development is endoparasitic within soft scale insects.

Host Associations

Life Cycle

Development is tied to instar; females oviposit preferentially in second-instar scale insects. The most common oviposition site is the filter chamber of the host. Hosts continue development after but die before maturity. Only one successfully develops per host despite occasional multiple oviposition events. Parasitoids emerge from mummified hosts.

Behavior

Females exhibit -size assessment before oviposition, preferentially selecting hosts in the 1100-1500 μm size range. Third instar and hosts are rejected due to defensive reactions including body shaking and covering with waxy secretions. Host-feeding occurs on hosts deemed unsuitable for oviposition.

Ecological Role

Primary and agent of soft pests in agricultural systems, particularly in citrus orchards and pine . Contributes to natural suppression of scale insect and reduction of honeydew accumulation and associated problems.

Human Relevance

Widely employed in classical and programs against soft pests. Documented use in citrus pest management and potential application in pine scale control. Reduces economic damage from scale including honeydew production and .

Similar Taxa

  • Other Coccophagus speciesCongeneric share similar associations and ; precise identification requires examination of microscopic characters
  • Other Aphelinidae parasitoids of scales such as Encyrtidae also contain ; Coccophagus is distinguished by specific wing venation and antennal structure

More Details

Host-size optimization

Laboratory studies demonstrate that C. lycimnia most frequently parasitizes Coccus hesperidum in the 1100-1500 μm size range, with 71% successful from 1400-1700 μm long. This represents second-instar hosts; larger hosts trigger defensive responses that prevent successful .

Oviposition site selection

The filter chamber is the most frequent oviposition site. While one to three may be deposited per , typically only one develops to maturity per host individual due to resource limitation and potential .

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