RESISTANCE MECHANISM STUDIES IN SELECTED RICE GENOTYPES AGAINST BROWN PLANTHOPPER, NILAPARVATA LUGENS (STAL)
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Authors
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ANUSHA B
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
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Nanda Kishore
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
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SANDHYA RANI C
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
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BHUVANESWARI V
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
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SRINIVASA RAO V
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
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RAMANA RAO P V
Agricultural College, Rajamahendravaram, AP – 533 105 Acharya N G Ranga Agricultural University, Guntur,Andhra Pradesh, India
Keywords:
BPH, Honeydew, Non-Preference, Preference, ToleranceAbstract
Twelve identified rice genotypes along with susceptible check (TN 1) and resistant check
(PTB 33) were investigated for resistance against BPH during rabi 2021-22 at Regional Agricultural
Research Station, Maruteru, Andhra Pradesh. Preference/non-preference mechanism was
assessed through honeydew excretion studies and tolerance was measured through number of
days to wilt. Brown planthopper fed on these genotypes excreted significantly lower quantity of
honeydew than the susceptible TN 1 (529.33 mm2). Among the genotypes, PTB 18 and HWR-21
IR 71033-121-15-B recorded minimum honeydew excreted area of 91.00 mm2 and were equivalent
with the resistant check (78.67 mm2). The number of days taken by the genotypes to wilt ranged
from 21.33 to 34.67 days. The susceptible check TN 1 and resistant check PTB 33 took 21.33
and 34.67 days to wilt respectively. Among the genotypes, MTU 2837-31-1-1-1 took longer (32.33
days) to wilt followed by PTB 18 which took 30.33 days.
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