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Journal of Entomological Research
Year : 2012, Volume : 36, Issue : 3
First page : ( 201) Last page : ( 206)
Print ISSN : 0378-9519. Online ISSN : 0974-4576.

Susceptibility of eggs, larvae and pupae of potato tuber moth, Phthorimaea operculella (Zeller) to ionizing radiation doses used for sprout inhibition in potatoes

Mahto R.*, Mandal S.K.1, Chakraborty P.

Department of Food Technology and Bio-Chemical Engineering, Jadavpur University, Kolkata -700 032, West Bangal, India

1Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Nadia -741 252, India

*Corresponding author's E-mail: rinarinku@rediffmail.com

Online published on 15 September, 2012.

Abstract

The potential of gamma irradiation to control potato tuber moth (Phthorimaea operculella Zeller) infestation on stored potatoes was studied at doses, 0.08 kGy to 0.2 kGy, that effectively induce sprout inhibition in potato without producing any undesirable textural and organoleptic changes. Hatchability of eggs was prevented at 0.2 kGy, while pupation was prevented at 0.15 kGy. Treating the eggs and larvae with 0.12 kGy and above prevented adult emergence, whereas those treated with 0.08 kGy produced deformed adults. Irradiation also affected the developmental time. Irradiation of pupae progressively increased the duration of pupal stage and percentage of deformed adults with shorter life span. None of the adults emerged from irradiated pupae laid eggs.

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Keywords

Potato, Phthorimaea operculella, Gamma-irradiation, egg, larvae, pupae, ioniznig radiation.

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