Annual report of the North Carolina Agricultural Experiment Station . Fig. 14.—Feeding Tube made in bran by the larva of the Meal Snout Moth—slightly reduced. The pupa stage is assumed in a tough silken cocoon covered withparticles of food, as illustrated at Fig. 13, b, an open cocoon being CORN WEEVILS AND OTHER GRAIN INSECTS. 21 shown at c. The pupa is light reddish-brown and of the formillustrated. Fig. 15 shows a small section of a bran bin covered withmeal-worm cocoons, which were equally numerous on all sides. Concerning the life-history, this species passes the cold months inthe larval
Annual report of the North Carolina Agricultural Experiment Station . Fig. 14.—Feeding Tube made in bran by the larva of the Meal Snout Moth—slightly reduced. The pupa stage is assumed in a tough silken cocoon covered withparticles of food, as illustrated at Fig. 13, b, an open cocoon being CORN WEEVILS AND OTHER GRAIN INSECTS. 21 shown at c. The pupa is light reddish-brown and of the formillustrated. Fig. 15 shows a small section of a bran bin covered withmeal-worm cocoons, which were equally numerous on all sides. Concerning the life-history, this species passes the cold months inthe larval stage, and at West Raleigh the first moths emerged thisyear on April 20. Three or four generations annually are creditedto this insect. As a grain pest the meal snout moth is not of great its various foods may be mentioned hay, straw, seeds, driedplants, all grains and the products made therefrom, and masses of. FlG. 15.—Showing cocoons of the Meal Snout Moth on the side of a grain bin in whichbran was kept. refuse vegetable matter, such as potatoes. Evidently this insect flour-ishes best in moist surroundings and is not liable to thrive in materialstored in a dry, clean place. As remedial measures the destruction of infested material andcleaning-ont of places where the worms are discovered are by far thebest. Fumigation with carbon bisulphide might be effective againstthe caterpillars in a perfectly tight box or bin, but it is doubtful ifthe pupa in their cocoons can be killed by any ordinary strength. Inthe bran bin in which the worms were discovered (see Fig. 15), asalready mentioned, carbon bisulphide was used this year at the rate 22 N. G. AGRICULTURAL EXPERIMENT STATION. of five, ten, fifteen and twenty pounds, respectively, per thousandcubic feet, on April 7, 10, 14, and 15, and after the fourth treatmentsome of the pupae were alive and have since transformed to bin was ap
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