. Manual of fruit insects. piracles are in the center of blotchesof reddish-brown. A Tachina fly parasite is killing some of the caterpillars inBritish Columbia. This imported pest will doubtless succumbto the same remedial treatment as the native species. Bruces Measuring-worm Rachela bruceata Hulst This insect was first described from western New York in1886, where a few years later it was quite injurious in apple orchards and on maple trees. Millions of the caterpillars ap-peared in Alberta, Canada, in1902, and the following yearhundreds of acres of Americanaspen or poplar trees were de-nud
. Manual of fruit insects. piracles are in the center of blotchesof reddish-brown. A Tachina fly parasite is killing some of the caterpillars inBritish Columbia. This imported pest will doubtless succumbto the same remedial treatment as the native species. Bruces Measuring-worm Rachela bruceata Hulst This insect was first described from western New York in1886, where a few years later it was quite injurious in apple orchards and on maple trees. Millions of the caterpillars ap-peared in Alberta, Canada, in1902, and the following yearhundreds of acres of Americanaspen or poplar trees were de-nuded in June. The moths havebeen found in British Columbiaalso. The wingless female moths areabout one third of an inch long,light brownish-gray, and closelyresemble the females of the fallcanker-worm, differing in beingonly about two thirds as large and in having slightly longer stubs of wings (Fig. 100). Thewinged male moths have a wing expanse of about 1| inchesand are of a general very pale brownish color, the wing veins. Fig. 100. — Bruces measuring-worm,female moth (X 4). 94 FRUIT INSECTS being quite distinctly outlined by darker scales (Fig. 101). Themoths emerge and go up the trees for egg-laying at night inOctober and November. The reddish-orange, oval, finely pitted
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1915
