Scirtothrips

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Thysanoptera
Family: Thripidae
Subfamily: Thripinae
Genus: Scirtothrips

Pronunciation

How to pronounce Scirtothrips: //skɪrˈtoʊθrɪps//

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

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Summary

Scirtothrips dorsalis, or chilli thrips, is an invasive pest species that poses significant risks to a wide range of agricultural crops through feeding damage and potential disease transmission.

Physical Characteristics

Small size (under a millimeter in length), yellow coloration, dark antennae, and dark striping on the lower abdomen.

Identification Tips

Can be identified by the presence of forked sense cones on antennal segments III and IV, pale antennomeres I-II, dark antennomeres III to IX, three discal setae on lateral margins of abdominal tergites, and three ocellar setae with III between posterior ocelli.

Habitat

Typically found on young plants and new growth, often infesting agricultural crops like pepper, eggplant, mango, and strawberries.

Distribution

Rapidly spreading from Asia to global locations, recently reported in St. Vincent, Florida, Texas, and Puerto Rico.

Diet

Feeds preferentially on new growth of various host plants, including pepper, eggplant, mango, citrus, strawberry, grapes, cotton, tea, peanuts, blueberry, and roses.

Life Cycle

Under optimal conditions, S. dorsalis can develop from egg to adult in slightly less than two weeks.

Reproduction

Females have a pre-oviposition period of one to two days and can lay around forty eggs in their lifetime, primarily inside young leaves and buds.

Ecosystem Role

As a pest, it can impact agricultural productivity through feeding damage and potential disease transmission.

Economic Impact

Feeding damage reduces marketability and can lower farmers' returns due to the destruction of crops.

Evolution

Molecular evidence suggests a biogeographical origin in Southeast Asia or the Indian subcontinent, but the original host remains unknown.

Misconceptions

While implicated in the transmission of three tospoviruses, there is controversy regarding its efficiency as a vector.