G. Kushala, H. N. Ramesh Babu, N. Rajeshwari and A. S. Shashi Kiran
Department of Botany, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Shivmogga – 577 451 (Karnataka), India
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(Received : August 6, 2020; Accepted : October 11, 2020)
To study the seasonal incidence of potato tuber moth, Phthorimaea operculella (Zeller) in Hassan district of Karnataka, survey was undertaken during 2018-19 in kharif and rabi harvested potato crops to know the seasonal incidence of PTM, among the different talukas, which cover Hassan, Arkalgud, Holenarsipura, Channarayapatna, Arsikere, Alur and Belur talukas. Five fields were selected in each of three villages from each taluk for the study. The higher mean incidence of PTM (32%) was recorded in kharif harvested potato tubers compared to rabi harvested potato tubers (20%) at Hassan taluk followed by Holenarsipura (30% in kharif and 18% in rabi), Alur (28% in kharif and 16% in rabi), Channarayapatna (24% in kharif and 14% in rabi), Belur (22% in kharif and 12% in rabi) and Arsikere (20% in kharif and 12% in rabi). However, lowest infestation of PTM incidence was recorded in Arkalgud taluka i. e. 18% in kharif and 10% in rabi season.
Key words : : Potato tuber moth (PTM), percentage of infestation, kharif, rabi season