S. Parameswaran ¹, P. C. Sundara Babu ¹, M. Shanthi ¹, S. Jayaraj ¹

Affiliations
1 Department of Agrl. Entomology, Tamil Nadu Agricultural University, Coimbatore - 641003, IN

Abstract

A field experiment was conducted during 1991-92 crop season at Sathiamangalam, Periyar district, Tamil Nadu, on the control of sugarcane shoot borer, Chilo infuscateiius using granulosis virus (GV) and cultural methods of control. The shoot borer infestation was significantly less in plots treated with GV and plots treated with GV+ cultural practices, than in control. Application of GV at 10⁷ inclusion bodies/ml on 35 and 50 days after planting significantly reduced the shoot borer infestation compared to other treatments. All the treatments gave increased cane yieldover control. The GV treatment alone resulted in a cost benefit ratio of 1:2.54 whereas it was 1:2047 for trash muiching, 1:2.46 for GV application and 1:2.43 for GV+ earthing up.

Keywords

Chilo infuscatellus, Control, Granulosis Virus, Cultural Practices.

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S. Parameswaran ¹, P. C. Sundara Babu ¹, P. J. Suresh ¹, S. Jayaraj ¹

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore - 641 003, IN

Abstract

The Sugarcane shoot borer, Chilo infuscatellus Snell. a key pest of sugarcane enjoys a wide distribution in the sugarcane growing areas of India (Avasthy and Tiwari, 1986) and accounts for significant loss in cane yield and sugar recovery (Patil and Hapase, 1981). A granulosis virus (GV) reported from C. infuscatellus (Easwaramoorthy and David, 1979) and was found to be highly pathogenic to C. infuscatellus in laboratory studies (Easwaramoorthy, 1984). Application of GV at 10⁹ and 10⁷ inclusion boidies (IB)/ml and carbofuran at 1 and 2 Kg a.i./ha reduced the shoot borer incidence (Easwaramoorthy and Santhalakshmi, 1988). Present studies were carried out to study the efficacy of GV in comparaison and in alternation with insecticides.

Keywords

Sugarcane Shoot Borer, Chilo infuscatellus, Control, Granulosis Virus.

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M. Mohanasundaram ¹, S. Parameswaran ¹

Affiliations
1 Departmentof Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN

Abstract

Several species of parasitic mites, namely. Leptus spp. (Erythraeidae), Iolina spp. (Iolinidae), Locustacus spp. Podopolipus spp., (Podapolipidae), Pyemotes spp. (Pyemotidae) and Tarsonemus sp. (Tarsonemidae) have been recorded on different species of grasshoppers occurring in different ecosystems in Coimbatore and their relationship discussed.

Keywords

Parasite, Mites, Grasshoppers.

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