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Visalakshi, M.
- Field Evaluation of Entomopathogenic Fungi against White Grub, Holotrichia consanguinea Blanch in Sugarcane
Authors
1 Regional Agricultural Research Station, Anakapalle-531 001, Andhra Pradesh, IN
Source
Journal of Biological Control, Vol 29, No 2 (2015), Pagination: 103-106Abstract
Field experiments were conducted on sugarcane for white grub management using two entomopathogenic fungi i.e., Beauveria bassiana and Metarhizium anisopliae in Andhra Pradesh during 2013-14. Among the treatments imposed at the time of planting, M. anisopliae @ 5×1013 spores ha-1 mixed with farm yard manure (FYM) was found effective followed by B. bassiana @ 5×1013 spores ha-1 applied in FYM enriched field and registered 93.6 % and 88.09 % decrease in white grub damage and 77.22 % and 74.08 % decrease in white grub population. The highest cane yield was recorded when M. anisopliae @ 5x1013 spores ha-1 (81.44 t ha-1) applied with FYM followed by B. bassiana @ 5×1013 spores ha-1 (76.6 t ha-1) with FYM . Similar trend was observed by imposing treatments at one month after planting i.e., after the onset of monsoon in the month of july. M. anisopliae @ 5×1013 spores ha-1 (79.73 t ha-1) recorded highest cane yield followed by B. bassiana @ 5×1013 spores ha-1 (76.45 t ha-1) when applied with FYM at one month after planting. However, highest percent yield increase was recorded in M. anisopliae @ 5x1013 spores ha-1 (71.56 %) applied with FYM at the time of planting.Keywords
Sugarcane, Holotrichia consanguinea, Beauveria bassiana, Metarhizium anisopliae, Field Evaluation.- Effect of Inundative Releases of Trichogramma chilonis in Sugarcane
Authors
1 Regional Agricultural Research Station, Acharya NG Ranga Agricultural University, Anakapalle − 531 001, Andhra Pradesh, IN
Source
Journal of Biological Control, Vol 34, No 1 (2020), Pagination: 47-51Abstract
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.References
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