A sealed paper carton to protect cereals from insect attack . Fig. 2.—The Mediterranean flour moth (Ephestia kuehniella): a, Moth;6, same from side, resting; c, larva; d, pupa; e, abdominal segmentsof larva, a-d, Enlarged; e, more enlarged. (After Chittenden.) A SEALED PAPER CAETON TO PEOTECT CEREALS. 3 insects or eggs in them the heat from the cereal would undoubtedlyhave killed them. When the ends of the packages were being fastened, the glue was notplaced near the corners, so that if it were possible to leave an openingthere by accident, the opening would be left in this experiment. Allof t
A sealed paper carton to protect cereals from insect attack . Fig. 2.—The Mediterranean flour moth (Ephestia kuehniella): a, Moth;6, same from side, resting; c, larva; d, pupa; e, abdominal segmentsof larva, a-d, Enlarged; e, more enlarged. (After Chittenden.) A SEALED PAPER CAETON TO PEOTECT CEREALS. 3 insects or eggs in them the heat from the cereal would undoubtedlyhave killed them. When the ends of the packages were being fastened, the glue was notplaced near the corners, so that if it were possible to leave an openingthere by accident, the opening would be left in this experiment. Allof the packages were regularly closed by gluing the ends, but some ofthem were covered by a piece of label paper (fig. 7) so that there wereno openings where an insect could enter without piercing the of the labels were put on with glue and some with flour paste. Eighteen of these packages, nine labeled and nine not labeled, weredistributed in two wooden boxes. Between them flour and meal that. Fig. 3.—The confused flour beetle ( Tribolium confusum): a, Beetle; b, larva; c, pupa; d, lateral lobe ofabdomen of pupa; e, head of beetle, showing antenna; /, same of T. ferrugineum. a-c, Much enlarged;d-f, more enlarged. (After Chittenden.) were badly infested by the confused flour beetle, the saw-toothedgrain beetle, and the Mediterranean flour moth were packed. Thisinfestation of the boxes was very carefully done, and when the experi-ment was observed on November 10, 1912, the outsides of all of thepackages were literally alive with insects. The condition of the con-tents of eight of them is recorded in Table I. Table I.—Recorded conditions of infestation or noninfestation found in packages of cereal opened Nov. 10, 1912. No. of pack-age. Not labeled. Label pasted. Label glued. 1 2 do 3 do 4 do 5 No infestation do 6 7 No infestation. 8 Do. A similar observation was made on January 24, 1913, the results ofwhich are shown in Table II. 4 BULLETIN 15, U. S. DEPAETMENT OF AG
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1913
