. Bulletin of the Department of Agriculture. Agriculture. THE BLACKHEAD FIREWORM OF CRAXBERRY. 7 DESCRIPTION OF STAGES AND HABITS. THE EGG. The egg of the bhickhead fireworm is smooth, slightly elliptical, with the center partially raised and rounded. It measures approxi- matel}^ millimeter wide, or about the size of the head of a very small pin. When first laid it has a slight opalescent sheen and a light lemon-yellow color which changes to a deeper yellow in about two weeks. The hatched egg is more inconspicuous, being trans- parent and appearing much like a small drop of albumin w
. Bulletin of the Department of Agriculture. Agriculture. THE BLACKHEAD FIREWORM OF CRAXBERRY. 7 DESCRIPTION OF STAGES AND HABITS. THE EGG. The egg of the bhickhead fireworm is smooth, slightly elliptical, with the center partially raised and rounded. It measures approxi- matel}^ millimeter wide, or about the size of the head of a very small pin. When first laid it has a slight opalescent sheen and a light lemon-yellow color which changes to a deeper yellow in about two weeks. The hatched egg is more inconspicuous, being trans- parent and appearing much like a small drop of albumin which has dried on the leaf. (Fiir. 1.). Fic. 1.—Eggs of the blackhoad flrevvorm moth on the undersides of the cranberry leaves, enlarged times: a. Winter eggs; h. eggs in the " black-spot" or first stage of devel- opment ; c, hatched eggs. Hibernation. The eggs are laid by the parent moth singly or in groups on the underside of the cranberry leaves; rarely, a few eggs will be found deposited on the upper surface of the leaves. On the badly infested bogs as many as 10 or 12 eggs may be found on the underside of a single leaf. The majority of the wintering eggs are usually deposited on the leaves on the lower portions of the vines, the short, low up- rights near the ground generally containing the greatest number of eggs. During picking season and the following winter, many of these leaves are dislodged from the vines, and it is not an uncom- mon thing to find them on the l)og floor bearing numerous eggs. An infestation may easih" be distributed from one part of a bog to. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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