. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . The yellow-necked caterpillar, a; its parent, Datana ministra, at b; eggs, natural size and enlarged, at c and (/. brown lines ; and this species is Datana viinistra. It lays its white eggs to the number of nearly one hundred on the under side of apple and other leaves in a single layer. Similar cater- pillars may be found on a variety of other plants. The sumach is often defoliated, walnut- and oak-trees have their own species, and in all cases the moths have the gener
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . The yellow-necked caterpillar, a; its parent, Datana ministra, at b; eggs, natural size and enlarged, at c and (/. brown lines ; and this species is Datana viinistra. It lays its white eggs to the number of nearly one hundred on the under side of apple and other leaves in a single layer. Similar cater- pillars may be found on a variety of other plants. The sumach is often defoliated, walnut- and oak-trees have their own species, and in all cases the moths have the general appearance already described. Insects that feed thus in company are controlled without difficulty, if we attack them as soon as the colony has hatched. They are then confined to a few leaves, and if these be picked off" and destroyed, injury is avoided for the season. If this is not possible, or the colony has already spread too great a distance, then spraying the infested brancli with arsenites will answer every purpose. There are other caterpillars of this family that attack fruit-trees, but as a rule in such small numbers as to be harmless. Oak-trees are occasionally attacked and defoliated by cater- pillars about an inch and a quarter in length, with a yellow head,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1
