. Bulletin. Agriculture -- New Hampshire. July, 1914.] THE APPLE MAGGOT. 89 The Larva. Length, full-grown, 7 to 8 mm. Color white, or sometimes slightly yellowish or greenish. Anterior end pointed; posterior end somewhat blunt. The body thickest at the ninth to the eleventh; narrowing gradually and then rapidly to the first; narrowing slowly from the eleventh to the fourteenth. The fourteenth segment has the dorsal surface cut off diagonally downward. On this surface are two caudal spiracles. Within the second, third and fourth segments is a chiti- nous framework, visible by
. Bulletin. Agriculture -- New Hampshire. July, 1914.] THE APPLE MAGGOT. 89 The Larva. Length, full-grown, 7 to 8 mm. Color white, or sometimes slightly yellowish or greenish. Anterior end pointed; posterior end somewhat blunt. The body thickest at the ninth to the eleventh; narrowing gradually and then rapidly to the first; narrowing slowly from the eleventh to the fourteenth. The fourteenth segment has the dorsal surface cut off diagonally downward. On this surface are two caudal spiracles. Within the second, third and fourth segments is a chiti- nous framework, visible by transmitted light, which anchors a pair of black, chitinized, rasping hooks, projecting from the basal surface of the first segment. The first three segments are re- tracted into the fourth when the larva is disturbed. At the union of the third and fourth segments, on each side of the dorsal sur- face, is a yellowish, funnel-shaped, cephalic spiracle, connected. Fig. 2. Egg of the Apple Maggot—Enlarged. by a tracheal tube with the corresponding caudal spiracle. Trans- verse tracheal tubes connect the lateral tubes immediately anterior to the fifth and fourteenth segments. The Pupa. The pupa is enclosed within the shortened and hardened larval integument, forming the puparium. The latter is brownish, oval, the two ends somewhat evenly rounded. Length mm.; width mm. The first three segments of the larval integument are contracted, so that the cephalic spir- acles project anteriorly. The last segment contracted slightly but the caudal spiracles remain visible. The pupa within is white, the head tipped ventrally, the legs and wing buds closely folded. CONTROL MEASURES DIRECTED AGAINST THE ADULT. From the beginning of this investigation hope was enter- tained that some measure of control might be devised directed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookauthornewhampshireagricultu, bookcentury1900, bookdecade1910
