. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. THE GOAT-MOTH 65 this or any other insect-pest, if there are no other breeding- grounds close at hand. It is possible to find and destroy the pupae, which lie up on palings, walls, and similar objects. A quick eye is needed to distinguish them, and unless their places of shelter are scrupulously searched at frequent intervals they become safe retreats instead of traps, and should be abolished as far as possible. No means of extermination that man can devise is nearly
. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. THE GOAT-MOTH 65 this or any other insect-pest, if there are no other breeding- grounds close at hand. It is possible to find and destroy the pupae, which lie up on palings, walls, and similar objects. A quick eye is needed to distinguish them, and unless their places of shelter are scrupulously searched at frequent intervals they become safe retreats instead of traps, and should be abolished as far as possible. No means of extermination that man can devise is nearly so effectual as the ichneumons, an account of which is given in Lesson 22. In certain years so large a proportion of the larvse are ichneumoned that for some years afterwards the cabbage whites are com- paratively few. In this, as in other cases of insect attacks, liberal feeding may help the crop over the time when it is most liable to serious injury. 16. THE GOAT-MOTH (Cossus ligaiperda) The caterpillars of the goat-moth are very destructive to standing timber, devouring the wood of healthy trees of. Fig. 48.—Goat-moth (female). After Roesel von Rosenhof. many sorts. They are most commonly met with on the willow and poplar, but the damage which they do to oaks causes the most serious loss. The female is a large, thick-bodied moth of brown and grey colours, from 70 to 90 mm. across the expanded wings; the male is decidedly smaller. The fore wings are long, and marbled or mottled with black and white; the hmd wings are short, rounded, and nearly uniform in colour. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Miall, Louis Compton, 1842-. London, G. Bell & sons
Size: 2341px × 1068px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1902
