Inappetency and latent effects of viriinfected larvae of Palpita unionalis (HB.) [Lepidoptera, Pyraustidae] [electronic resource].

Includes references.

The 2nd instar larvae of Palpita unionalis fed (under laboratory conditions of 26 ± 1 C and 65 ± 3% R.H.) for 48 hrs. on newly vegetative olive leaves treated by dipping with different concentrations of aqueous extract of larvae of the same species infected with nuclear polyhedrosis viruses that were collected from laboratory mass-culture. The treated larvae high significantly consumed lower food than that concerning untreated ones during the periods of larval duration recording daily average of food consumption of 38.06, 42.75, 38.34, 35.11 and 45.30 mg/larva for the tested concentrations of 0.01, 0.005, 0.0025, 0.00125 and 0.00063 compared with 89.51 mgllarva for untreated larvae. Also, the daily averages of resulted faeces, utilized food and approximate digestibility high significantly varied according to the treatments. The biological aspects of larvae, pupae and emerged adults were influenced with treatments; where duration periods of both larvae and pupae of treated individuals prolonged; but mean weight of pupa and sex ratio as % emerged males reduced slightly, while % pupation, % emergence and longevity of both males and females reduced sharply comparing with that recorded for untreated ones.

Summary in Arabic.

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