Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . oth came out and most were out before the 4th ofAugust. I saw the moth at Sandwich as late as the 20th ofAugust. Most of the eggs laid in August do not hatch untilthe following spring. I did succeed in finding two or threelame in September, but they were rare at that time. Theonly sure means known of destining them, is to let water uponthe bog for twenty-four hours. Another Tortricid larva, which seems to differ generic-allyfrom the vine worm, in
Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . oth came out and most were out before the 4th ofAugust. I saw the moth at Sandwich as late as the 20th ofAugust. Most of the eggs laid in August do not hatch untilthe following spring. I did succeed in finding two or threelame in September, but they were rare at that time. Theonly sure means known of destining them, is to let water uponthe bog for twenty-four hours. Another Tortricid larva, which seems to differ generic-allyfrom the vine worm, in being thicker and having a larger,squarer prothoracic ring, and a less hairy body is called the Fruit-worm. According to Mr. Fish, these worms appear thefirst of August and work all through the month. The first signsof their presence are seen in the berries that are attacked turn-ing prematurely red. Most of them reach their full size beforethe first of September. In some places where the vines have been retarded by be-ing kept under wateruntil the first of Juneprevious (it is com-mon to cover the bogswith water when con-venient), they do not. t cc. & c Fig. 2(i reach their full size until a few weeks later. When fullygrown they enter the ground and spin their cocoons within afew inches of the surface. The cocoons are covered with grainsof sand and are hardly distinguishable from small lumps ofearth. They remain in the ground all winter. I do not knowpositively the perfect insect, as I have never been able to rearit in-doors. In the spring of 1867 I bred two species of Ich-neumons from these cocoons that had remained in the houseover winter. The Strawberry leaf-roller (A. fragarise Riley. Fig. 261 ; o,lines showing the dimensions of the moth ; a, larva, naturalsize ; b, the head and four succeeding rings of the body; rf,the terminal ring of the abdomen, showing the raial legs) has,according to Riley, recently been doing much injury to straw-berry plants in Illinois and Canada.
Size: 2668px × 937px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
