Vol. 12, Issue 6 (2023)

Author(s):
SM Ali Humayun, Dr. Gajendra Chandrakar, Dr. Satish Kumar Verma, Roshani Pisda, Chetna Khandekar and Ashithosh Mohanan

Abstract:
The present investigation was conducted to study the status of yellow stem borer, Scirpophaga incertulas Walker infesting different type of transplanted rice cultivation system and its correlation with maximum and minimum temperature at Mahasamund district during Kharif 2020. The findings showed that, during the first week of August, the yellow stem borer dead heart infestation started with (0.67%/hill), (0.33%/hill), and (1.33%/hill), respectively, in normal transplantation (NTP), transplanting with hybrid (TPH), and system of rice intensification (SRI). The first week of September had the highest peak of dead heart infestation in all cultivation systems, with infestation rates of 7.67% per hill, (9.00% per hill), and (4.00% per hill) in NTP, TPH, and SRI, respectively. White ear head infestation was first noted in all cultivation systems during the first two weeks of October, with infestation rates of (4.33%/hill), (5.67%/hill), and (3.00%/hill) in NTP, TPH, and SRI, respectively. The maximum white ear head infestation was recorded at 1st fortnight of November with (9.67% / hill), (11.33% / hill) and (7.00%/hill) in NTP, TPH and SRI. According to correlation studies with stem borer dead heart and white ear head percent infestation, there was a non-significant positive correlation with dead heart and a non-significant negative correlation with white ear head per cent infestation in every rice cultivation system.