. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. THE BUTTERFLIES AND MOTHS 115 upper or blossom end of the apple a few particles of poison, so that when the newly hatched worm nibbles at the skin, it is likely to eat one or more of these particles and be killed. Two sprayings are generally desirable; the first less than a week after the petals fall, and the second ten days or two weeks after the first. Leaf Rollers and Leaf Miners Examples of the great group of Leaf Rollers, several families of which are commonly classed
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. THE BUTTERFLIES AND MOTHS 115 upper or blossom end of the apple a few particles of poison, so that when the newly hatched worm nibbles at the skin, it is likely to eat one or more of these particles and be killed. Two sprayings are generally desirable; the first less than a week after the petals fall, and the second ten days or two weeks after the first. Leaf Rollers and Leaf Miners Examples of the great group of Leaf Rollers, several families of which are commonly classed together into one superfamily (Tortricina), are easily found wherever there are trees or shrubs in variety. These insects are espe- cially characterized by the ability of the larvae to fasten together the edges of leaves by means of silken threads. Sometimes it will be a single leaf cleverly rolled into a tube, and at other , ^ •' ' Leaf Roller Moth times it will be a number of leaves upon the same branch, sewed together to make a tent. In either case, the leaves thus united are utilized as a home for the young caterpillars, that feed upon the green sub- stance on the inside, and so escape, to a large extent, the attacks of birds. When fully grown, the caterpillars change to pupae, either in the webbed home or in some other shelter, and a little later they change again into small moths. One of the commonest examples of this great group is the so- called Rose Leaf Roller, which is also often found upon the leaves of apple and many other trees. Fortunately in the case of most Leaf Rollers, the protecting web does not prevent the access of parasitic flies which destroy the caterpillars in great numbers. The smallest of the scale-winged insects belong to the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original We
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
