. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 68 THE REPORT OF THE ' No. 36 The Pupa The pupa is about one-half inch long, is yellowish-brown in colour and has the shrivelled larval skin attached to the posterior end. It is found in the soil in a little earthen cell, at a depth of three to seven inches. Duration of Pupal Stage. An attempt was made to determine definitely the duration of this stage. Larvae and pupse were reared in pill boxes, but all succumbed before reaching the adult stage. Our observations in the field indicate that the inse
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 68 THE REPORT OF THE ' No. 36 The Pupa The pupa is about one-half inch long, is yellowish-brown in colour and has the shrivelled larval skin attached to the posterior end. It is found in the soil in a little earthen cell, at a depth of three to seven inches. Duration of Pupal Stage. An attempt was made to determine definitely the duration of this stage. Larvae and pupse were reared in pill boxes, but all succumbed before reaching the adult stage. Our observations in the field indicate that the insects are in the pupal stage about three weeks. Breeding Grounds During the latter part of May, a survey was made of sections of the infested area at Fenwick, in order to locate the principal breeding grounds. As a rule, in doing this work, the owner of the farm which was being surveyed was requested to accompany us, and in this way we were able to show the growers where the insects were Rose chafer larva or grub x 2. Rose chafer pupa (natural size). Some of the data secured from this survey are as follows: Neglected raspberry patches: Six plots (1 square yard) were examined and from 68 to 177 larvae and pupae per square yard were found, the average being 115. Uncultivated graperies: Seven plots were examined and from 16 to 135 insects per square yard were found, the average being 84. Land in grass during 1821-22: Nine plots were examined, and from 18 to 105 insects per square yard were found, the average being 45. Land in oats or wheat during 1921: Six plots were examined and from 20 to 51 insects per square yard were found, the average being 30. Well-kept lawns proved to be practically free. Rather to our surprise only an insignificant number of insects were found in roadsides at Fenwick. However, this fall at Oakville, roadside plots yielded from 40 to 184 larvae per square yard, with an average of 84. In land which had been planted to corn, potatoes or grapes, and
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
