Bio-diversity of Major Insect Pests of Mango and Their Bio-rational Management
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Date
2024
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MPUAT, Udaipur
Abstract
The present investigation on “Bio-diversity of major insect pests of mango and
their bio-rational management” was carried out at Horticulture Farm, ARS, Banswara
and Department of Entomology, Rajasthan College of Agriculture, MPUAT, Udaipur
and five district of Southern Rajasthan during 2021-22 and 2022-23.
The survey result revealed that the insect pests belonging to Hemiptera order
showed maximum mean density and relative density. Shannon-Wiener index was
maximum for Coleoptera followed by Hemiptera, which indicate that the order
Coleoptera showed maximum evenness and less diversity. Simpson index was higher
for Thysanoptera, Diptera and Orthoptera, which showed that the greater the value,
the greater the diversity of insect pests of mango during both the years.
The associated natural enemies belonging to Hymenoptera order showed
maximum mean density and relative density, whereas Neuroptera and Mantodea order
showed least mean density and relative density during both the years. Shannon-
Wiener index was higher for Hymenoptera and Coleoptera, whereas minimum for
Hemiptera and Neuroptera. Simpson index was maximum for Hemiptera, which
showed that the greater the value, the greater the diversity of sample. The COXI gene
sequences of mango hopper from Rajasthan, U.P. and Maharashtra regions
demonstrated a noteworthy 99 to 100% similarity to sequences from various parts of
India.
The spray of Lambda cyhalothrin 5 EC at 0.50 ml/l gave the best results with
highest mean reduction of mango hopper population at 1st, 3rd and 7th days after spray,
while Buprofezin 25 EC at 1.25 ml/l was found superior at 14th days after spray
during both the years. The next order of effectiveness of treatment was Metarhizium
anisopliae 1.15% WP > Verticillium lecanii 1.15% WP > Beauveria bassiana 1.15%
WP > Azadirachtin 10000 PPM > Dashparni @ 50 ml/l against mango hopper during
both the years
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Citation
Yadav A.K. and Vyas A.K.