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Pathogenicity of normuraea rileyi and its effect on food consumption and utilization by heliothis virescens larvae



Pathogenicity of normuraea rileyi and its effect on food consumption and utilization by heliothis virescens larvae



Journal of the Georgia Entomological Society 17(3): 377-382



Instars 2-5 of H. virescens (F.) larvae were equally susceptible to N. rileyi (Farlow) Sampson conidia. The highest mortality was 77% among the 5th instar larvae. The consumption of cotton squares by untreated larvae for days and 6 was significantly lower (P = 0.05) than larvae infected with N. rileyi. There was no significant difference in the approximate digestibility (AD) of the treated and untreated larvae. The efficiency of conversion of ingested and digested food to body substance was significantly higher (P = 0.05) in the control than the N. rileyi treated larvae for days 4-6.

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Accession: 006071471

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