, and the maggot, do not seriously interfere with the crop
where good cultivation prevails, but the Celery fly appears to be
indifferent to good cultivation, and therefore must be dealt with
directly. Dusting the leaves occasionally with soot has been found to
operate beneficially. It should be done during the month of June on the
mornings of days that promise to be sunny. If the soot is put on
carelessly it will do more harm than good; a very fine dusting will
suffice to render the plant distasteful to the fly. Syringing the leaves
with water impregnated with tar has also saved plants from attack. Where
the eggs are lodged the leaves will soon appear blistered, and the
maggot within must be crushed by pinching the blister between the thumb
and finger. Leaves that are much blistered should be removed and burned,
but to rob the plants of many leaves will seriously reduce the vigour of
growth.

==Celeriac==, or ==Turnip-rooted Celery==, is much prized on the Continent
as a cooked vegetable, and as a salad. In ordinary Celery the stem forms
a mere basis to the leaves, but in Celeriac it is developed into a knob
weighing from one to five pounds, and the root is more easily preserved
than Celery. When cooked in the same manner as Sea Kale, Celery is well
known as a delicacy at English tables, and the cooked Celeriac ranks in
importance with it, though it affords quite a different dish. The stem
or axis of the plant is used, and not the stalks. To grow fine Celeriac
a long season is requisite; and therefore it is advisable to sow the
seed in a gentle heat early in March, and afterwards prick out and treat
as Celery; but after the first stage the treatment is altogether
different. For the plantation a light and rich soil is required, and
where the staple is heavy, a small bed can easily be prepared by
spreading six inches depth of any sandy soil over the surface. The
plants must be put out on the level a foot and a half apart each way,
and be planted as shallow as possible. Before planting, trim carefully
to remove lateral shoots that might divide the stems, and after planting
water freely. The cultivation will consist in keeping the crop clean,
and frequently drawing the soil away from the plants, for the more they
stand out of the ground the better, provided they are not distressed.
They must never stand still for want of water, or the roots will not
attain to a proper size. The lateral shoots and fibres must be removed
to k