Vol. 12, Special Issue 12 (2023)

Author(s):
Madhuri Sahu, Jayalaxmi Ganguli, Sunil Agrawal and RN Ganguli

Abstract:
Field experiments on Integrated Farming System, (IFS) were carried out at the Research cum Instructional Farm and Biocontrol laboratory, IGKV, Raipur, (C.G), for monitoring activity of the South American pin worm, Tuta absoluta in tomato var. Saaho. Daily catches of male moths of T. absoluta were recorded by using Wota T traps with lure and there by weekly collections were computed. Highest leaf infestation (1.60 broad mines/plant) was observed during 11^th standard meteorological week (SMW), followed by (1.40 broad mines/plant) during 12^th SMW. The average leaf infestation was 0.65 broad mines/plant. Data revealed that there was a non significant negative correlation (r = -0.420), (r= -0.248) between peak populations of T. absoluta with morning, and evening humidity respectively at 1% level of significance. The maximum temperature, minimum temperature evening relative humidity, rainfall and sunshine hour showed significant positive effect on the population build up of T. absoluta. Correlation of meteorological factors with adult Tuta absoluta population revealed that the population exhibited a highly significant positive correlation with maximum temperature and sunshine with their respective values of (r =0.649), (r =0.674) at 1% level of significant and negative but significant correlation with relative humidity (r= -0.521) However, these adults were non-significant and negatively correlated with minimum temperature, morning RH, rainfall (mm) (r =0.398) (r =0.469) (r =-0.119) at 5% level of significant respectively.