Impact of Trichogramma Release Regimes and Combination with Mass Trapping on Sugarcane Internode Borer (Chilo sacchariphagus indicus) Management
Keywords:Chilo sacchariphagus indicus, Internode Borer, Mass Trapping, Sugarcane, Trichogramma Releases.
AbstractLarge area study on the impact of six versus ten releases of the biocontrol agent, Trichogramma chilonis, besides large plot assessment of ten releases with and without mass trapping (by pheromone traps) for eco-safe management of the sugarcane internode borer (INB) - Chilo sacchariphagus indicus Kapur were undertaken in Natems Sugar factory area, Koppedu Taluk, Chittoor District, Andhra Pradesh, South India. In 2017-18, a large contiguous sugarcane crop area of 400 hectares received six releases of T. chilonis (as Tricho cards @ 5cc.ha/release) in alternate weeks during 5-7 months age of crop, followed by four additional releases during 8-9 months age (totalling ten releases) in 40 hectares area, besides assigning a no release block of 40 hectares in adjacent area. Harvest-time sampling in each treatment block showed that the INB distribution (per cent canes infested) was 80 % in control (no release) block, while it was 42 and 27 %, respectively, for six and ten releases. The INB intensity (per cent internodes infested) was also more (6.2 %) in control block whereas it was only 3.2 % and 1.5 %, in the two respective release regimes. Based on these results the cost-effectiveness of both the regimes was ascertained. In 2018-19, the impact of ten releases of T. chilonis (@5cc/hectare /release) versus same regime plus mass trapping (@25 pheromone traps/ha) was compared in large plots (each of 2.0 ha) along with an untreated control plot. Harvest-time samples showed that INB distribution was 70.3% in control block, compared to 48.3% in Trichogramma release block versus 19.8% in block combining Trichogramma and mass trapping. The respective INB intensity was 6.04 %, 4.04 % and 2.17 % while the estimated cane yields were 81.0, 86.2 and 92.5 tons/ha, respectively. The cost: benefit ratios for Trichogramma release with and without mass trapping were comparable, so confirming that both are cost-effective alternatives to chemical insecticide use in sugarcane agro-ecosystems.
Bhavani B, Visalakshi M, Bharathalakshmi M. Veerabhadra Rao K. 2016. Integrated management of sugarcane borer complex through mass trapping with pheromone lures and biological controls. STC Agric Nat Resour. 2(6):13–17.
Geetha N, Shekinah, ED, Rakkiyappan P. 2009. Comparative impact of release frequency of Trichogramma chilonis Ishii against Chilo sacchariphagus indicus (Kapur) in sugarcane. J Biol Control 23(4): 343–351.
Gomez KA, Gomez AA. 1983. Statistical procedures for agricultural research. John Wiley & sons, NewYork, USA. 680pp.
Hari Chand, Ranju Kumari, Minnatulah MD, Sudhir Paswan. 2018. Management of borers complex through pheromone traps in sugarcane agro-ecosystem of Bihar. Int J Curr Microbiol App Sci. 7: 158–167.
Sithanantham, S, Geetha, N, Baitha A, Jalali S K. 2013. Utility of Trichogramma for biocontrol of sugarcane borers. pp-271-300. In: Sithanantham S, Chandish R Ballal, Jalali SK, Bhaktavatsalam N (Eds.). Biological control of Insects pests using egg parasitoids. Springer Publishers London. https://doi.org/10.1007/978-81322-1181-5_12
Sithanantham S, Kandasamy R, Prabakaran M, Judy S, Manikandan KR. 2015. Multifaceted factory-level R&D model to locally maximize the economic benefit of ecofriendly sugarcane borer management methods. SISSTA Sugar J. 45:37–49.
Sithanantham S, Judy S, Thamaraichelvi C, Prabakaran M. 2017. Time-saving sampling methodology for harvest stage assessment of crop age-wise internode borer infestation at sugar factory-level. SISSTA Sugar J. 47: 196–206.
Sithanantham S, Prabakaran M, Bhavani B, Jhansi K, Vijayaprasd P, Babu V, Punnarao VV, Kannanraja N. 2019. Multi-location test of alternative pheromone trap designs for water basin traps for early shoot borer in south India. Sugar Tech. 22(1): 98–104. https://doi.org/10.1007/s12355-019-00744-7