Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . A piece of hickor> baik, uluiltaliiiK the work ot ^^^/^lus 4-spinosus and its larva:natural size. rilE INSECT WORLD. 239. Fruit-bark beetle, Scolytusntgulosus, much enlarged. These insects rarely attack sound, healthy trees, and this is apeculiarity of bark-beetles in general, though there are manyexceptions. But just as soon as a tree becomes a little weakenedthrough injury or from starvation, theselittle creatures attack it, and then itsdoom is sealed, unless vigorous me
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . A piece of hickor> baik, uluiltaliiiK the work ot ^^^/^lus 4-spinosus and its larva:natural size. rilE INSECT WORLD. 239. Fruit-bark beetle, Scolytusntgulosus, much enlarged. These insects rarely attack sound, healthy trees, and this is apeculiarity of bark-beetles in general, though there are manyexceptions. But just as soon as a tree becomes a little weakenedthrough injury or from starvation, theselittle creatures attack it, and then itsdoom is sealed, unless vigorous meas-ures are taken at once. Peach-trees areespecially susceptible to injury, and thegummy oozings from the little holesseem to weaken them so rapidly thatthey succumb in a short time. It is good practice to keep orchardtrees in the best possible health andvigor at all times to enable them to resistnaturally the attacks of these insects,but if one does become seriously infestedit should be at once cut out and is certain to die in a short time, and it is a constant menace to surrounding trees from the abundanceof specimens which will be produced, ready to attack others atthe least sign of weakness. Where a slight infestation is no
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
