|Large Rose Sawfly Arge pagana
|Monks Eleigh Garden, Suffolk,
The Large Rose Sawfly is normally seen between
March and June as it flies rather awkwardly in search of rose
stems on which to lay its eggs. The female has a saw-like
appendage with which it cuts a hole in the stem into which it
lays its eggs.
The larvae hatch quickly and begin to devour the leaves on rose bushes. Initially they bunch together as in photo 4 but, as they grow bigger, they begin to lead a more solitary existence.
The pupae overwinter within a cocoon near or in the soil before emerging the next spring as this distinctive black insect with a bright yellow abdomen.
There is more information on The Garden Safari.
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