. Annual report of the Regents. New York State Museum; Science. 22 NEW YORK STATE MUSEUM. Fig. 31 Elm bark iice on twig, full grown females (original) Other parts of the state. The draft on a badly infested tree in June is very great; the excretions of the bark lice falling in fine showers keep stones beneath wet even on good drying days. The leaves of infested trees are frequently covered with a black- ening fungus, which grows in this secre- tion. Treatment: spray the young with kero- sene emulsion or whale oil soap solution. 39 Elm borer (Saperda triden- t a t a). Diseased or dead bark is u
. Annual report of the Regents. New York State Museum; Science. 22 NEW YORK STATE MUSEUM. Fig. 31 Elm bark iice on twig, full grown females (original) Other parts of the state. The draft on a badly infested tree in June is very great; the excretions of the bark lice falling in fine showers keep stones beneath wet even on good drying days. The leaves of infested trees are frequently covered with a black- ening fungus, which grows in this secre- tion. Treatment: spray the young with kero- sene emulsion or whale oil soap solution. 39 Elm borer (Saperda triden- t a t a). Diseased or dead bark is usually the first indication of injury by this in- sect. The tree soon becomes unthrifty and examination of the bark may show in its inner portions white, flattened, legless grubs, which fre- quently cause consider- able injury. The beetles appear from early May till latter part of June. Treatment: cut and burn badly infested trees. Protect valuable trees with carbolic soap wash , Fig. 32 Elm borer: a adult; h half grown larva—hair durinff MaV and June. llne represents natural size of latter (original) 40 Elm snout beetle (Magdalis barbita). Thick, fleshy, legless grubs working in inner bark of elm. Follows attack by the elm-borer and occa- sionally is very abundant. The parent insect is a black snout beetle about J inch long. It sometimes occurs in large num- bers and may have associated with it the reddish, closely allied Magdalis armi- c o 11 i s. Treatment: burn badly infested trees and keep others 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 New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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