166 FLOWERS OF GARDEN AND GREENHOUSE 
that when the succulent growing tips of the branches have been much 
attacked by these pests, they do not develop into healthy wood, and 
that the heroic remedy is the best—that is, to cut off the infested shoots 
and put them on the fire at once. That is a certain end to the insects, 
whereas many of the washes merely stupefy for the time, and the 
Greenfly revive to found new colonies, But not only does the Aphis injure 
Roses by its direct attacks, its sticky secretions provide a suitable 
material in which the low fungus Capnodiwm may flourish. Although 
this does not appear to attack the tissues of the Rose, its growth is 
unsightly, and clogs the breathing pores of the plant. The Lace-wing 
fly (Hemerobius) and the Lady-bird (Coccinella) should be encouraged, 
for their larve live entirely by sucking Greenfly dry. The larve of 
various species of Saw-fly (Lenthredo) and of moths innumerable feed 
upon the leaves, and these must be got rid of by hand-picking, which is 
at once more efficacious and more economical than the application of 
sticky messes to the stems. Several species 
clock (P, hyllopertha), feed upon the pollen and stamens of the flower, 
but beyond picking them off when seen, little can be done with these 
lcroscopical examination, In this way he will have 
Spreading, but at the same time 
oil, ete. Powdered sulphur and 
palliatives, € are recommended as cures Or 
in fungus 
treatment 
of the organism as a whole. part and try to improve the health 
oma . . ee 79 Tepresents the extremity of a flowering 
Neen sh a of Rosa multiflora, the appropriately named Many- 
»teduced by about one-fourth from the natural dimensions. 
z 
e 
§ 
