. Insect pests of farm, garden and orchard . margins. The full-grown larva is about three-quarters inch long and of atranslucent greenish-white color. Down the middle of the back * Phlyctaenia rubigalis Guen. Family Pyralidoe. See F. H. Chittenden,Bulletin 27, n. s., Div. Ent., U. S. Dept. Agr.; M. V. Slingerland, Bulletin190, Cornell Univ. Agr. Exp. Sta., p. 159. 410 INSECT PESTS OF FARM, GARDEN AND ORCHARD is a narrow green stripe, which is bordered on either side by awider greenish-white stripe. The head is dark straw color,mottled with darker, often purplish dots. The species is widelydist
. Insect pests of farm, garden and orchard . margins. The full-grown larva is about three-quarters inch long and of atranslucent greenish-white color. Down the middle of the back * Phlyctaenia rubigalis Guen. Family Pyralidoe. See F. H. Chittenden,Bulletin 27, n. s., Div. Ent., U. S. Dept. Agr.; M. V. Slingerland, Bulletin190, Cornell Univ. Agr. Exp. Sta., p. 159. 410 INSECT PESTS OF FARM, GARDEN AND ORCHARD is a narrow green stripe, which is bordered on either side by awider greenish-white stripe. The head is dark straw color,mottled with darker, often purplish dots. The species is widelydistributed, occurring in practically all parts of the United States,and may be readily introduced into greenhouses upon History.—The eggs are very much flattened, translucent,broadly oval disks about one thirty-second inch long, laid in clus-ters of from eight to twelve, several often overlapping. The eggshatch in from five to twenty days, according to the larvffi feed mostly at night and become full grown in from. Fig. 296.—The celery leaf-tyer {Phlydania rubigalis Hbn.): a, moth; ^>,same in natural position at rest; c, egg mass; d, larva from above; c,same from side; /, head of same; g, pupa case; h, chrysalis—one-halflarger than natural size except c, which is twice natural size, and /,more enlarged. (After Chittenden, U. S. Dept. Agr.) three to five weeks. They transform to pupse within the webswhich they have formed between the leaves, and the mothsemerge one or two weeks later. The number of generationswhich occur out of doors and the method of hibernation have notbeen determined, but there are probably at least three generationsin the open, while the number in greenhouses will depend uponthe. temperature and the food available. Control.—No very thorough experiments in the practical con-trol of the pest on field crops seem to have been made. A thoroughapplication of arsenate of lead as soon as the young larvae arenoticed and before they
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