13 



times, trees were banded and the bands inspected several times dmring 

 the larval and pupal periods, the rough bark was scraped off the 

 trees, all infested fruit was destroyed by boiling and the good fruit 

 was carefully inspected before being sold. The results have been 

 encouraging, only 10 per cent, of the larvae recorded in the previous 

 year being found in some localities. The hfe-history of this pest 

 has been studied and much important information obtained. 



The control of the pear thrips [Taeniothrips inconsequens] has been 

 continued on the same lines as in the previous season, with very 

 good results [see this Review, Ser. A, v, p. 70]. During 1917 it was 

 found that this thrips, besides being a pest of deciduous fruit-trees, 

 had become thoroughly estabhshed on many native trees and shrubs 

 on Vancouver Island, including the broad-leaved maple {Acer macro- 

 Ijhyllum), June-berry {Amelanchier floricla), willow {Salix scouleriana), 

 red-flowering currant [Rihes sanguineum), choke cherry (Prunus 

 demissa), and incidentally on ornamental shrubs, on weeds and on 

 Douglas fir {Pseudotsuga taxifolia). Its hfe-history can be completed 

 on the broad-leaved maple and other trees, which it damages in 

 exactly the same way as fruit-trees. Black-currant plantations have 

 been carefully inspected for the bud-mite [£'rioj9%es rihis] and a number 

 of infested bushes have been destroyed. The mite has recently been 

 discovered on the native currant and therefore its eradication is no 

 longer considered possible. The strawberry-root weevil [Otiorrhynchus 

 ovatus] has been troublesome, but growers hope to keep it in check 

 by means of rotation, short-cropping and by delaying the ploughing 

 of the beds until the insects have laid their eggs. The peach twig 

 borer [Anarsia Uneatella] has been increasing and has caused consider- 

 able loss to growers of apricots and peaches. A spray of lime-sulphur 

 (1 : 9) when the buds were swelhng gave good results. Grasshoppers 

 and wireworms did great damage during the year, but were controlled 

 by poison-baits. The woolly aphis [Eriosoma lanigerujn] is increasing 

 in some locahties and requires very thorough measures to keep it in 

 check. 



An account of the quarantine work carried out during the year 

 is given. Stringent measures are being taken to keep the Province 

 free from such pests as Bruchus jyisorum (pea Bruchid) and B. obtectus, 

 Say {fabae, Ril.) (bean Bruchid), all peas and beans being thoroughly 

 inspected before entry and fumigated when necessary. As a protec- 

 tion against PhtJiorimaea operculella (potato tuber moth), the impor- 

 tation of Cahfornian potatoes into Canada is prohibited, while fresh 

 fruit and vegetables from the Hawaiian Islands have been prevented 

 from entry into Canada as a precaution against Ceratitis capitata 

 (Mediterranean fruit-fly). Ephestia kilhniella (Mediterranean flour 

 moth), Plodia inter punctella (Indian meal moth), Tribolium confiisum 

 (flour beetle), the Angoumois grain moth [Sitotroga cerealella], Tenebrio 

 molitor, Calandra oryzae and C. granaria have all been imported 

 during the year with rice, peas, beans, etc. for storage. These insects 

 do not apparently survive confinement in a cold storehouse. During 

 the last twelve years all such infested shipments have been fumigated 

 before being put into storage. The Vancouver rice-millers protested 

 against the expense of rice fumigation, which they considered un- 

 necessary, as it was claimed that all infection was destroyed in the 

 process of milUng. A special concession was therefore made allowing 



