author(s)
Sathyan T, Murugesan N, Elanchezhyan K, Arokia Stephen Raj J, Ravi G

abstract
An investigation was carried out during 2014 -15 to evaluate the different botanicals, microbials and non-insecticidal materials, insecticides against leafhopper, Amrasca devastans Distant infesting cotton crop under field condition at Agricultural College and Research Institute, Killikulam, Tuticorin District, Tamil Nadu. The result of the field study revealed that, among all the botanical and non-insecticides used, teak leaf extract @ 5.0 % and neem seed kernel extract @ 5.0 % were found to be effective by reducing the leafhopper with the mean population 3.80 /3 leaves and 4.51 /3 leaves, respectively. Pink Pigmented Facultative Methylotrophic bacteria (PPFM) treatment did not enhance the population of leafhopper (5.44 /3 leaves).