Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . Fig. S3. Eose Leaf-hopper: a, adult;b, pupa. INSECTS AFFECTING FLOWERS IN THE WIN-DOW-GARDEN AND GREEN-HOUSE. INJURING THE LEAVES. Plant-lice or Aphides. There are many different species of aphides, plant-lice, or green flies, affecting the various floweringplants. But all are quite similar in life-history andhabits, and the same remedies apply to each. Theyall multiply with marvellous rapidity on account of their habit of giv-ing birth to livingyoung without thepres
Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . Fig. S3. Eose Leaf-hopper: a, adult;b, pupa. INSECTS AFFECTING FLOWERS IN THE WIN-DOW-GARDEN AND GREEN-HOUSE. INJURING THE LEAVES. Plant-lice or Aphides. There are many different species of aphides, plant-lice, or green flies, affecting the various floweringplants. But all are quite similar in life-history andhabits, and the same remedies apply to each. Theyall multiply with marvellous rapidity on account of their habit of giv-ing birth to livingyoung without thepresence of maleaphides. Theymature rapidly,-and obtain foodby inserting theirpointed beaks into^the stem or leaf,,and sucking out the sap. There are generally twoforms of them, one being winged (Fig. 83, b, c) andthe other wingless (a). ? These insects are the com-monest pests of flowering plants. Remedies.—Tobacco is the great specific for these-insects. It may be used in various forms, but gener-ally the most satisfactory form is that of the refuse-
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Keywords: ., bookcentury1800, bookdecade1890, bookidi, booksubjectinsecticides
