Gnorimoschema grindeliae

Family: Gelechiidae | Genus: Gnorimoschema
Detachable: integral
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Location: stem
Form: abrupt swelling
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Gnorimoschemine Moths of Coastal Dune and Scrub Habitats in California (Lepidoptera: Gelechiidae)

Larvae cause the growth of soft, variably shaped galls in newly developing stems [, compressing] the stem nodes ... [C]lump[ed] foliage just above [may] includ[e] leaves that form a sheath around the gall. Later the stem extends beyond this rosette ... By mid- to late March many galls have reached full size (12-20mm long x 10-l2mm diameter) [and] are whitish or pale green with fleshy walls 2-5mm thick ... [L]arvae reach maturity in April, when each cuts a hole in the gall and drops to the ground ... By ... early to rnid-April, [the galls] are white tinged with purplish brown exteriorly. Later, the remaining gall tissue deteriorates [leaving a] clustering of nodes and twigs ...

[for monochrome photo of gall, see pg. 45]

- Powell, Jerry A. and Povolný, Dalibor.: (2001) Gnorimoschemine Moths of Coastal Dune and Scrub Habitats in California (Lepidoptera: Gelechiidae)©


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