Common Injurious Insects of Kansas (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Common Injurious Insects of Kansas

When we come to consider remedies, it is evident at once that remedies whose effectiveness consists in the fact that the foliage which is eaten by the insects is poisoned by being covered With' a coating of some arsenical mixture cannot be used against sucking insects who get their food from the inside of the leaves. And it is evident that barriers around tree trunks, or around plats of ground, which might surely prevent the progress of the Wingless caterpillars and worms, would not at all prevent the winged adult forms (the moths, etc.) of the insects - which adult forms lay the eggs from which the caterpillars are hatched - from getting into the tree tops, or into the plats of ground.

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