. Insect pests of farm, garden and orchard . t, as well as many other insects and diseases, and if properlydone will result in no injury. This has been found satisfactoryin Delaware, but if farther south, the aphides winter on the roots,it would not be as effective. INSECTS IXJURIOirS TO THE STRAWBERRY 447 The Strawberry Crown-borer * Strawberry plants are often thvarfed or killed by a small whitelarva which mines out the interior of the crown, hollowing it outfrom the bases of the leaves to the larger roots. Usually l)utone grub is found in a plant, and it looks very much like a smallwhite gr
. Insect pests of farm, garden and orchard . t, as well as many other insects and diseases, and if properlydone will result in no injury. This has been found satisfactoryin Delaware, but if farther south, the aphides winter on the roots,it would not be as effective. INSECTS IXJURIOirS TO THE STRAWBERRY 447 The Strawberry Crown-borer * Strawberry plants are often thvarfed or killed by a small whitelarva which mines out the interior of the crown, hollowing it outfrom the bases of the leaves to the larger roots. Usually l)utone grub is found in a plant, and it looks very much like a smallwhite grub as it lies curled in its l^urrow. It is only about one-quarter inch long, and legless, the body being white and the headyellowish brown. The adult beetle is a small snout-beetle aboutone-fifth inch long, of a dark color, with head and thorax nearlyblack, and on each wing-co\Tr arc three black spots, the middleone being the largest and separated from the others by pale to Professor Garman the wings are too small to be used. Fig. 320.—The strawberry ero-mi-borer {Tyloderma fragrarice Riley): a, , c, beetle—enlarged. (After Riley.) for flight and this doubtless accounts for the slow spread ofthe pest. Injury has been reported from Illinois, Kentucky,Missouri, and Nebraska, but as the larva? might be readily shippedin plants, it is quite probable that it has become generallydistributed but has not done sufficient injury to attract History.—The beetles appear during the latter part ofsummer and fall and hibernate over winter in the soil, emergingearly the next spring. The eggs have not been observed, but areundoubtedly laid on the crown between the bases of the leavesin late spring. The larv?e develop in the crow^ns and become fullgrown by midsummer or August when they pupate in the cavities * Tyloderma fragrarice Riley. Family Curculionidoe. See S. A. Forbes,12th Report 111. State Ent., p. 64; 13th Report, p. 142; H. Garman, Bulletin80
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