Dr. D.N. MishraABHISHEK KUMAR2024-01-212024-01-212021https://krishikosh.egranth.ac.in/handle/1/5810206455ABSTRACT Name: Abhishek kumar Id. No.: 4832/19 Semester: IV Degree : M.Sc.(Ag.) Year of Admission: 2019 Department: Entomology Major: Entomology Minor: Plant Pathology Name of Advisor: Dr. D.N. Mishra Thesis title “Management of tomato fruit borer, Helicoverpa armigera (Hub.) by using novel insecticide and botanical products” The investigation had carried out at Crop Research Centre (CRC), Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P). during Rabi 2020-21. The larvae of tomato fruit borer (Helicoverpa armigera Hub.) was first time recorded at 51st week. The observation of the population of H. armigera larvae were record at weekly interval. The larval population was low with average population of 0.35 larvae/plant. The highest larval population at 11th Standard week with 5.80 larvae/plant. The infestation per cent increased and progressively reached peak level 13.20% of 11th standard week of the year 2021. The correlation coefficient between larval population and weather parameters, the data and revealed a positive nonsignificant correlation with maximum and minimum temperatures (r= -0.340 and r= - 0.319 respectively), relative humidity in per cent (r = -0.307), rainfall (r=0.358). the data collected at 5th , 10th and 15th days after both first and second spray. The overall per cent reduction of larval population mean highest in Chlorantraniliprole 18.50% SC in 1st spray 76.01 and in 2nd spray 82.97 .The Chlorantraniliprole 18.50% SC treated plots which gave highest plot yields mean is 200.20 and maximum reduction of population. The next best insecticide in 1st spray is Flubendiamide 20% WG followed the Lambda-cyhalothrin 4.90% SC and all other treatments. All treatment was superior to untreated control. Signature Signature ( D.N.Mishra) (Abhishek kumar) Advisor AuthorEnglishThesis