Vol. 9, Issue 12 (2020)

Author(s):
A Gouri Harishchandra Prasad, D Anil Kumar, S Dhurua and M Suresh

Abstract:
A roving survey was conducted on the incidence of Tuta absoluta (Meyrick) in tomato growing villages of three North Coastal districts in Andhra Pradesh. The number of mines per plant, per cent infested leaves per plant and per cent fruit damage per plant were recorded, ranging from 0.46 to 5.88, 6.72 to 32.34 and 10.56 to 37.60 per cent, respectively in the three districts. The maximum mean number of mines, 4.92 and a maximum of 27.88% mean infested leaves were recorded at vegetative stage of tomato crop. At flowering stage of the crop a maximum mean number of 3.64 mines per plant and mean infested leaves of 22.11% were recorded. The highest mean number of mines, 3.48 and 21.21% infested leaves were recorded at fruiting stage of the crop. The recorded per cent fruit damage was ranging from 10.56 to a maximum of 37.60 in the crop at harvesting stage in Srikakulam district. The maximum, mean number of mines (4.18), per cent infested leaves (24.50%) and damaged fruits (33.22%) were recorded in Srikakulam district. The least was recorded in Visakhapatnam district (2.07 mean numbers of mines, mean infested leaves of 14.43% and mean damaged fruits of 17.60%).