Management of tomato fruit borer, Helicoverpa armigera (Hub.) by novel insecticide and botanical products
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Date
2021
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SARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, MEERUT- 250110 (U.P.),
Abstract
ABSTRACT
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 Author