. Insect pests of farm, garden and orchard . and was found by Dr. Riley in Missouri as early as 1869. The beetles were first noted in New Jersey in 1895, and have been injurious in Maryland and most of the Middle States. Life History.—The grubs, which bore into the stalks of the vines, * Trichobaris trinotata Say. Family Curcidiomdae. 285 286 INSECT PESTS OF FARM, GARDEN AND ORCHARD are the larvae of some small ashen-gray beetles which appear earlyin spring and into June. These beetles are about one-fourth of aninch long, with a long, black beak or snout, and are marked at thebase of the wing-
. Insect pests of farm, garden and orchard . and was found by Dr. Riley in Missouri as early as 1869. The beetles were first noted in New Jersey in 1895, and have been injurious in Maryland and most of the Middle States. Life History.—The grubs, which bore into the stalks of the vines, * Trichobaris trinotata Say. Family Curcidiomdae. 285 286 INSECT PESTS OF FARM, GARDEN AND ORCHARD are the larvae of some small ashen-gray beetles which appear earlyin spring and into June. These beetles are about one-fourth of aninch long, with a long, black beak or snout, and are marked at thebase of the wing-covers by three black spots which give the insectits specific name, trinotata. Each beetle punctures a small hole inthe base of a stem by means of its beak, hollows out a small cavity,and there lays a single small, oval, whitish egg. From these eggssome small, white grubs with brown heads hatch in a few days andcommence to bore into the stalk. These grubs keep eating, eitherin the main stalk or branches, from August 1st to September 1st,. Fig. 210.—Potato Stalk-borer (Trichobaris trinotata).adult. (After J. B. Smith.) Larva, pupa and when they have l^ecome full grown. At this time the grubs areabout one-half an inch long, of a dirty white or yellowish color,with a yellowish-brown, horny head, and without legs. About themiddle of August, as a general rule, the grubs construct small, ovalcocoons of chips and fibres in the stalk of the vine near the sur-face of the soil, and there transform to the pupa. During lateAugust and September the mature beetles shed the pupal skins, inwhich they have remained dormant for the last few weeks, butremain in the vines during the winter, and do not come forth tillthe following spring. Remedies.—On account of its internal feeding habits no poisoncan be successfully used against this pest, and the only remedy, INSECTS INJURIOUS TO POTATOES AND TOMATOES 287 but a good one, is to rake up the vines and burn them as soon asthe potatoes have bee
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