The flower webber Maruca vitrata (Geyer)leaf webber,
Grapholitacritica (Meyr.) are lepidopteran pests of pigeonpea, which results in
heavy crop loss by webbing leaves and floral parts. The study was conducted
using a GIS tool to assess the spatial distribution of pests and their
incidence with weather parameters (temperature and rainfall) to develop risk
assessment maps for precise pest management. It was employed to know the
spatial distribution of pests across the Kalaburagi district from 2013 to 2016.
A total of 2752 survey points were generated through the e-SAP (Electronic
Solutions against Agricultural Pests) application. From these data points,
spatio-temporal analysis was carried out using ArcGIS software to determine the
distribution of pests across space and time.
Kalaburagi district is more prone to pest attack, especially in
Chincholi, Sedam, and Kalaburagitalukas. The rainfall and maximum temperature
are the most influential factors on the population of M. vitrata. Overlay
analysis indicated that the incidence level of M. vitrata attained ETL status
in the eastern part of Kalaburagi, which recorded the highest rainfall, ranging
between 423 and 501 mm and with maximum temperature in the range of 31.11 to
32.84 °C. Whereas, in the other regions, the district with less than 403 mm
rainfall and less than 31°C recorded pest incidence at less than ETL. In the
case of leaf webber, the rainfall and maximum temperature are the most
influential factors on its population. Overlay analysis indicated that rainfall
of more than 400 mm with a one-month lag time and maximum temperature above
32°C with 10 days lag time favoured the higher incidence of pest.
Author(s) Details
A. Prabhuraj
Department of Agriculture Entomology, College of Agriculture, Raichur
University of Agricultural Sciences, Raichur, India.
R. S. Patil
Department of Agriculture Entomology, College of Agriculture, Raichur
University of Agricultural Sciences, Raichur, India.
N. L. Rajesh
Department of Soil Science and Agricultural Chemistry, College of
Agriculture, Raichur University of Agricultural Sciences, Raichur, India.
S. G. Hanchinal
Department of Agriculture Entomology, College of Agriculture, Raichur University
of Agricultural Sciences, Raichur, India.
Please see the book here :- https://doi.org/10.9734/bpi/asti/v7/7186
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