BEANS OR BEETLES Part 3
Description
Shows the effects of the Mexican bean beetle on bean plants, the life cycle of the beetle, and methods of eradicating the pest. Bean fields are sprayed with magnesium arsenate and dusted with tri-calcium arsenate. Contrasts productive, beetle-free fields with neglected areas.
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Records of the Extension Service
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Date
1925-01-01
File
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TRT
3:41
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