1Department of Agricultural Entomology, Agriculture College and Research Institute, Madurai-625 104, Tamil Nadu, India
2Department of Plant Pathology, Agriculture College and Research Institute, Madurai-625 104, Tamil Nadu, India
3Department of Rice, Agriculture College and Research Institute, Coimbatore-641 003, Tamil Nadu, India
4Department of Fruit Crops, Horticulture College and Research Institute, Periyakulam-625 604, Tamil Nadu, India
5Department of Plant Protection, Horticulture College and Research Institute, Periyakulam-625 604, Tamil Nadu, India
*Corresponding Author: J. Sandeep Kumar, Department of Agricultural Entomology, Agriculture College and Research Institute, Madurai-625 104, Tamil Nadu, India, Email: sndpkmr007@gmail.com
Online published on 22 October, 2020.
Tomato pinworm, Tuta absoluta is a serious and notorious pest on tomato. Control mainly relies on insecticides because of their high infestation levels on all plant parts and life stages of the crop. This study, investigated the efficacy of different insecticides, against Tuta absoluta for different populations in laboratory conditions. The LC50 ranged from 0.27 to 2.0 ppm for chlorantraniliprole, from 1.01 to 2.25 ppm for flubendiamide, from 0.32 to 0.90 ppm for spinosad, from 0.98 to 6.52 ppm for imidacloprid, from 0.82 to 6.38 ppm for indoxacarb, from 967.32 to 1911.98 ppm, for chlorpyriphos, The resistance ratios ranged from 1.1 to 7.7-fold difference in all six cases. The laboratory experimental results showed that chlorantraniliprole and spinosad were the most toxic insecticides as compared to other chemicals and showed homogenous response to them.
Baseline toxicity, Chlorantraniliprole, Chlorpyriphos, Flubendiamide, Imidacloprid, Indoxacarb, Spinosad, Tuta absoluta
