Vol. 10, Issue 6 (2021)

Author(s):
Nandakumar K, Vishnuvardhana, Ramegowda GK, Maruthiprasad BN, Mohankumar S and Venkatesha J

Abstract:
Investigations were carried out at college of Horticulture, Bengaluru during Kharif seasons of 2018 and 2019 involving 63 turmeric genotypes collected across Karnataka along with three check varieties (Prabha, Prathibha and Salem) planted in Augmented Block Design. Thrips and shoot borer observations gathered were analyzed using factorial design. There is no significant differences were observed among the genotypes for both insect pests indicating uniform pest incidence during two year of study. Among 63 genotypes screened for thrips revealed that, three genotypes (TC-24, TC-29 and TC-40) registered no damage during both the years of study. While the highest damage of 36.25 per cent in TC-37 was on par with TC-1, TC-42, TC-13, TC-20, TC-27, TC-38, TC-44, TC-49, TC-55, TC-58 and TC-43 (27.50, 27.50, 31.25, 32.50, 31.25, 32.00, 32.50, 31.75, 28.75, 35.00, 34.50 and 34.25 %, respectively). As many as 20 genotypes have not registered damage by shoot borer during both the years of study (TC-1, TC-2, TC-3, TC-15, TC-16, TC-19, TC-20, TC-21, TC-27, TC-28, TC-30, TC-33, TC-34, TC-39, TC-49, TC-50, TC-51, TC-56, TC-59 and TC-60).The highest damage (45.00 %) was recorded in TC-23 which was on par with TC-11 (38.75 %) followed by TC-42 (36.95 %) and TC-45 (35.48 %). From these screening studies with 63 genotypes, three genotypes were appeared to be least damaged by thrips and 27 by shoot borer. There is need to reconfirm the pest reaction under artificial condition to confirm their resistance level against target pests before exploring them in crop improvement programmes.