. Cutworms and army-worms [microform]. Insect pests; Army-worms; Cutworms; Légionnaires (Chenilles); Insectes nuisibles; Vers gris. 23 Yellow-headed Cutworm, but fiom the colour of the heads, it is usually an easy matter to distinguish Fig- 8—Glassy Cutworm: moth an I catorpilbr. The fore-wings of the moth vary in colour from pale ashy-gray to dark brown- ish-gray. The transverse lines are usually distinct, the subterminal one near the outer margin being the most conspicuous and in some specimens almost whitish. On the inner side of this line art a series of short arrow-like dashes The
. Cutworms and army-worms [microform]. Insect pests; Army-worms; Cutworms; Légionnaires (Chenilles); Insectes nuisibles; Vers gris. 23 Yellow-headed Cutworm, but fiom the colour of the heads, it is usually an easy matter to distinguish Fig- 8—Glassy Cutworm: moth an I catorpilbr. The fore-wings of the moth vary in colour from pale ashy-gray to dark brown- ish-gray. The transverse lines are usually distinct, the subterminal one near the outer margin being the most conspicuous and in some specimens almost whitish. On the inner side of this line art a series of short arrow-like dashes The usual round and kidney-shaped spots are large, the former being the paler The hind wings are brownish, the inner half being paler. Habits and life-history. Unlike most of our other cutworms, this species sel- dom comes above the surface of the ground, even during the night. It feeds chiefly upon the roots and lower stems of various kinds of grasses, such as wheat oats, corn and grass in meadows, and, as a rule, is only troublesome in grain fields sown on grass lands which have recently been ploughed up. In addition, how- ever, to grasses, this cutworm also attacks garden plants such as cabbages, beans lettuce, etc. In Ontario it has injured seriously fields of oats 15 to 20 acres in size, between May 10 and 25, and also has been troublesome in fields of com Fields of fall wheat have also been damaged in May and earW .June, to such ati extent, that it was necessary to plough them up. In Manitoba, also, much injury has been done in wheat fields. The insect is widely distributed in North America, and in Canada the motlis have been found commonly from Nova Scotia across to British Columbia. It flies from late June until the middle of September. Eggs arc laid in the latter part of the season; the young larva emerge soon afterwards and hibernate in a partly grown condition. Larvas found in Ontario in May (1906) became full-grown and pupated on May 19, the moths emerging on July 19
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
