. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. SPRtCfi FIH4âSPRUCE-GALL APHIS. 267 their!*?-;.! ^^:' ^?Z ^' "^^^^ ^^*^^r ^» ^ hole gnawed in the bark a little above the root of their food-f -ee with wnoi dust and chips or, if nothing else occurs, Sey whrl^^^^^^ thing accessible together; in captivity I
![. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. SPRtCfi FIH4âSPRUCE-GALL APHIS. 267 their!*?-;.! ^^:' ^?Z ^' "^^^^ ^^*^^r ^» ^ hole gnawed in the bark a little above the root of their food-f -ee with wnoi dust and chips or, if nothing else occurs, Sey whrl^^^^^^ thing accessible together; in captivity I Stock Photo](https://c8.alamy.com/comp/REMBGF/a-manual-of-injurious-insects-microform-with-methods-of-prevention-and-remedy-for-their-attacks-to-food-crops-forest-trees-and-fruit-to-which-is-appended-a-short-introduction-to-entomology-insect-pests-agricultural-pests-entomology-insectes-nuisibles-lutte-contre-les-ennemis-des-cultures-lutte-contre-les-entomologie-sprtcfi-fih4spruce-gall-aphis-267-their!-!-z-quot-r-hole-gnawed-in-the-bark-a-little-above-the-root-of-their-food-f-ee-with-wnoi-dust-and-chips-or-if-nothing-else-occurs-sey-whrl-thing-accessible-together-in-captivity-i-REMBGF.jpg)
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. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. SPRtCfi FIH4âSPRUCE-GALL APHIS. 267 their!*?-;.! ^^:' ^?Z ^' "^^^^ ^^*^^r ^» ^ hole gnawed in the bark a little above the root of their food-f -ee with wnoi dust and chips or, if nothing else occurs, Sey whrl^^^^^^ thing accessible together; in captivity I have found a bftnf thif * ''' *^l''''''' '^ ^ ^^^1-bo- «"^tB them per?ec«y In this cocoon the caterpillar changes to chrysalis, from which fZ'.''"'' '?* ''' ^"^ «^ J"°« «^ the folloLg Lr readXaot '-fnfi T "/ ^^.'?' caterpillars they Tay be readily got rid of by hand-picking on low trees in nurseries appearance '''' '^ ' ^''^'' ^^« 8°* used ?o thef^ appearance. They are not easy to detect at first from the form and colour of the markings much resembling tS st«lT'^''^^'^^?uâ¢â ^^'^^" first hatched the catZX are ba k ' Wh?* n?f*'"'r^ ^P^^^^l ^^"^«««' toCalmos? hi mo^n ⢠^^**^'^ ^""^ heen prevalent, examination should on Tfn theTarTn'f ?b *' f f 5? ^°^°°^« ^''^^^ ^een formed shVuM be destroyed. '"'''*'^ *''"'' '"^' ^' ^°' *^^ ^°^°°^« SPEUCE FIR. Spruce-gall Aphis. Chermes abietis, Linn.. Winged female, pupa, eggs, and horn, all magnified. Section of r;, ., ⢠gall in dried state after departure ol Chermes '""* The Spruce-gall Aphis, known aleo as the Spruce Adelae, or Spruce Chermes, causes the .mall bright g?een! ortS and rosy, galls, shaped like miniature Pine Apples (or soC?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of th