Standardization of release rate of Trichogramma chilonis (Ishii) in bio-intensive management of Chilo partellus (Swinhoe) in fodder maize


  • Punjab Agricultural University, Department of Plant breeding and Genetics, Ludhiana, punjab, 141004, India
  • Punjab Agricultural University, Department of Entomology, Ludhiana, Punjab, 141004, India


The early season attack of Chilo partellus, in kharif sown fodder maize inflicts appreciable losses, if unchecked. Biointensive management with the use of egg parasitoid Trichogramma chilonis Ishii in fodder maize through different doses and release rate was standardized. The results of the trials from two years showed that damage parameters like Leaf Injury (LI), recorded three weeks after parasitoid release from 0.25-6.00 per cent across different treatments whereas in untreated control it was 6.50-13.25 %, respectively. Similarly the observations on percent DH patterns in different treatments varied from 0.62-3.75 % as compared to control (5.50-9.0 %). Furthermore, the per cent reduction in damage was substantially low with the second inundative release of the parasitoid than plots receiving a single release of bio-agent at a given dose. The proportion of DH recorded at three weeks after release was significantly lower (1.0 and 0.62%) in plots with t-cards @ 125,000 parasitized eggs in two releases as compared with other treatments. Additionally the green fodder yield obtained in promising treatment was statistically superior (445 q ha-1) to 392 q ha-1 GFY as recorded in the untreated control and other lower dose treatments except the plots receiving the highest dose of parasitoid release (450q ha-1). Thus the results suggested that field release of T. chilonis @ 125,000 parasitoids per hectare in two releases helps in substantial reduction of C. partellus inflicted damage with high economic returns.


Chilo partellus, deadhearts, fodder maize, Leaf injury, Trichogramma chilonis

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Farid A, Khan MIN, Khan A, Khattak SUK, Amamzeb, Sattar A. 2007. Studies on maize stem borer, Chilo partellus in Peshawar Valley. Pak J. Zool. 39(2):127–131 Aggarwal N, Jindal J. 2013. Validation of biocontrol technology for suppression of Chilo partellus (Swinhoe) on kharif maize in Punjab. J Biol Control 27(4): 278–284.

Arabjafari KH, Jalali SK. 2007. Identification and analysis of host plant resistance in leading maize genotypes against spotted stem borer, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Pak. J Biol Sci. 10: 1885– 1895. Crossref. PMid:19086556

Cheema HS, Singh B. 1991. Software Statistical Package CPCS-I. Department of Statistics. Punjab Agricultural University, Ludhiana, India.

Prasad GS, Babu KS, Subbarayudu B, Bhagwat VR, Patil JV. 2015. Identification of sweet sorghum accessions possessing multiple resistance to shoot fly (Atherigona soccata Rondani) and spotted stem borer (Chilo partellus swinhoe). Sugar Tech. 17(2): 173–180. Crossref.

Gomez KA, Agomez A. 1984. Statistical Procedures for Agricultural Research, 2nd edn. Wiley–Interscience, New York. 680 pp.

Jalali SK, Singh SP. 2006. Biological control of Chilo partellus using egg parasitoid Trichogramma chilonis and Bacillus thuringiensis. Indian J. Agri Res. 40(3): 183–189.

Pal R, Singh G, Prased CS, Ali N, Kumar A, Dhaka SS. 2009. Field evaluation of bio-pesticide and bio-agent against maize stem borer, Chilo partellus (Swinhoe) in maize. Ann Pl Prot Sci. 17: 325–327.

Pingali PI. 2001. CIMMYT. 1999-2000: World maize facts and trends, meeting world maize need, technological opportunities and priorities for the public sector. CIMMYT, Mexico. D.F: 57.

Rawat US, Pawar AD, Joshi V.1994. Impact of inundative releases of Trichogramma chilonis in control of maize stem borer, Chilo partellus (Swinhoe) in Himachal Pradesh. Pl Prot Bull. 46: 28–30.

Siddiqui KH, Marwaha KK. 1993. The vistas of maize entomology in India, Kalyani Publishers, New Delhi, India, 185 pp.

Somchaudhary AK, Dutt N. 1988. Influence of hosts and host ages on bionomics of Trichogramma perkinsi Girault and Trichogramma australicum Girault. Indian J Ent. 50: 374–379


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