Annual report of the Maine Agricultural Experiment Station . 6 c Fig. 2; a, larva; b, pupa; c, adult. (After Riley). The larva differs greatly from that of the round-headed name, flat-headed borer, is derived from the peculiar flatexpansion of the second thoracic segment—which is close tothe head. In color it is light yellow and in length measuresnearly twice that of the mature insect. It habitually rests ina curved position (fig. 2, a). The pupa (b) shows the form ofthe future beetle and is of the same yellow color as the larva. This borer attacks diseased or dying trees by preferen
Annual report of the Maine Agricultural Experiment Station . 6 c Fig. 2; a, larva; b, pupa; c, adult. (After Riley). The larva differs greatly from that of the round-headed name, flat-headed borer, is derived from the peculiar flatexpansion of the second thoracic segment—which is close tothe head. In color it is light yellow and in length measuresnearly twice that of the mature insect. It habitually rests ina curved position (fig. 2, a). The pupa (b) shows the form ofthe future beetle and is of the same yellow color as the larva. This borer attacks diseased or dying trees by preference,inhabits all parts of a tree from the base of the trunk to thelimbs, and is not restricted to fruit trees. In all these respectsit differs from the round-headed borer, but agrees with the latterin that it is injurious chiefly to young trees, its injuries beingpractically confined to newly transplanted nursery stock and totrees which have been weakened through any cause, such ascareless pruning, or insufficient nourishment due to poor soil ordrought. I
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
