Io82 THE BOOK OF GARDENING. 



flowers, nor fruits being aftected. Aphides readily succumb to it, 

 as will those other pests of the greenhouse and outdoor garden, 

 Thrips. In the case of Cactuses suffering from insect pests — 

 Mealy-bug, Szc. — the hot-water treatment 

 may be very successfully employed, first 

 turning the plants on their sides. 



For the larger borers, like Goat ]\Ioth 

 and AVood Leopard Caterpillars, a piece of 

 copper wire may be thrust up the holes Fig. 691. — Ladybird 

 made by the insects. Where, however, old Larva. 

 trees are badly attacked by the first-named 



pests the galleries are so numerous, and have so many ramifi- 

 cations, that it is hopeless to attempt to kill the insects by 

 such means, or even by injecting a powerful insecticide into 

 their haunts. 



Hard-bodied insects, like many of the Beetles, are difficult to 

 cope with where they do not actually feed upon the green 

 portions of the trees or plants, their horny wing-cases protecting 



them against 

 the insecticides 

 which kill by 

 contact and 

 that may be 

 safely em- 

 ployed. Many 

 of the most 

 t r oublesome 

 Weevils, all of 

 which are night 

 feeders, arebest 

 shaken on to a 

 board thickly 

 smeared with 

 tar, and after- 

 wards collected 

 and destroyed. 



Earwigs, 

 Cockroaches, 

 Ants, Wasps, 

 and Woodlice 

 are all most 

 effectually dealt 

 with by traps 

 or poisoned 

 food. Red 



Spider (including the Bryobias) should be treated to an insecticide 

 which kills by contact when on outdoor trees ; while indoors they 

 should be treated to XL All Insecticide. 



Fig. 692. — Ground Beetle (Carabus nemoralis). 



(twice natural size.) 



