Efficacy of seed treatment with diamides against fall armyworm, Spodoptera frugiperda (J.E. Smith) in early stage of the maize crop Maranabasari Shivaprasad, Deshmukh Sharanabasappa S.*, Kalleshwaraswamy C.M., Veeranna H.K., Thippeshappa G. Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, College of Agriculture, Shivamogga-577 225, Karnataka, India *Corresponding authors' E-mail : sharanabasappa@uahs.edu.in
Online published on 20 December, 2024. Abstract A study was carried out to assess the effectiveness of various insecticides as seed treatment (chlorantraniliprole 625 FS, cyantraniliprole 600 FS, thiamethoxam 30 FS, imidacloprid 600 FS, cyantraniliprole 19.8 + thiamethoxam 19.8 FS) against FAW under laboratory and field conditions. The results of the experiments revealed that chlorantraniliprole 625 FS (61.25%) and cyantraniliprole 600 FS (56.56%) caused significantly highest mean mortality against second instar larvae. The standard check cyantraniliprole 19.8 + thiamethoxam 19.8 FS also recorded mean mortality of 46.25% upto 28 DAE. Under field conditions, both the diamides (chlorantraniliprole 625 FS and cyantraniliprole 600 FS) recorded least mean number of larvae (0.62 and 0.69 larva/plant, respectively), damage rating (1.59 and 1.73 damage score/plant, respectively) and per cent plant infestation (15.32 and 17.10%, respectively) providing adequate morality up to 28 days after emergence (DAE). The insecticides thiamethoxam 30 FS and imidacloprid 600 FS seed treatments were ineffective in causing larval mortality, reducing larval load and damage rate. Top Keywords Damage rating, Mortality, Spodoptera frugiperda, Seed treatment, Zea mays. Top |