Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 156 Elementary Principles of Agriculture 'The House that Jack Built.' The female lays the egg; the egg hatches into the larva (caterpillar, grub, or mag- got) ; the larva feeds and grows and turns into a chrysalis, or pupa, and from this pupa comes the adult insect. Take the common May-beetle, or June-bug as an ex- ample. (Fig. 94.) The adult lays the egg among grass roots during spring or summer. From this then hatches a small larva (white grub,
Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 156 Elementary Principles of Agriculture 'The House that Jack Built.' The female lays the egg; the egg hatches into the larva (caterpillar, grub, or mag- got) ; the larva feeds and grows and turns into a chrysalis, or pupa, and from this pupa comes the adult insect. Take the common May-beetle, or June-bug as an ex- ample. (Fig. 94.) The adult lays the egg among grass roots during spring or summer. From this then hatches a small larva (white grub, or 'grub-worm'), w^hich feeds on the roots in the soil. It grows rapidly, and, at the end of the second season, goes into a dormant state and changes into a pupa, and, at the end of two years, emerges from the ground as a May-beetle, or June-bug. In the larval stage, the June-bug often does much damage to the roots of grasses, corn, wheat and garden plants, while the adult feeds on the leaves of trees—often fruit trees. The caterpillar stage in insect development is quite Fig. 95. Plum curculio. A, larva inside of peach; B, mature insect depositmg egg. After Quaintance, United States Department of Agriculture.
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