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Studies on assessment and management of insecticide resistance in rice brown planthopper, Nilaparvata lugens (Stal)

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Title Studies on assessment and management of insecticide resistance in rice brown planthopper, Nilaparvata lugens (Stal)
 
Creator MALLIKHARJUNA RAO, N
 
Contributor SATYANARAYANA REDDY, P
 
Subject management, insecticide, resistance, rice, brown, planthopper, Nilaparvata lugens
 
Description Experiments were conducted in the laboratory of the Department of
Entomology, Andhra Pradesh Rice Research Institute and Regional Agricultural
Research Station, Maruteru, during 2008-09 and 2009-10 to determine the degree of
resistance acquired by Rice brown planthopper, Nilaparvata lugens (Stal) to eight
insecticides, the occurrence of PBO and TPP suppressible metabolic resistance, the
possibility of managing resistance with selected novel insecticides and the influence of
insecticide resistance on the biology of N. lugens.
The BPH populations of the three districts viz., West Godavari, East Godavari
and Karimnagar differed in the degree of resistance acquired by them to each of the
eight test insecticides. The West Godavari strain of N. lugens was found to be 3.63 and
3.16; 3.01 and 3.07; 2.80 and 2.79; 2.22 and 2.30; 1.39 and 1.69; 1.50 and 1.36; 46.66
and 47.14; 13.11 and 12.94 folds resistant at LC50 and 2.60 and 2.52; 1.31 and 1.49;
1.10 and 1.28; 1.40 and 1.40; 1.06 and 1.50; 1.23 and 1.11; 9.4 and 14.66; 2.84 and
2.51 folds resistant at LC90 to endosulfan, monocrotophos, acephate, phosphamidon,
fenobucarb, ethofenprox, imidacloprid and thiamethoxam during 2008-09 and 2009-10,
respectively compared to susceptible strain.
The East Godavari strain of N. lugens acquired 3.53 and 3.02; 2.37 and 2.50;
2.42 and 2.36; 1.98 and 2.04; 1.41 and 1.44; 1.40 and 1.15; 28.75 and 34.76; 8.51 and
7.82 fold resistance at LC50 and 2.87 and 2.66; 1.07 and 1.31; 0.00 and 1.19; 1.35 and
1.38; 1.12 and 1.26; 1.27 and 1.02; 6.25 and 8.38; 3.73 and 4.05 fold resistance at LC90
to endosulfan, monocrotophos, acephate, phosphamidon, fenobucarb, ethofenprox,
imidacloprid and thiamethoxam during 2008-09 and 2009-10, respectively compared to
susceptible strain.
The Karimnagar strain of N. lugens showed 2.11 and 2.00; 2.34 and 2.52; 0.00
and 1.31; 1.93 and 2.12; 1.28 and 1.33; 1.10 and 1.03; 36.66 and 41.90; 12.70 and
11.41 fold resistance at LC50 and 1.26 and 1.25; 1.08 and 1.31; 0.00 and 0.00; 1.51 and
1.53; 1.06 and 1.30; 1.01 and 1.02; 8.05 and 13.38; 2.70 and 1.98 fold resistance at
LC90 to endosulfan, monocrotophos, acephate, phosphamidon, fenobucarb,
ethofenprox, imidacloprid and thiamethoxam during 2008-09 and 2009-10, respectively
compared to susceptible strain.
The synergistic effect of PBO with the test insecticides viz., endosulfan,
monocrotophos, acephate, phosphamidon, fenobucarb, ethofenprox, imidacloprid and
thiamethoxam revealed that the relatively resistant West Godavari strain of N. lugens
recorded the synergistic ratios of 10.08 and 9.66; 13.88 and 11.43; 18.82 and 13.45;
15.95 and 11.52; 2.41 and 1.55; 3.75 and 1.37; 3.2 and 6.19; 3.46 and 1.97 at LC50 and
LC90 levels, respectively during 2008-09. While, the corresponding values of
synergistic ratios during 2009-10 were 8.48 and 11.42; 19.81 and 10.91; 21.35 and
17.20; 15.69 and 9.92; 2.44 and 1.73; 3.21 and 1.88; 2.67 and 5.89; 3.48 and 1.98 at
LC50 and LC90 levels, respectively.
The synergistic effect of TPP with the test insecticides viz., endosulfan,
monocrotophos, acephate, phosphamidon, fenobucarb, ethofenprox, imidacloprid and
thiamethoxam revealed that the relatively resistant West Godavari strain of N. lugens
recorded the synergistic ratios of 6.66 and 7.41; 16.13 and 10.62; 14.22 and 11.60; 1.28
and 1.14; 1.59 and 1.33; 1.80 and 1.65; 1.09 and 1.12; 1.03 and 1.03 at LC50 and LC90
levels, respectively during 2008-09. While, the corresponding values of synergistic
ratios during 2009-10 were 6.16 and 8.61; 14.2 and 9.75; 12.49 and 12.94; 1.29 and
1.22; 1.72 and 1.51; 1.95 and 1.34; 1.08 and 1.21; 1.24 and 1.19 at LC50 and LC90
levels, respectively. The synergism with TPP was more in monocrotophos followed by
acephate, endosulfan, ethofenprox, fenobucarb, phosphamidon, imidacloprid and
thiamethoxam,
Among the novel insecticides tested, buprofezin was found to be the best
alternative insecticide for managing the resistant strain followed by pymetrozine and
imidacloprid + ethiprole and ethiprole alone.
The BPH populations of different districts recorded significantly more egg
periods compared to the susceptible population. But no significant differences were
observed in other biological parameters viz., number of progeny, total nymphal period,
adult longevity, pre oviposition period, oviposition period and total life cycle.
 
Date 2016-06-29T15:29:27Z
2016-06-29T15:29:27Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/68269
 
Language en
 
Relation D9047;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY