. The book of the garden. Gardening. ACETAEIACEOUS PLANTS.—CELEKY. 149 grubs are the larvse of Tephritis onopordinis. The grubs may be foimd in the leaves of the Fig. 53. the substance of the stem ; so that we have no doubt portions of the stalks, although contaiu- Fig. CELERY-FLY, GUUB, &C. celery in June, July, Augu3t,September, October, and November, for there are two or more broods of them in the course of the year. The grubs, although less frequently, are found doing similar damage to the leaves of Alexanders and parsnips. When full grown, the grubs descend into the earth, and re
. The book of the garden. Gardening. ACETAEIACEOUS PLANTS.—CELEKY. 149 grubs are the larvse of Tephritis onopordinis. The grubs may be foimd in the leaves of the Fig. 53. the substance of the stem ; so that we have no doubt portions of the stalks, although contaiu- Fig. CELERY-FLY, GUUB, &C. celery in June, July, Augu3t,September, October, and November, for there are two or more broods of them in the course of the year. The grubs, although less frequently, are found doing similar damage to the leaves of Alexanders and parsnips. When full grown, the grubs descend into the earth, and remain in the chrysalis state till the spring following, when they give birth to the fly. Then the celery-fly may usually be found upon the leaves of the laurel, hovering over flowers, and resting upon palings in the sun- shine, from the middle of May to the end of ; MrWestwoodthus describes it: "The general colour of the body, which is five-jointed, varies from rusty brown to shining black; head buff, with black hairs; legs yellow; thorax (throat) sprinkled with long black hairs; wings black, with various pale spots; eyes green. The whole length of the insect is not more than one- sixth of an inch, and its wings, when outspread, barely half an inch ; Mr Westwood sug- gests that a string smeared with bird-hme, and stretched over the celery plants, might catch many of the parents. This is a good idea, and, if carried out, would no doubt entrap many moths and butterflies also, which would be a wholesale mode of lessening the numbers of grubs afterwards. Piophila apii (the celery stem-fly), fig. 54.— The discovery of this hitherto undescribed in- sect is due to the author of the article " Ento- mology," in the " Gardeners' Chronicle," 1848, p. 332, who thus describes it, and its mode of operation: " The larva burrows into the solid stem and fleshy stalks, working its way up the latter, its tract, as well as itself, being at fir
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
