Efficacy of Granulosis Virus in the Control of Shoot Borer, Chilo infuscatellus Snellen


Abstract

Field experiments were conducted during 1984-85 crop season at Vadapathimangalam, Thanjavur district, Tamil Nadu and 1985-86 crop season at Sameerwadi, Bijapur district, Karnataka to evaluate the efficacy of granulosis virus (GV) in the control of sugarcane shoot borer, Chilo Lnfuscatellus Snell. in comparison with insecticides. At Vadapathimangalam, shoot borer incidence was significantly less in plots treated with sevidol. Application of GV at 109 and 107 inclusion bodies/ml and carbofuran at 1 and 2 kg a.i./ha also reduced shoot borer incidence significantly compared to control. At Sameerwadi, gamma HCH @ 1 kg a.i./ha alone and in combination with GV reduced shoot borer incidence significantly. GV applied at different doses also brought down shoot borer incidence significantly compared to control. Data collected at harvest showed that though all the treatments recorded higher number of millable canes (NMC), cane yield and commercial cane sugar/plot (CCS/plot) compared to untreated control, the differences, however, were not significant.

Keywords

Chilo infuscatellus, Control, Granulosis Virus.

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