A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fig. 68.—The Red-legged Locust(Melanoplusfemur-rubrum): female.[After Kiley.] Fig. 69.—Rocky Mountain Locust(Melanoplus spretus): male. [AfterRiley.]. Fig. 70.—if. devastator. Fig. 71.—The Two-lined Locust (Melanoplus Mvit-tatus). [After Riley.] some artificial measures must be resorted to if we wish to keep thehoppers within bounds and prevent their injury to

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A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fig. 68.—The Red-legged Locust(Melanoplusfemur-rubrum): female.[After Kiley.] Fig. 69.—Rocky Mountain Locust(Melanoplus spretus): male. [AfterRiley.]. Fig. 70.—if. devastator. Fig. 71.—The Two-lined Locust (Melanoplus Mvit-tatus). [After Riley.] some artificial measures must be resorted to if we wish to keep thehoppers within bounds and prevent their injury to crops. Suchremedies have been numerous, but the ones that have proved the mostefficient are plowing under deeply the eggs before they should have hadtime to hatch, and the capturing of the unfledged locusts by means of hopper dozers. (See Fig. 72.) These latter are shallow sheet-ironpans in which are put coal tar or kerosene oil and drawn over the ground

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894