. The strawberry root weevil (Otiorhynchus ovatus Linn.) in British Columbia [microform] : with notes on other insects attacking strawberry plants in the Lower Fraser Valley. Strawberry-weevil; Insect pests; Insectes nuisibles, Lutte contre les; Anthonome de la fleur du fraisier; Strawberries; Fraises. 17 TTie movements of the larva in the month of November are deeidedlv less than during the earlier months. The general movement of thHaAi is doJ^ wards during the later months of the summer, as borne o 'by tredenthsTt which larva were found in September and October. It is luterestLf to note that
. The strawberry root weevil (Otiorhynchus ovatus Linn.) in British Columbia [microform] : with notes on other insects attacking strawberry plants in the Lower Fraser Valley. Strawberry-weevil; Insect pests; Insectes nuisibles, Lutte contre les; Anthonome de la fleur du fraisier; Strawberries; Fraises. 17 TTie movements of the larva in the month of November are deeidedlv less than during the earlier months. The general movement of thHaAi is doJ^ wards during the later months of the summer, as borne o 'by tredenthsTt which larva were found in September and October. It is luterestLf to note that expenments prove clearly the ability of larva to move in the soU^. (hart illustratinR dianramatically the life-history cif tlie Stiawberry Root Weevil {Oliorkynchuii ovalua) throughout the whole year. The chart indicates that the euKs may be found from June to August; larvffi may be found in month of the year; the pupal staws occur from the l>eKinnin« of May until after the middle of July, and iidultd may be found all the year round Within the heavy black line is shown the typical life-hislory of an individual insect (original)' Pupation.—As the period for pupation approacl es, the mature larva, by ' oiitinual feeding on the roots of the plant, has worked its way towards the surface •i the soil. Here pupation takes placo commonly at the depth of half an inch, sometimes two or three inches dei'p. , however, it has been noted tliat some larvae pass their entire life from the egg to the pupa in the surface /ones of the soil. Pupation occurs in a rough earthen cell formed by the larva 111 the soil. As a small proportion of the larva« Ijecomes full grown by winter, it 58164—3i. 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 Treherne, R. C. (Reginald Charles), 1886-1924; Canada. Div
Size: 1574px × 1588px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpubl, booksubjectinsectpests
