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Vol. 8, Issue 6 (2019)

Assessment of biophysical and biochemical attributes conferring resistance in rice accessions/varieties to yellow stem borer, Scirpophaga incertulas Walker (Lepidoptera: Crambidae)

Author(s):
T Sharmitha, C Gailce Leo Justin, S Sheeba Joyce Roseleen and T Ramesh
Abstract:
A field trial was conducted at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirappalli District, Tamil Nadu, India for evaluating 48 rice accessions along with four varieties as check entries (TRY 1, TN 1, IWP, TRY 3) in their level of resistance to rice yellow stem borer, during Kharif 2018. Five accessions (AD 16124, AD 15101, AD 16189, AD 12182 and AD 12272) recorded nil dead heart and white ear head damage and were found to be highly resistant. Three accessions (AD 16157, AD 12132, AD 16157) were found to be highly susceptible. The number of trichomes ranged from 84.80/cm2 leaf to 90.60/cm2 leaf on upper surface and 16.40/cm2 leaf to 20.00/cm2 leaf on lower surface in the highly resistant accessions/varieties. The highly susceptible entries were found to have minimum number of trichomes ranging from 11.00/cm2 leaf to 15.60/cm2 leaf on upper surface and 1.60/cm2 leaf to 2.80/cm2 leaf on lower surface. Flag leaf angle of highly resistant accessions/varieties ranged from 1.330 to 4.330 (decreased leaf angle) and the flag leaf attitude is erect. The penultimate leaf angle of highly resistant accessions/varieties ranged from 6.330 to 8.330 (erect leaf attitude). Resistant and susceptible entries had semi-erect and horizontal leaf attitudes. Highly susceptible entries had greater leaf angle ranging from 76.000 to 84.670 (horizontal leaf attitude). The phenol content was maximum in the resistant entries ranging from 6.26 to 7.72 mg/g and minimum in the highly susceptible entries ranging from 2.53 to 3.21 mg/g. The susceptible entries had 4.40 to 5.00 egg masses/plant as against 1.00 to 1.60 egg masses /plant.
Pages: 421-426  |  365 Views  133 Downloads


The Pharma Innovation Journal
How to cite this article:
T Sharmitha, C Gailce Leo Justin, S Sheeba Joyce Roseleen, T Ramesh. Assessment of biophysical and biochemical attributes conferring resistance in rice accessions/varieties to yellow stem borer, <em>Scirpophaga incertulas </em>Walker (Lepidoptera: Crambidae). Pharma Innovation 2019;8(6):421-426.

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