Anaphothrips obscurus

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Anaphothrips obscurus females, micropterous (left) and macropterous (right) forms (click on image to enlarge it)
Author(s): Laurence Mound, ANIC, CSIRO
Source: PaDIL

Anaphothrips obscurus (Müller 1776) - (American grass thrips)

This thrips is widely distributed in temperate and subtropical regions. The adults and larvae live within the leaf sheaths of grasses and cereals and can cause significant damage. For example, young maize plants may be attacked and more than 10% seed yield reduction has been reported for bentgrass (Agrostis stolonifera). The feeding damage results in yellow streaks when the leaves mature.

The adults are around 1½ mm long and yellowish brown. They may have short wings (brachypters) or long wings (macropters). Intermediates between both forms also exist.

Vernacular names
• English: American grass thrips
eastern grass thrips
• Français: thrips des prés

Thrips obscurus