. American carnation culture. Carnations. THE GREENFIiY. 95 saults on the citidel of the carnation's life. Professor Theodore Woods, of the United States Agricultural Department says : *'There is not a plant or tree, wild or cultivated, that escapes the ravages of this pest, and of all the beings that rack under the head of injurious insects there is not one capable of causing more distruction than the ; Both the primary and secondary effect of the piercings of an Aphid makes it the carnation's greatest enemy, its powers of mul- tiplication are so enormously rapid, that, abetted
. American carnation culture. Carnations. THE GREENFIiY. 95 saults on the citidel of the carnation's life. Professor Theodore Woods, of the United States Agricultural Department says : *'There is not a plant or tree, wild or cultivated, that escapes the ravages of this pest, and of all the beings that rack under the head of injurious insects there is not one capable of causing more distruction than the ; Both the primary and secondary effect of the piercings of an Aphid makes it the carnation's greatest enemy, its powers of mul- tiplication are so enormously rapid, that, abetted by the I^ocust and San Jose scale, if they were not restrained by destructive enemies of their own, would soon denude the world of vegetation. I^ike the barbarians from the northern hive that overran and destroyed Roman civilization in the fifth century, the Aphides feed upon everything that floats the plasm of vegetable life. Entomologists say its most delectable menu is the rich blood of the Dianthus genus of plants. This insect is too well known to need any description. It multiplies by agamic reproduction. Little cells, or nodes develop on the inner walls of the parent's abdomen, which are rapid- ly detached, and in a few hours are de- livered by its parent as live Aphides. Reraeur estimates that one Aphid may be the progenitor of 6,000,000 lineal descendants in a single season. They breathe through openings in their An Aphid, highly magnified, sides. Some of their offspring have wings so they may more easily scatter their countless numbers. Their mode of continuing their species is an exact duplication of continuing carnations by cuttings. It is recommended to the consideration of advocates of the rurining- out theory. Long years of agamic life has entailed no degeneracy on the Greenfly. It is as virile today as when its first parent thrust its proboscis into the protoplasm of a dianthus leaf. The voracity of the Greenfly is only equaled by its prodigous geometrical powers
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