Insects injurious to fruits . , a feature which will enable any personreadily to distinguish the one from the other. The rasp-berry root-borer belougs to the same family of clear-wingedmoths as the peach-borer, and there is a striking resem-blance between the two species in the several stages of theirexistence. Both the male and the female moth are shown in Fig. 313,where a represents the male, and b the female. The frontwings are transparent, veined withblack or brownish, and heavily mar-gined with reddish brown ; the hindwings are transparent, with dark veins,and both wings are fringed with
Insects injurious to fruits . , a feature which will enable any personreadily to distinguish the one from the other. The rasp-berry root-borer belougs to the same family of clear-wingedmoths as the peach-borer, and there is a striking resem-blance between the two species in the several stages of theirexistence. Both the male and the female moth are shown in Fig. 313,where a represents the male, and b the female. The frontwings are transparent, veined withblack or brownish, and heavily mar-gined with reddish brown ; the hindwings are transparent, with dark veins,and both wings are fringed with darkbrown. The body is black, prettilybanded and marked with golden yel-low, as in the figure. The wings,when expanded, will measure fromthree-quarters of an inch to an inchacross. The eggs are said to be depositedby the female during the hot summerweather on the leaves of the raspberry, and the young larva,when hatched, finds its way from these to the stem or cane,and there feeds upon the pithy substance in the interior, 303. 304 INSECTS INJURIOUS TO THE RASPBERRY. and gradually channels the cane to the root, in which itspends the winter months, forming before spring cavitiesof considerable extent. As the spring opens, it works itsway up again, usually through the interior of another cane,to a height of five or six inches, where the larva, hi pre-j)ariug for the exit of the future motli, eats the cane in oneplace nearly through, leaving a mere film of skin full grown, it is about an inch long, of a pale-yellowcolor, with a dark-brown head, and a few shining dots oneach segment of the body. Within the cane, and near thespot specially prepared by the larva, the change to a chrys-alis takes place, and when the time approaches for the mothto escape, the chrysalis wriggles itself forward, and, pushingagainst the thin skin remaining on the cane, ruptures it, and,forcing its way through the opening, there awaits the escapeof the moth, which usually takes place within a
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Keywords: ., bookcentury1900, bookdecade1900, bookidin, booksubjectinsectpests
