Evaluation of Botanicals Insecticide against Stem Borer Scirpophaga incertulas (Walker) Leaf Folder (Cnaphalocrosis medinalis) and Green Leafhopper and in Rice

Abstract

A field experiment was conducted during the kharif season of 2020-21 and 2021-22 at Crop Research station, Masodha, Ayodhya, India to evaluate the efficacy of insecticide-botanicals against rice stem borer, green leafhopper and leaf folder. The experiment was comprising Four combination modules/treatments consisting of three insecticides Chlorantraniliprole 20% SC, Cartap hydrochloride 50% SC and Triflumezopyrim 10% SC, one commercial neem formulation - Neemazal and two plant oils - Neem and Eucalyptus oil procured were compared along with untreated control (only water spray). The lowest stem borers incidence (1 %) of in all insecticides treatment module recorded as compared to 14.8% in untreated control. Among modules, all insecticides module was found to be the best with 1.0% mean white ear damage followed by neemazal, eucalyptus oil and cartap hydrochloride module with 5.3% WE. Green leafhopper infestation was all insecticides combination was the most effective treatment showing mean population of 110.7/10 hills followed by all botanical combination (120.7) and were superior to control (158.7/10 hills). The mean leaf Folder damage (1.8%) was recorded from all insecticides module followed by treatment with neemazl (? %), Eucalyptus oil (? %), and Triflumezopyrim 10% SC (3.9% DL) when compared to untreated control (14.5% )4. Grain yield all insecticides treatment - Chlorantraniliprole, Cartap hydrochloride, Triflumezopyrim recorded the highest grain yield of 5212.0 kg/ha with 95.79% increase over control (IOC) followed by neemazal, neem oil and cartap hydrochloride with 4500 kg/ha (69.04% IOC). All the treatments were significantly superior to control plot which showed a yield of 2662 kg/ha.