Parsnips
It generally lives in the umbels, drawing them together by a web. In this it lies protected, but emerges and drops as soon as the plant is shaken. The larvae may become hurtful by feeding on the seeds. If necessary, they may be diminished by shaking over anything from which they can be swept up and destroyed; or they may be shaken on to the soil, where they can be trodden on and crushed. The pupae may be found, occasionally in numbers, in the interior of the Parsnip stems; and they may be collected and destroyed, with the latter, without difficulty. It would be well to clear away all umbelliferous weeds, on which these insects feed.