. Economic entomology . Phytoptus pyii. (Typhlodroiuus pyri of Scheuten.) Copied from his figure. Gamasus sp. Copied from Sch<'Uten, who supposed it to be the perlect insect oi I' pyii. Wiegman's "Archiv" for 1857, and translated into our own Annals and Magazine of Natural History in the same year. The leaves of the pear trees in his garden were attacked by black pustular inflated spots, under the epidermis of which he found the species of Phytoptus, which he named Typhlodromus pyri. On examining a large number of spotted leaves in his garden, in which all the pear tr
. Economic entomology . Phytoptus pyii. (Typhlodroiuus pyri of Scheuten.) Copied from his figure. Gamasus sp. Copied from Sch<'Uten, who supposed it to be the perlect insect oi I' pyii. Wiegman's "Archiv" for 1857, and translated into our own Annals and Magazine of Natural History in the same year. The leaves of the pear trees in his garden were attacked by black pustular inflated spots, under the epidermis of which he found the species of Phytoptus, which he named Typhlodromus pyri. On examining a large number of spotted leaves in his garden, in which all the pear trees were similarly attacked (one tree having a third of its leaves affected), he always found the same four-footed larvse in the interior of the leaves, and, in most cases, on the exterior a species of eight-legged mite, which he took to be the perfect form of the Phytoptus. He gives figures of these, and from them it is plain that the so-called larva is a Phytoptus,
Size: 1886px × 2651px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondonchapmanandha
