IMPACT OF YELLOW STEM BORER, SCIRPOPHAGA INCERTULAS (WALKER) DAMAGE ON SEQUENTIALLY PLANTED RICE CROPPING SYSTEMS

R.P. SOUNDARARAJAN¹*, P. JEYAPRAKASH^2
1Horticultural College and Research Institute, Navalur Kuttapattu, Trichy, 620027, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Anbil Dharmalingam Agricultural College and Research Institute, Navalurkottapattu, 620009, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : sound_insect73@rediffmail.com

Received : 27-06-2019     Accepted : 12-07-2019     Published : 15-07-2019
Volume : 11     Issue : 13       Pages : 8721 - 8724
Int J Agr Sci 11.13 (2019):8721-8724

Keywords : Rice, Yellow stem borer, Scirpophaga incertulas, Monthly planting, Dead heart damage, Correlation, Weather parameters
Academic Editor : Dr N. Chitra
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Horticultural College and Research Institute, Navalur Kuttapattu, Trichy, 620027, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

Investigations were carried out in rice field on the influence of sequential planting of rice crop on the incidence of stem borer and interaction with weather parameters. Monthly planting of two susceptible rice varieties viz., Pusa basmati-1 and TN-1 was taken out in Paddy Breeding Station, Tamil Nadu Agricultural University, India during the period January 2015 to December 2015. The results revealed at 30 days after planting (DAP) more dead heart damage was observed in January (15.80%) and February (10.08%) planted crops of Pusa basmati-1. Maximum dead heart damage was noticed in 45 days after planting (DAP) with 24.00 percent dead heart in the January planted crop. The stem borer damage declined in the middle of the year and again the incidence shoot up more than 10 percent during October (10.50%), November (12.70%) and December (21.30%) months. In var. TN-1 the incidence of stem borer was comparatively lower but the temporal pattern of damage was similar to var. Pusa basmati-1. The stepwise correlation analysis of stem borer damage with weather data during the period revealed that there was significant impact of various weather parameters. The minimum temperature and minimum relative humidity had significant negative correlation with stem borer damage. Wind speed also had significant negative correlation with stem borer damage in both varieties.

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