. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 38 BULLETIN 427, U. S. DEPAKTMENT OF AGEICULTURE. 1915. February 23.—1 Sympiesis stigmatipennis adult issued. (Female.) February 25.—3 Sympiesis stigmatipennis adults issued. (Males.) Life cycle 26 days at average mean temperature of about 52° F. Longest life cycle noted, 45 days. CAMPOPLEX PHTHORIMAEAE CUSHM.^ During 1913 a very few adults of this species (fig. 25) were reared from tuber-moth material collected near Puente, Cal. These speci- mens could not be reared in the laboratory. In 1914 and 1915 the parasite bec


. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 38 BULLETIN 427, U. S. DEPAKTMENT OF AGEICULTURE. 1915. February 23.—1 Sympiesis stigmatipennis adult issued. (Female.) February 25.—3 Sympiesis stigmatipennis adults issued. (Males.) Life cycle 26 days at average mean temperature of about 52° F. Longest life cycle noted, 45 days. CAMPOPLEX PHTHORIMAEAE CUSHM.^ During 1913 a very few adults of this species (fig. 25) were reared from tuber-moth material collected near Puente, Cal. These speci- mens could not be reared in the laboratory. In 1914 and 1915 the parasite became very abundant, and was reared from tuber-moth, larvse, proving it to be a parasite of this Fig. 25.— Campoplex phthorimaeae; Adult female, with lateral view of abdomen. (Original.) Much enlarged. Tests under laboratory conditions showed that it oviposits in the tuber-moth larvae only where they act as leaf-miners, and prefers those about half grown. The adult has been noted ovipositing both in the field and in the laboratory. It is so active that the tuber-moth 1 Chittenden Nos. 2230»3 and 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 Dept. : Supt. of Docs. , G. P. O.


Size: 1501px × 1664px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture