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Chrysolina americana Linnaeus, 1758

Chrysolina americana-Clabecq.JPG <b><i>Pterophorus pentadactyla</b></i> Linnaeus, 1758||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/15/20160615214931-fd83bed6-th.jpg>Thumbnails<b><i>Cantharis flavilabris</b></i> Fallen, 1807||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/14/20160614210040-e9c4f93c-th.jpg><b><i>Pterophorus pentadactyla</b></i> Linnaeus, 1758||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/15/20160615214931-fd83bed6-th.jpg>Thumbnails<b><i>Cantharis flavilabris</b></i> Fallen, 1807||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/14/20160614210040-e9c4f93c-th.jpg><b><i>Pterophorus pentadactyla</b></i> Linnaeus, 1758||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/15/20160615214931-fd83bed6-th.jpg>Thumbnails<b><i>Cantharis flavilabris</b></i> Fallen, 1807||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/14/20160614210040-e9c4f93c-th.jpg><b><i>Pterophorus pentadactyla</b></i> Linnaeus, 1758||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/15/20160615214931-fd83bed6-th.jpg>Thumbnails<b><i>Cantharis flavilabris</b></i> Fallen, 1807||<img src=./_datas/t/6/y/t6ynvw9sux/i/uploads/t/6/y/t6ynvw9sux//2016/06/14/20160614210040-e9c4f93c-th.jpg>

Chrysolina americana Linnaeus, 1758
Common names: Rosemary Beetle [En], Chrysomèle du romarin, Chrysomèle américaine [Fr], Rozemarijngoudhaantje [Nl]

Tubize, BRABANT ● Belgium

Description: 8mm long, metallic green beetle with purple stripes. The larvae are grey with darker stripes and up to 8mm in length. Can be found feeding on the leaves of rosemary, lavender and related plants. The soft-bodied grubs are greyish white with five dark longitudinal lines; fully grown larvae are 5-8mm long. Sausage-shaped eggs, 2mm long, may be found on the underside of the leaves from early autumn to spring.

Biology: Its host plants are rosemary (Rosmarinus officinalis) and lavender (Lavandula species). However, the beetle is able to breed on thyme (Thymus species), sage (Salvia species), Russian sage (Perovskia atriplicifolia), and it is possible that some other plants in the Lamiaceae family may also act as hosts. Rosemary beetle adults remain relatively inactive on their host plants during July and August. In late August and September the beetles resume feeding, mate and lay eggs, which they continue to do on warm winter days until spring. The eggs hatch within two weeks and the larvae feed for as little as three weeks before entering the soil to pupate. The pupal stage lasts for a further two to three weeks before adults emerge.

Distribution: Native to Southern Europe, despite the species name americana. Introduced to the United Kingdom (discovered in 1994) and in Northern Europe where it became invasive.

References:
Wikipedia, Chrysolina americana
>Royal Horticultural Society




Created on
Tuesday 31 May 2016
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