. 1st report of Dr. Fitch on the noxious, beneficial and other insects, detrimental to agriculture, made to the New York State Agricultural Society. Beneficial insects; Insect pests; Insects. PEACH. ROOT THE BORER. THE WORM DESCRIBED. 113 cause of the mischief, several of the worms being present in the roots. This, taken in connection with the modification which the habits of the worm undergo whpn in this situation, is a remarkable fact. Altliough the plum abounds in gum like the peach, none of this gum exudes from Its root when attacked by this borer. The worm, therefore, having no covering t
. 1st report of Dr. Fitch on the noxious, beneficial and other insects, detrimental to agriculture, made to the New York State Agricultural Society. Beneficial insects; Insect pests; Insects. PEACH. ROOT THE BORER. THE WORM DESCRIBED. 113 cause of the mischief, several of the worms being present in the roots. This, taken in connection with the modification which the habits of the worm undergo whpn in this situation, is a remarkable fact. Altliough the plum abounds in gum like the peach, none of this gum exudes from Its root when attacked by this borer. The worm, therefore, having no covering to protect it, does not erode the bark and nestle upon the out- side of the root of the plum as it does in the peach, but lies under the bark and subsists entirely upon the soft sap-wood of the root. Commencing slight- ly below the surface of the ground it works its way downwards immediately under the bark for a dis- tance of about four inches, forming a long and some- what irregular cylindrical channel. The annexed cut shows this burrow as it appears when the bark is removed from the root. As the worm moves along it packs its castings, which appear like a tan colored powder, into the channel behind it. This is an important fact, showing that if no peach trees were cultivated in our country this species would still sustain itself without difficulty in the roots of the plum. Indeed, as this insect is a ' Native American,' wholly unknown in the peach trees of other countries, it is quite probable that before the peach was in- troduced upon this side of the Atlantic it bred exclusively in our indigenous species of plums, and has now almost entirely forsaken these and attached itself to this, more congenial The LAKVA is a naked soft white cylindrical grub, slightly flattened on its under side (of which the left hand figure of the accompanying cut gives a view), and when full grown measures over half an inch in length and nearly a quarter of an inch in diameter. It is div
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectb, booksubjectinsects
