Ravindra Nath Singh ¹, Shashi Shekher Sinha ¹

Affiliations
1 Central Tasar Research and Training Institute, Ranchi-835303, Bihar, IN

Abstract

The age of Eocanthecona furcellata (Wolff) eggs influenced the progeny production of Psix striaticeps (Dodd). Twenty four hour old eggs were most suitable and resulted in 19.6 per cent parasitisation and 91.83 per cent female parasitoids. Sixty hour old eggs were parasitised lest (8.4%). However, the age of the parasitoid did not affect parasitisation or progeny production.

Keywords

Eocanthecona furcellata, Host Age, Progeny Production, Psix striaticeps.

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Ravindra Nath Singh ¹, Shashi Shekhar Sinha ¹, K. Thangavelu ¹

Affiliations
1 Central Tasar Research and Training Institute, Ranchi-835 303, IN

Abstract

A life-table was constructed under laboratory conditions for a little known Scelionid egg parasitoid Psix striaticeps Dodd on Canthecona furcellata Wolff. The female parasitoid survived for 12 days and oviposited intensively for 3.5 days. The net reproductive rate (R_o) representing the total births was 38.30. The population increased with an infinitesimal rate [r_m] of 0.275 and finite rate of 1.32 per female per day. A generation was completed in 13.25 days. Life-table analysis indicated the preponderance of females due to solitary parasitism and a balanced sex ratio due to superparasitism.

Keywords

Life-Table, Psix striaticeps, Canthecona furcellata, Hymenoptera, Scelionidae.

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