. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. 138 KEPOET 108^ U. S. DEPARTMENT OF AGRICULTURE. Another injurious species in this country is the plum-twig gall mite, Eriophyes phloeocoptes Nalepa (also known as Ceddoptes pruni Amerling). It is an European species that has been imported into this country in recent years. The mites form small subspherical galls at the base of the buds. A cluster may surround the twig. The mites hibernate within the galls, lea\4ng them in the spring to form new ones. The galls are at first plump and smooth, but later b
. The Acarina or mites. A review of the group for the use of economic entomologists. Mites. 138 KEPOET 108^ U. S. DEPARTMENT OF AGRICULTURE. Another injurious species in this country is the plum-twig gall mite, Eriophyes phloeocoptes Nalepa (also known as Ceddoptes pruni Amerling). It is an European species that has been imported into this country in recent years. The mites form small subspherical galls at the base of the buds. A cluster may surround the twig. The mites hibernate within the galls, lea\4ng them in the spring to form new ones. The galls are at first plump and smooth, but later become dry and wrinkled and sometimes crack. Prun- ing and burning the infested twigs in winter will keep the mites in check. An application of sulphur in the spring when the mites are active will doubtless destroy many of them. The black-currant gall mite, Eriophyes ribis Nalepa, is very injurious to the currant in Eng- land. They penetrate the buds, causing them to swell, and badly infested buds die before opening. The mites breed throughout the year. They migrate in the spring when the buds are opening and may be destroyed at this time by It has been observed that. .—Round galls of an Eriophyes. (Author's illustration.). 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 Banks, Nathan, b. 1868; United States. Department of Agriculture. Washington, D. C. : G. P. O.
Size: 1444px × 1731px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1915
