. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. usually is placed under one of the lobes at the blossom end of the berry (fig. 42) but sometimes is elsewhere on the surface. More than one or two are seldom found on a berry unless the infestation is very severe. Fig. S shows an egg turned dark by parasitism, and fig. T the shell of a hatched egg. Egg laying begins when the small berries start to grow and sometimes con- tinues till late August. The normal eggs hatch in about five days and eggs parasitised by Phanerotoma or Pristomeridia in about eight da
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. usually is placed under one of the lobes at the blossom end of the berry (fig. 42) but sometimes is elsewhere on the surface. More than one or two are seldom found on a berry unless the infestation is very severe. Fig. S shows an egg turned dark by parasitism, and fig. T the shell of a hatched egg. Egg laying begins when the small berries start to grow and sometimes con- tinues till late August. The normal eggs hatch in about five days and eggs parasitised by Phanerotoma or Pristomeridia in about eight CRANBERRY Fig. S. Egg blackened by Trichogramma parasitism. Fig. T. Shell of hatched egg. Greatly enlarged. Greatly enlarged. THE WORM The normal mature worm (fig. 43) is about hall an inch long and is green. often tinged with reddish on the back. The head is yellowish. The parasitised worms seldom become much over a third of an inch long. The caterpillars are generally most active from about July 12 to about August 30, but often some work in the berries well into September. When through feed- ing, they go down to the sand under the vines, on or near the surface of which they make oval cocoons (fig. 44) of sand and silk or of fallen cranberry leaves webbed together. Those of the normal worms generally are a little over three- eighths of an inch long, but those of parasitized ones are smaller and frailer. They are not impervious to water, for when submerged they nearly fill up in about five days. The worms in them generally are not much affected by cold water and some live through the winter under bog flowage. THE PUPA Pupation occurs within the cocoons in late May and June on dry bogs and bogs drained of their winter water before mid-April. The pupa is pale greenish at first but soons turns yellowish brown and becomes dark brown before the moth emerges. THE MOTH The moths occur from very late May till after mid-August. They hide among the vines during the day an
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