. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. HEMIPTERA: THE TRUE BUGS 93 numbers of the plant lice increase, the ants extend the burrows to provide for them. The ants continue thus to look after the needs of the aphides throughout the summer months. In autumn, however, a still more interesting thing takes place, for at this time an egg-laying brood of aphides is developed and the small blackish eggs are taken by the ants far down in their underground nests, where the eggs are cared for throughout the winter. When the
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. HEMIPTERA: THE TRUE BUGS 93 numbers of the plant lice increase, the ants extend the burrows to provide for them. The ants continue thus to look after the needs of the aphides throughout the summer months. In autumn, however, a still more interesting thing takes place, for at this time an egg-laying brood of aphides is developed and the small blackish eggs are taken by the ants far down in their underground nests, where the eggs are cared for throughout the winter. When the eggs hatch early the following spring, the young plant lice are carried by the ants, generally to the roots of some grass-like weed, there to start the new season's brood, which will be trans- ferred later to the roots of the young corn plants. In a case Uke that of the Comroot Aphis, where the eggs of the insect pass the winter in the cornfield, rotation of crops is the best means of reducing injury by the pest. It is fortunate that there are great numbers of enemies of aphides in general, for otherwise it would probably be im- possible to grow many crops now produced. Many birds feed freely upon the eggs and later stages of aphides, while vast numbers of predaceous and parasitic insects develop at their expense. The insecticides that are most effective in destroying plant lice are kerosene emulsion, whale-oil soap, and various decoctions and extracts from tobacco Elm Leaf affected by Aphides. 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 Weed, Clarence Moores, 1864-1947. Boston ; New York : D. C. Heath & Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
