Anagyrus

Howard, 1896

Species Guides

Anagyrus is a large of parasitic in the Encyrtidae, containing at least 247 described distributed worldwide. These wasps are specialized primarily targeting mealybugs (Hemiptera: Pseudococcidae), with several species commercially important for of agricultural pests. The genus includes notable species such as A. pseudococci, A. lopezi, and A. vladimiri, which have been extensively studied and deployed for managing mealybug in crops including cassava, citrus, and grapes. A subgenus, Nesoanagyrus, was established by Beardsley in 1969.

Anagyrus by no rights reserved, uploaded by Jesse Rorabaugh. Used under a CC0 license.

Anagyrus kamali by the Smithsonian. Used under a CC0 license.

Anagyrus aegyptiacus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Anagyrus: /ˌænəˈdʒaɪrəs/

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

Identification

Anagyrus are small chalcidoid wasps typically 1-3 mm in length. They possess the characteristic features of Encyrtidae: reduced wing venation with a distinct linea calva (bare area) on the forewing, geniculate (elbowed) , and often a metallic coloration. Species-level identification requires examination of microscopic characters including antennal segmentation, mandibular , mesoscutal , and ovipositor structure. The can be distinguished from related encyrtid genera by combinations of characters including the number of antennal segments, presence or absence of spurs on the middle tibia, and details of the propodeal structure. Identification keys exist for regional faunas but global keys remain incomplete due to the large number of species.

Images

Distribution

Worldwide distribution, with records from all major biogeographic regions including North America, South America, Europe, Africa, Asia, and Oceania. Specific distribution records include: Bolivia, California (USA), Hawaii (USA), Karnataka and Kerala (India), Indonesia, Argentina, and Puerto Rico. The appears to be most diverse in tropical and subtropical regions where mealybug are abundant.

Host Associations

Phenacoccus manihoti - for A. lopezi, a specific used in of cassava mealybug
Planococcus ficus - for A. pseudococci, used in of vine mealybug in vineyards
Planococcus citri - for A. pseudococci and other Anagyrus in citrus
Maconellicoccus hirsutus - for A. kamali, used in of
Pseudococcus viburni - for various Anagyrus in California
Hypogeococcus spp. - for A. cachamai and A. lapachosus, of Harrisia cactus mealybug
Phenacoccus aceris - for A. schoenherri, apple mealybug

Ecological Role

Anagyrus function as primary of mealybugs, playing significant roles in natural and programs. Several species have been successfully introduced as agents across multiple continents. The contributes to suppression of mealybug in agricultural , particularly in cassava, citrus, grape, and cactus systems.

Human Relevance

Multiple Anagyrus are commercially important agents. A. lopezi was successfully introduced to Africa and Asia for control of the cassava mealybug, with documented economic benefits exceeding billions of dollars. A. pseudococci is widely used against vine mealybug and citrus mealybug in Mediterranean and Californian agriculture. A. kamali and A. ananatis are used for control. A. vladimiri has been studied for its association with a symbiotic virus (Anagyrus vladimiri ) that enhances success. Mass rearing techniques have been developed for several species to support programs.

Similar Taxa

LeptomastixAlso encyrtid of mealybugs, but distinguished by different antennal structure and wing venation patterns
CoccidoxenoidesEncyrtid mealybug with different body proportions and antennal club structure
PseudaphycusRelated encyrtid parasitizing mealybugs, distinguished by details of mesoscutal and ovipositor structure
ApoanagyrusSometimes treated as a separate but closely related to Anagyrus, with overlapping ranges and morphological similarity

More Details

Subgenus Nesoanagyrus

Beardsley (1969) established the subgenus Nesoanagyrus within Anagyrus, primarily for with modified antennal structures and specific wing characteristics found in the Pacific region.

Symbiotic Virus Association

Research on A. vladimiri has revealed a novel double-stranded virus (Anagyrus vladimiri , AnvRV) that is vertically transmitted and enhances hatching success by suppressing mealybug immune responses. This represents one of the first documented cases of a beneficial viral in an encyrtid .

Taxonomic Complexity

The A. pseudococci has been resolved using molecular data, revealing cryptic previously misidentified. Similar complexes likely exist within other widespread Anagyrus species, necessitating integrated morphological and molecular approaches for accurate identification.

Mass Production Economics

Studies on A. lopezi mass rearing demonstrate that production depends on plant cutting , with optimal yields at intermediate densities (9 cassava cuttings per 75×50×50 cm cage) due to density-dependent competition effects. Production costs have been estimated at approximately IDR 65 per mummy in Indonesian facilities.