334 T HE FRUIT-GARDEN. [April. 
Or where wall trees are much infested, first pull off all the curled 
or crumpled leaves; then get some tobacco-dust, or fine snuff, and 
scatter some of it over all the branches, but most on those places 
where the insects are troublesome. This should be strewed over 
the trees in the morning, when the twigs and leaves are wet, and 
let it remain. It will greatly diminish the vermin, and not injure the 
leaves or fruit. 
But fruit trees are also sometimes attacked by insects of the cater- 
pillar tribe, contained numerously in a minute embryo state in small 
webs, deposited on the branches, Sec. animated by the heat of the 
weather, they soon over-run and devour the young leaves, whereby 
neither the trees nor fruit prosper in growth; and which should be 
attended to, especially in young trees, by picking off the webs, &c. 
before the insects animate considerably; and, if accommodated with 
a watering engine, as above suggested, you might play the water 
strongly upon the trees; so as in the whole, to diminish the in- 
crease and spreading depredations of the vermin, as much as pos- 
sible. 
Pruning. 
Pruning of all kinds of fruit-trees, should be finished, in the first 
week of this month, if neglected so long, especially, the forward 
blossoming kinds. See page 214. 
Protecting the blossoms, Sfc. of Wall-Trees from Frost. 
Your early kinds of fruit-trees, particularly those planted against 
walls, may in forward seasons, require protection for their blossoms 
and young setting fruit, from night frosts; the doing of which, will 
be found of importance. For the method, see page 220. 
Where the sheltering of these trees is practised, it should be 
continued occasionally all this month; for although there are ge- 
nerally, some fine warm days and nights, yet the weather is so very 
uncertain at this season, that we often have such severe hard frosts, 
as to prove the destruction of the blossoms and young fruit, on such 
of the above trees, as are very forward and fully exposed. 
They may be protected with mats every cold night, and taken 
down in the morning: if cuttings of evergreens are used, as ad- 
vised last month, let them remain constantly, till the fruit are past 
danger. 
General Spring treatment of Fruit-Trees. 
For the general spring management of Fruit-trees, see the Fruit- 
Garden and Orchard last month. 
Grafting. 
For the various methods of grafting, &c. see the Nursery for last 
month, and also for this. 
