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 218.— V Kaapaack Sprajer in nse, second an arsenite of lime. The first two are preferable to white arsenicitself for use as insecticides on account of their color, which acts as asort of a safeguard against accidents, and also from the fact that theyare more readily held in suspension in the liquid while being used. The.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894