. The dock false-worm : an apple pest. Dock false-worm; Apples. BULLETIN 265, U. S. DEPARTMENT OF AGRICULTURE. FOOD PLANTS. The dock false-worm probably confines its feeding almost entirely to plants belonging to the buckwheat family (Polygonaceae), in- cluding the numerous docks and sorrels (Rumex), the knotweeds and bindweeds, or wild buckwheat (Polygonum), and others. It has been recorded from Polygonum bistorta in Scotland, and from Polygonum sp., Persicaria sp., and Rumex sp. in Germany. In America it has been recorded from the common knotweed {Poly- gonum lapathifolium and P. muhlenbergi
. The dock false-worm : an apple pest. Dock false-worm; Apples. BULLETIN 265, U. S. DEPARTMENT OF AGRICULTURE. FOOD PLANTS. The dock false-worm probably confines its feeding almost entirely to plants belonging to the buckwheat family (Polygonaceae), in- cluding the numerous docks and sorrels (Rumex), the knotweeds and bindweeds, or wild buckwheat (Polygonum), and others. It has been recorded from Polygonum bistorta in Scotland, and from Polygonum sp., Persicaria sp., and Rumex sp. in Germany. In America it has been recorded from the common knotweed {Poly- gonum lapathifolium and P. muhlenbergii), and from a yellow dock (Rumex patientia or brittanicus). The writer has taken it on P. lapathifolium, on bindweed or wild buckwheat (P. convolvulus), on sheep sorrel (Rumex aceioseUa), on curly dock (R. crispus), bitter dock (R. obtusifolius), and willow dock (R. salicifolius). It was also found by Chittenden and Titus (34) feeding on the leaves of the sugar beet (Chenopodiaccese). in a field where it had evidently con- sumed all of the dock and was forced by hunger to feed on this plant. The common cultivated buckwheat and rhubarb belong to the Polygo- nacese and may very well be food plants of this insect, though it has never been re- corded from them and the writer has not had the oppor- tunity of testing Several European writers have recorded a number of plants, not belonging to the buckwheat family, as food plants, but most of these are doubtful. Brischke (21) mentions loosestrife (Lythrum salicaria), and the common pansy (Viola tricolor). He was probably mistaken about the latter, in view of the fact that the larva? of several related sawfhes are known to feed on both the pansy and the violet. Kaltenbach (14) mentions goose-foot (Chenopodium album) and La- boulbene (16) mentions a reed (Arundo phragmitcs), but a careful reading of their papers shows that they merely found the prepupal larvae in the stems of these plants, which does not necessarily indicate that
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