Probing Behaviour of Brown Planthopper Nilaparvata lugens (Stal.) in the Resistant Germplasm Accessions
V. Shilpakala
Krishi Vigyan Kendra, Utukur, ANGRAU, YSR Kadapa District, Andhra Pradesh - 516 003, India.
V. Jhansi Lakshmi *
ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500 030, India.
N.C. Venkatesarulu
Regional Agricultural Research Station, ANGRAU, Nandyal -518 502, India.
M. Seshu Madhav
ICAR-Central Tobacco Research Institute, Rajahmundry - 533 105, India.
R. Tamilmurugan
ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500 030, India.
R. Sarada Jayalakshmi Devi
ANGRAU, Guntur – 522034, India.
*Author to whom correspondence should be addressed.
Abstract
A total of 1110 ENRRD rice germplasm accessions were evaluated for their resistance to brown planthopper, BPH in glass house by adopting internationally accepted standard seed box screening technique and scored on 0-9 scale by following the IRRI method of standard evaluation system for rice. Among 1110 rice germplasm accessions tested, 3 were categorized as Highly resistant, 24 as resistant, 19 as moderately resistant, 192 as moderately susceptible, 509 as susceptible and rest of other 363 genotypes were highly susceptible to BPH. The studies on antixenosis mechanism of resistance for feeding by probing marks revealed that resistant entries, were least preferred by BPH nymphs and adults with more number of probing marks The results indicate that the germplasm accessions viz., IC 343457, IC 300168 and IC 377051 were highly resistant and possess non- preference mechanism of resistance and are not preferred by BPH for feeding. The identified resistant entries can be used in the breeding programmes to develop BPH resistant varieties.
Keywords: Brown planthopper, Feeding behavior, host plant resistance, germplasm accessions, Nilaparvata Lugens, probing marks, rice