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 ON' 
 
 BAI 
 
ONTARIO AGRICULTURAL COLLEGE 
 
 EXPERIMENT STATION 
 
 Bulletin lxii 
 
 BARK-LOUSE AND PEAR-TRBE SLUG 
 
 BV J HOYKS PANTON PHOKB880K OF NATURAL HJHI'OKY AND OKDLOHY 
 
 fVltLlHUBD BV THE DEPARTMENT OF AGKICVLTVRE 
 
 Aortl iiti tSOl 
 
 TORONTO 
 
 PRINTED BY WARWICK & SONS 
 
Ontario A. 
 
 J\MKS MlLU 
 
 Thomas Sha 
 C. 0. Jamba, 
 
 I. HOTKS Pi 
 
 P. 0. Grknj 
 H. H. Dkai 
 E. Lawrbno 
 Captain Wy 
 0. A. Zavit 
 OBOBas Hai 
 A. MoOalu 
 
 A. Blub.. 
 John I. Hoi 
 John MoMi 
 Edward Jb: 
 J. 8. huiTH 
 G. B. BoYci 
 D. A. Dowi 
 V/m, I)onal 
 
MINISTER OF AORIODLTURB 
 
 Hon. John Dryden, Toronto. 
 
 I] 
 m 
 
 Ontario Agricultural College and Experimental Farm, Guelph, 
 under control of the Minister of Agriculture. 
 
 J\Hsa Mills, M.A. 
 
 Thomas Shaw 
 
 0. O. Jambs, M. A. 
 T. HoTKs Panton, M.A., P, 
 F. 0. GRBNaiDE, V.8.. 
 H. H. Dkan, B.S.A. 
 E. Lawhjjnoe Hunt, B.A. 
 Oaptain Waltbb Clarke . 
 0. A. Zavitz, B.S.A . 
 Oboboe Harooubt, B.S.A. 
 A. MoOallum, . , 
 
 OFFICERS. 
 
 President. 
 
 Professor of Agriculture and Farm Superintendent. 
 
 ProfesAor of Ghemiatry. 
 
 G.S. Professor of Natural History and Geology. 
 
 Professor of Veterinary Ssience. 
 
 Professor of Dairy Husbandry. 
 
 Assistant Resident and Mathematical Master. 
 
 Instructor in Drill and Gymnastics. 
 
 Assistant Superintendent of Experiments. 
 
 Assistant Chemist. 
 
 • I • . • 1 • • • . . , • . Bursar. 
 
 ADVISORY BOARD. 
 
 A. Blue Deputy Minister of Agriculture, Toronto. 
 
 JoKN I. HoBSON . . . . . . . . Mosborough, County of Wellington, 
 
 JoH.N McMillan, M.P ConsUnce, County of Huron. 
 
 Edward J eitfs Bond Head, County of Simcoe. 
 
 J. S. tJMiTn Ailsa Craig, County of Middlesex. 
 
 G. B. BovcR Norhain, County of Northumberland. 
 
 D. A. DowLiNO.. Appleton. County of Carleton. 
 
 V/M. Donaloson Woodstock, County of Q^fotd. 
 
 Chaiiinan of Board- .... JoHN 1. HoBSON. 
 Seeretary of Board - • ■ . • A. BLUE. 
 
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 OYSTER 
 
 Several i 
 nature of I 
 rid ot th?n 
 
 This bul 
 of practica 
 tion upon 
 otchards a 
 
 Y 8 T K 
 
 minute ins 
 tree, is ref 
 sixtb of at 
 disguised 
 
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 Oy 
 
 If nri'l 
 right 
 
 Usually i 
 tuarked t 
 the twigs 
 able size, 
 time in t 
 bii obacr^ 
 beneath 
 jEpirlv in 
 
BtlT-IvBTIN I.XII. 
 
 OYSTER-SHELL BARK-LOUSE AND THE PEAR-TREE SLUG. 
 
 Several inquiries have como to tho College in reference to the 
 nature of the aV.ove insects and tlio bei^t means to ubo in order to get 
 
 rid ot th°ir. 
 
