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Screening and Physico-Chemical Bases of Resistance in Groundnut Germplasm Lines against Thrips

Author: Shaik Moizur Rahman*, K. Vijayalakshmi and Ch V. Durga Rani

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Abstract

Thrips are major pests of peanut (Arachis hypogaea L.) worldwide, and they serve as vectors of devastating orthotospoviruses such as Tomato spotted wilt virus (TSWV) and Groundnut bud necrosis virus (GBNV). Host plant resistance is an effective eco-friendly management strategy and an important component of integrated pest management (IPM) to control damage due to thrips. Hence, screening of forty germplasm lines for thrips resistance was carried out at College Farm, College of Agriculture, Rajendranagar, PJTSAU, Hyderabad during rabi, 2019-2020. The screening experiment was laid in Randomized block design (RBD) with two replications. Twenty-five germplasm lines including the resistant check (ICGV 86031) recorded damage rating of 2 (1 to 20 per cent), while the remaining 15 lines had DR of 3 (21-30 %) against thrips. The 5 germplasm lines viz., ICGV 171015 (10.30%), ICGV 03043 (12.67%), ICGV 93468 (11.50%), ICGV 00298 (10.97%) and ICGV 02266 (12.34%) were on par with the resistant check

Keywords

Groundnut, thrips, screening, correlation, physical, biochemical.

Conclusion

Twenty-five germplasm lines including the resistant check (ICGV 86031) had a damage rating of 2 I. e 1 to 20 per cent, while the remaining 15 lines had DR of 3 (21-30%) against thrips. The 5 germplasm lines viz., ICGV 171015 (10.30%), ICGV 03043 (12.67%), ICGV 93468 (11.50%), ICGV 00298 (10.97%) and ICGV 02266 (12.34%) were on par with the resistant check (12.59%) and were significantly different from the susceptible check (23.42%). Resistance to thrips in germplasm lines was due to significantly higher trichome density on leaf lamina, higher phenol and tannin content.

References

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How to cite this article

Shaik Moizur Rahman*, K. Vijayalakshmi and Ch V. Durga Rani (2022). Screening and Physico-Chemical Bases of Resistance in Groundnut Germplasm Lines against Thrips. Biological Forum – An International Journal, 14(1): 1241-1247.