. A text-book of agricultural zoology. Zoology, Economic. PLAHT-LICE. 241 the bottom of the cracks they have produced, more or less protected by their wool from the cold. It is stated, on the authority of Saimders in America, that this species also attacks the roots of the apple-tree. AH such cases sent me in Britain, and repeated investigations and inquiries, show that the lice taken on apple-foots, some forming large galled patches, belong to two other species^—S. fodiens and PempTiigvs lactuarms. Still, from American reports it seems that there is a ground form of S. lanigera, like the grou
. A text-book of agricultural zoology. Zoology, Economic. PLAHT-LICE. 241 the bottom of the cracks they have produced, more or less protected by their wool from the cold. It is stated, on the authority of Saimders in America, that this species also attacks the roots of the apple-tree. AH such cases sent me in Britain, and repeated investigations and inquiries, show that the lice taken on apple-foots, some forming large galled patches, belong to two other species^—S. fodiens and PempTiigvs lactuarms. Still, from American reports it seems that there is a ground form of S. lanigera, like the ground form of the vine phyl- loxera. Since the above was written I have received a valu- able Eeport from the Agricultural College attached to Missouri State University (), by Mr Stedman, in which he clearly shows that a ground form of S. lanigera exists Prevention and Remedies.—We notice this disease chiefly rampant in neglected orchards, where the trees are cramped. Fio. 122.—Pldm Aphis (jlplig prwrei). 1, Viviparous female; 2, ovigerons female. (Whitehead.) together, and the trunks and boughs covered with moss and lichens. Keeping the trees properly thinned, with plenty of. 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