 This bulletin has been prepared with the object that it may prove 
 of practical i...portance not only to those who have asked informa- 
 tion upon thf Hubject, but also to many others in the province whose 
 orchards are infosted by these pests. 
 
 Y 8 T K R-8 n R L L B A R K-L o u s K {Af;/fila»fm pomorum). This 
 minute inaoct. found upon the bark of the small twi«s of the apple 
 tree, is lefxdiiy identified by its o.^ster-shoU shaped scile, about one- 
 sixth of an inch in length. This scale is of a brown color, and thus 
 disguised by the bark is not seen unless by close observation. 
 
 1 
 
 1^1 
 
 /^ i. i,„ii Warlr loiiKP / Tnscet 2. Eop. ■'• Forming scale. 
 4«SnSr?A?wrcn. LscWc.. r.Scai^.onLnr,oft.i,. !l on 
 right of first six cutH denotes natural 'ize. 
 
 Usually a good many are clustered together, and their shape is so 
 marked that we soon recognise them. Though largely found upon 
 The twigs, they are also found upon branches and limbs ot consider- 
 able size IE the scales be raised up and examined beneath, any 
 Time in the fall or winter, numbers of very small white particles will 
 b. observed, which on close examination will prove to be eggs. Here 
 
 "^ """' * ' ,. , . 1-11 _l,__«J "f^alp" ♦how rpmn'" Until 
 
 beneath the peculiarly oyster Hht 11 oftapra ncasc, .» ,. r.u. 
 
 f^rlyin tjie summer. As soon fvs the >ve^th.r « fa orable, especi. 
 
 ll 
 
I "^' KID ft flt]j 
 
 an ounce tc 
 
of soft Hoap, or ono-quarter pound hani Hoap, in two (|UHrta of Itniling 
 water. To seven parts of tluH n<h\ on" part of crudn oarholit' aoul. 
 Ig|l3. Soft soap made atioitt ax thick as paint liy adding a strong 
 solution of waHhin^' soda in water. This applied to tiii< trunk and 
 limbs improves the vigor of the tree as well as ;,'0tH rid of the hark 
 lice. 
 
 HP B A R -T R K K S MM} (Selnndrif crriml). The ev'S^ "f tlii» insect 
 are usually dopohited early in June in llie Iraf, which appijars marked 
 with semicircular incisions. TUeHt; have been nuide by a peculiar 
 struutun^ which the female has for th(i purpose. Tiie eggs woon hutch 
 
 Pear-tree slug. 1. Intect. S. Slinjs/i'cilinijonlaif. S, Sluy, enlarged tUt, 
 
 and the young slug develops until it reaches about one-half an inch 
 in length. It presents an unattractive appearance, being somewha*; 
 blackish or bottle green in color, covered v. ith en olive-colored slime. 
 The front part of the body is swollen, and the slug resembles a tad- 
 pole in appearance. It has a disagreeable odor. During the slug 
 period of its existence it feeds upon the foliage of the pear, cherry 
 and plum, and in some places becomes p. serious trouble. The larval 
 condition being completed, it leaves th' . -ee and spends a portion of 
 its existence in the ground, from whicu in duo time it emerges the 
 perfect insect— a fly of a glossy black color with four transparent 
 wings and dull yellow logs. The female is about one-fourth of an 
 inch long and the male somewhat smaller. The first appearance of 
 the slug if near the end of May until the middle of June, but unother 
 brood m'*y appear near the end of July or August. The cherry and 
 pear trees should bo examined for these troublesome insects aliout the 
 middle of June, and again early in August, They are very voracious, 
 and can soon destroy the foliage of a tree. When attacked, the 
 leaves wither and look as if scorched by Are. 
 
 Remediea. The following remedies are "suggested : 
 
 1. Syringe with hellebore mixed with water in the proportion of 
 an ounce to two gallons. 
 
 2. Syringe with Paris green, one teasp-CHonful to two gallons water. 
 
 3. Dust upon the foliage fresh air-slaked lime. 
 
 ' 41 
 
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