The More Important Insect Injuries to Indian Corn: General Introduction to ...
The More Important Insect Injuries to Indian Corn: General Introduction to ...
Stephen Alfred Forbes
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En- larged. Digitized by VjOOQIC 1904.] Insect Injuries to Indian Corn. 369 It fed likewise on potatoes, beans, sweet potatoes, cabbage, tomatoes, and onions. When very abundant and their food supply had run short, these cutworms scattered in all directions — ^a habit common in varying degrees to most of the cutworms. Its mode of.feeding is different from that of the cutworms generally, the com leaf being seized by the hang- ing tip, drawn down, and eaten to the base. In clover fields, it begin...s at the tip of the plant and works downward, collecting about the roots. This species is registered as inhabiting the United States east of the Rocky Mountains, but we have specimens of the adult from Utah and Colorado also. It spends the winter, in our latitude, in the caterpillar stage, and is active in the destruction of its food plants from the middle of April to the beginning of June. By the middle of Jime all the cutworms have entered the earth for transformation. They do not change forthwith to the pupa stage, but remain there for a considerable period — ^more than six weeks in some cases — ^in a dormant or torpid condition.
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