. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 7 BLACK-HEADED FIREWORM Fig. 5. Cranberry leaves with fruiting bodies of a fungus (Venturia compacta Pk.) often mistaken by growers for its eggs. Much enlarged. Fig. 6. ^.arva. Considerably enlarged. Fig. 7. Moth. Much enlarged. (From U. S. Dept. Agr. Farmers* Bui. 860.) THE PUPA The mature worms generally leave the vines to pupate on the sand or in the trash beneath them. The pupa often is naked but usually is in a light case of silk and sand or fallen leaves. If water happens to be standing under the vi
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 7 BLACK-HEADED FIREWORM Fig. 5. Cranberry leaves with fruiting bodies of a fungus (Venturia compacta Pk.) often mistaken by growers for its eggs. Much enlarged. Fig. 6. ^.arva. Considerably enlarged. Fig. 7. Moth. Much enlarged. (From U. S. Dept. Agr. Farmers* Bui. 860.) THE PUPA The mature worms generally leave the vines to pupate on the sand or in the trash beneath them. The pupa often is naked but usually is in a light case of silk and sand or fallen leaves. If water happens to be standing under the vines, the worms pupate among the webbed foliage. They used to do this quite generally in Wisconsin, probably because most of the vines there were poorly drained. The pupa is light brown at first, but it gets almost black before the moth emerges. The pupal period of the first brood is nearly two weeks, and that of the second brood about a week and a half. THE MOTH The moth (fig. 7 and Plate One, fig. 6) is dark grayish brown and so small that it is often mistaken for a fly when in flight. It expands somewhat over three-eighths of an inch. The forewings are marked with graybrown and silver'gray bands. The female may lay eggs within a day after it emerges. The moths fly little during the day unless it is warm and very cloudy, but they are flushed up easily. At dusk they fly and hover freely just above the vines. {9]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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