Vol. 10, Special Issue 12 (2021)

Author(s):
Inakarla Paramasiva, Ummanaboina Vineetha, Chintala Sreelakshmi and Pachipala Rajasekhar

Abstract:
An experiment was conducted during kharif season of 2014-15, at Agricultural Research Station, Nellore, Andhra Pradesh to evaluate the relation between light trap catches and seasonal incidence of yellow stem borer with weather factors viz., temperature (maximum and minimum), relative humidity (morning and evening), rainfall and sunshine hours. The peak light trap catches of yellow stem borer moths during kharif season was reported at 42^nd standard week with 798 moths per week. In present study it was revealed that maximum temperature, morning relative humidity had significant positive correlation with yellow stem borer moth catches with correlation co-efficient r = 0.443 and 0.432 (P<0.01), respectively and while sunshine hours and rainfall showed significant negative correlation with yellow stem borer moth catches (r = 0.432, P<0.01 & r = 0.384, P<0.01, respectively). With regard to the field incidence, dead heart incidence was initiated from 45^th meteorological standard week (SMW) i.e second week of November on TN 1 and BPT 5204 (1.3 and 2.0 % DH, respectively) with peak incidence at 48^th standard week (67.4 and 63.2 % DH, respectively) i.e last week of November during kharif 2014.