. Annual report of the North Carolina Agricultural Experiment Station. but kerosene emulsion of a strength of 10 per cent willkill the young nymphs when feeding in groups. Repellent sprays orpowders (See p. 43) are of some value. Clean Culture.—Burning all rubbish and old plants, both after thecrop is gathered and during fall or winter, will do much toward pre-venting the adult bugs from hibernating successfully. Squash Vine Borer (Melittia satyriniformis, Hbn.). Damage from this insect is caused by the larvse boring into thestalk, sometimes resulting in death of the infested stalk, and always
. Annual report of the North Carolina Agricultural Experiment Station. but kerosene emulsion of a strength of 10 per cent willkill the young nymphs when feeding in groups. Repellent sprays orpowders (See p. 43) are of some value. Clean Culture.—Burning all rubbish and old plants, both after thecrop is gathered and during fall or winter, will do much toward pre-venting the adult bugs from hibernating successfully. Squash Vine Borer (Melittia satyriniformis, Hbn.). Damage from this insect is caused by the larvse boring into thestalk, sometimes resulting in death of the infested stalk, and alwayscausing a loss of vitality. Squash and pumpkin are the favoritefood plants, but melons and cucumbers may be attacked. DESCRIPTION. Parent Moths.—The moths as described by Quaintance1 have fore-wings opaque, shining olive brown in color, and transparent hindwings bordered by a narrow fringe of scales. The body is aboutthree-fourths of an inch long, with a wing expanse of nearly one and Georgia Expt. Sta., Bui. 45, p. 47. 56 N. C. AGRICULTURAL EXPERIMENT Fig. 35.—Squash-Vine Borer. a, male moth ; 6, female moth, wingsfolded; q, eggs on stem ; d, larvae ; e, pupa; /, pupa cell—all one-thirdenlarged. ( Chittenden, Cir. 38, Bur. of Ent., Dept. of Agr.) one-fourth inches(Fig. 35, en-larged). Larvoe and Pu-pw.—The borersare about oneinch long, whitishin color and grub-1 i k e in grown,they leave theirburrows and spintough silken dirtcovered cocoons(Fig. 36) near the base of theplant from which they emerged. In this cocoon the larva changes toa pupa and eventually to an adult moth, which escapes through theend, as illustrated in Fig. 36. LIFE HISTORY. Observations on the life history of this insect, made in Georgia bythe writer, showed that the pupae stage was from three to four weeks, and that adults of the firstbrood appeared about thelast of June. The secondand last generation passthe winter i n cocoons,changing to moths inspring about the last ofApril.
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