Amitus

Haldeman, 1850

Amitus is a of in the , containing at least 16 described . Species in this genus are primarily known as agents of (), with several species internationally for pest management. Notable species include A. hesperidum, an effective parasitoid of introduced to multiple countries; A. fuscipennis, used against ; and A. bennetti, a parasitoid of .

Amitus by (c) Hawk T., some rights reserved (CC BY), uploaded by Hawk T.. Used under a CC-BY license.

Pronunciation

How to pronounce Amitus: /ˈæmɪtəs/

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Habitat

Associated with agricultural and horticultural systems where occur, including citrus groves, tea gardens, greenhouses, and bean fields. Specific preferences vary by and host association.

Distribution

occur across multiple continents including Asia ( locality of A. hesperidum in Hong Kong and Singapore), the Americas (Mexico, Texas, Florida, South America), and have been to regions outside ranges for purposes.

Host Associations

Life Cycle

Development is temperaturedependent. For A. fuscipennis, development ranges from 61 days at 15°C to 22 days at 30°C. For A. bennetti, development time decreases from 72 days at 15°C to 28 days at 25°C, requiring approximately 400 with a development threshold of 10°C. are pro-ovigenic, emerging with lifetime load ready to oviposit.

Behavior

Females are attracted to induced volatiles; A. hesperidum is specifically attracted to the tea plant (E,E)-α-farnesene. Searching involves (comprising 61% of time budget), host drumming and probing, and area-restricted searching after . typically targets first . A. fuscipennis disperses up to 12 meters with wind-assisted , showing preference for downwind movement.

Ecological Role

agent of pests in agricultural systems. have been to new regions (Mexico, Texas, Florida, Dominica) for of whiteflies. Can significantly reduce pest , with field studies showing rates 2.25 times higher in treated versus control areas.

Human Relevance

Important agents used in programs. A. hesperidum successfully established in multiple countries for control. A. fuscipennis evaluated for management. A. bennetti assessed for control in cotton and bean . based developed to enhance efficacy in tea production systems.

Similar Taxa

  • EncarsiaBoth are of used in ; Encarsia is in rather than and exhibits compared to proovigenic Amitus
  • EretmocerusAnother used in ; differs in () and specific range

More Details

Notable species

A. hesperidum: described by Silvestri in 1927, from India to Mexico, Texas, and Florida for control. A. fuscipennis: described by MacGown & Nebeker in 1978, studied extensively for in Colombia. A. bennetti: described by Viggiani & Evans, of with extended development time compared to other parasitoids.

Reproductive biology

Proovigenic strategy with high ; A. fuscipennis produces 338-430 per female at optimal temperatures (15-25°C), with maximum on first day after . longevity reduced when present (5-8 days) versus without hosts (19-29 days).

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Sources and further reading