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(invertebrate zoology)
A fatal bacterial disease of caterpillars, especially silkworms, marked by loss of appetite, dysentery, and flaccidity of the body; after death the body darkens and liquefies.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(also called wilt disease), a viral disease of mulberry leaf-feeding and oak leaf-feeding silkworms. The secondary causative agents of flacherie are such bacteria as Bacillus cereus. Infection occurs through the feed. The causative agents are disseminated by flies, as well as by neglect of proper hygienic measures in caring for the silkworms. The disease is highly infectious, with a high rate of mortality. The excrement of infected caterpillars is foul-smelling and liquid; their bodies darken and become flaccid, and death occurs in two or three days.

Treatment consists in dusting the feed with antibiotics. Flacherie is prevented by disinfecting the silkworm ova with a 2–3-percent solution of Formalin and by disinfecting with a hot alkaline solution the places where the caterpillars are reared and the implements used in their care.


Afrikian, E. K. Entomopatogennye bakterii i ikh znachenie. Yerevan, 1973.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.