563 



[Notes on Insect Pests.] — 16ih Ann. Rept. British Columhia Dept. 

 Agric, 1921, Victoria, 1922, pp. U12-U53. 



These notes are compiled from the reports of various district 

 inspectors. 



The strawberry root weevil [Otiorrhynchns ovatus] is becoming less 

 troublesome in Vancouver owing to the better methods adopted by 

 growers. On the lower mainland Epochra canadensis (currant-fly) did 

 severe damage to gooseberries, and Pennisetia {Bembecia) marginata 

 (root-borer) and Oberea himacnlata caused local trouble on raspberries. 

 A detailed report of campaigns against the codling moth [Cydia 

 pomonella] in various districts is given. Some new outbreaks were 

 discovered. Spraying and banding, and the inspection of foreign cars 

 are the measures most generally adopted. Aspidiotus perniciosiis 

 (San Jose scale) is still present locally on wild growth, but does not 

 appear to be spreading. Cutting and burning over infested patches of 

 bush has up to the present prevented re-infestation of the orchards, 

 but close watch must be kept for its possible reappearance. Contarinia 

 [Diplosis) tritici (wheat midge) damaged several hundred acres of 

 spring wheat in the Salmon River Valley. Remedial measures are 

 difficult, but an effort was made to have the refuse from the threshers 

 destroyed, thus reducing the numbers of over-wintering pupae. 

 Farmers are advised not to plant wheat crops for several years, or at 

 least only autumn wheat, as this is practically immune. Eriopkyes 

 pyri (pear-leaf blister mite) increased rapidly in the same district in 

 1920, but with careful spraying the damage has been lessened. Pears 

 only were attacked. Where the dormant spray (lime-sulphur 1 : 9) 

 was properly applied for two seasons, the pest was practically eradicated. 

 Anarsia lineatella (peach-twig borer) entirely spoiled peaches and 

 apricots in some badly kept orchards but caused little trouble elsewhere. 

 Eriocampoides limacina (pear and cherry slug) did a certain amount of 

 damage locally, but is not difficult to control. The Colorado potato 

 beetle [Leptinotarsa decemlincata, Say] has become established over a 

 considerable area in East Kootenay. The tussock moth [Hemerocampa 

 sp.] has appeared in some of the older orchards and was held in check 

 by lead arsenate sprays. Other pests requiring remedial measures 

 were leaf-hoppers, red-humped caterpillar [Schiziira concinna] and a 

 hawk moth {Sphinx elegans). HcUothis ohsoleta {armigera) (corn ear 

 worm) has recently been discovered for the first time in British 

 Columbia. 



RuHMANN (M. H.). Report o£ the Assistant Entomologist, Vernon.— 



16th Ann. Rept. British Columbia Dept. Agric, 1921, Victoria, 

 1922, pp. U69-U73. 



The pests that were recorded in addition to those in the preceding 

 paper included Enarmonia prunivora (lesser apple worm), which was 

 unusually abundant and caused serious losses to the apple and cherry 

 crops. Vitula serratilincela (wax moth), which is generally considered 

 to be a dried fruit insect, occurred in numbers in nearly mature apples, 

 and in combs in bee-hives. Phorbia [Hyleniyia) brassicae (cabbage root 

 maggot) was more abundant than usual and caused heavy damage ; the 

 few growers who used bichloride of mercury solution against it suffered 

 no loss [R.A.E., A, ix, 582]. A species of Eriophyes (probably E. 

 pyri) did much injury to apples, and seems to require different treatment 

 from the mite on pears. Eriosoma lanigenmi (woolly apple aphis). 



