Evaluation of tomato genotypes against fruit borer Helicoverpa armigera Deb Sushma*, Bharpoda T. M.1 Department of Entomology, C. P. College of Agriculture S. D. Agricultural University, Sardarkrushinagar, 385506, Gujarat 1Department of Entomology, B. A. College of Agriculture Anand Agricultural University, Anand, 388110, Gujarat *Email: debsushma@gmail.com
Online published on 5 February, 2019. Abstract Tomato cultivar Anand Tomato 3 (AT 3) was found resistant to Helicoverpa armigera (Hubner) based on egg (0.26/3 twigs) and larval (0.48/3 twigs) incidence as well as fruit damage (7.07%) and also yielded higher (255.06 q/ha). Among the various morphological characters, number of branches/plant (r= 0.961**, 0.961** and 0.979**) as well as number of trichomes/cm2 on leaf (0.778**, 0.721** and 0.768**) and calyx (0.694*, 0.611* and 0.689*) showed significant positive relationships, whereas number of fruits/plant (−0.729**, -0.708* and-0.752**) showed significant negative relationship with the incidence in terms of eggs, larvae and fruit damage, respectively. Similarly, significant positive association was observed between number of trichomes/cm2 of corolla (0.594*) and fruit damage. Top Keywords Helicoverpa armigera, tomato, genotypes, incidence, egg, larva, fruit damage, resistance traits, branches, trichomes on calyx, leaf, number of fruits. Top |