. The American fruit culturist. e the cost of jarring trees in this manner a season isfrom 10 to 20 cents per tree, which is a small amount to ex-pend to ensure a crop worth many times as much. After beingcaptured on the sheets, the curculios may be destroyed bythrowing them into boiling water, into kerosene, or some burnthem in small charcoal furnaces. A few minutes work isoften sufficient for many trees, and labor equal in the aggre-gate to that of a single entire day may save large and valu-able crops. The Plum Ganger {Coccotonis scutellaris).—In the northernportion of the M
. The American fruit culturist. e the cost of jarring trees in this manner a season isfrom 10 to 20 cents per tree, which is a small amount to ex-pend to ensure a crop worth many times as much. After beingcaptured on the sheets, the curculios may be destroyed bythrowing them into boiling water, into kerosene, or some burnthem in small charcoal furnaces. A few minutes work isoften sufficient for many trees, and labor equal in the aggre-gate to that of a single entire day may save large and valu-able crops. The Plum Ganger {Coccotonis scutellaris).—In the northernportion of the Mississippi Valley this insect is often equallyas destructive to plums as the plum-curculio, which it closelyresembles. The female gouger deposits her eggs in the youngfruit, making a round hole, but no crescent cut, and the griibfeeds upon the kernel of the pit, in which it also transformsto the beetle. The rest of its life-story is much like that ofthe plum-curculio. Poisonous sprays do not seem to check it, but otherwise it. DESTRUCTIVE INSECTS. 191 is amenable to the same remedial measures as the plum cur-culio. The Black Peach Aphis {Aphis prtmicola) is a brownish-blackplant-louse (Fig. 257) infesting the leaves, twigs, and roots ofpeach-trees. Trees less than three years old suffermost from its ravages. Thousands of such trees have beenkilled by it in Eastern peach-grow-ing districts, and the pest has in-vaded Northern orchards. Peach stocks should be care-fully examined before setting, andif there are any indications ofplant-lice on them, they should bedipped in a strong kerosene emul-sion or whale-oil soap solution. Itis a difficult matter to destroy thelice on the roots after the tree is ^i^. Black Peach ,_, , , , ,, - T . Aphis, wingless form, much set. Tobacco dust well worked m eniarc^edaround the base of the trees has given relief in some cases. The lice which work on the treeabove ground can be killed with a spray of kerosene emul-sion diluted te
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