Journal of Biological Control

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Studies on effect of inundative releases of Trichogramma chilonis in sugarcane revealed that the frequency and rate of T. chilonis release had played a significant role in the management of sugarcane shoot borers. Early shoot borer and internode borer incidence was low in T. chilonis @ 75,000/ha/release, 6 times (6.54% and 2.27% ; 3.92% and 5.85%) followed by T. chilonis @ 50,000/ha/release, 6 times (7.9% and 4.26%) whereas untreated control recorded high incidence of early shoot borer and internode borer (10.94% and 15.95 %; 5.12% and 18.25 %) during 2015 and 2016. The sustainability of inundative releases of T. chilonis with highest per cent field recovery was recorded in T. chilonis release @75,000/ha/release, 6 times during monsoon period (68.63% and 20% ) and post monsoon period (29.55% and 37.59 %) as compared to pre monsoon period (12.1% and 9.27 %) of 2015 and 2016. Cane yields recorded in plant crop, 2015 (52.42 t/ha) and ratoon crop, 2016 (47.95 t/ha) revealed that high rate of T. chilonis @ 75,000/ha/release resulted in increased yields (21.77 % and 24.64 %) over untreated control.


Keywords

Field Recovery, Inundative Releases, Trichogramma chilonis.
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