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The effect of Erynia radicans on food consumption, utilization and fecundity by the spruce budworm, Choristoneura fumiferana.Author(s): Abdul K. A. Mohamed; Lucius Lewis; Denise Lewis
Source: In: Grimble, David G.; Lewis, Franklin B., coords. Proceedings, Symposium: Microbial control of spruce budworms and gypsy moths; 1984 April 10-12; Windsor Locks, CT. Gen. Tech. Rep. NE-100. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 77-81
Publication Series: General Technical Report (GTR)
Station: Northeastern Research Station
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DescriptionIn food consumption and utilization studies, observations were confined to a period of 5 days after which mortality of Erynia radicans larvae began to occur. Mortality due to the fungus was 76 and 83% in male and female larvae, respectively. In control larvae the pupation rate was over 95%. Control larvae of both sexes consumed significantly (P = 0.05) more food than fungus treated larvae on day 4 and 5. Treated as well as control larvae showed a continuous gain in body weight up to day 3, following which treated larvae of both sexes gained significantly (P = 0.05) less weight than the control. Fungus infected larvae were also less efficient in converting ingested and digested food to body substances (ECI and ECD) on day 4 and 5 in females and on day 5 in males. Pupae of both sexes from treated larvae weighed less than the control. Fecundity of adults arising from fungus treated larvae was reduced by approximately 36.4% compared with the control.
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CitationMohamed, Abdul K. A.; Lewis, Lucius; Lewis, Denise. 1985. The effect of Erynia radicans on food consumption, utilization and fecundity by the spruce budworm, Choristoneura fumiferana. In: Grimble, David G.; Lewis, Franklin B., coords. Proceedings, Symposium: Microbial control of spruce budworms and gypsy moths; 1984 April 10-12; Windsor Locks, CT. Gen. Tech. Rep. NE-100. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 77-81
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