National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Studies on the biology and morphometrics of tomato pinworm, Tuta absoluta (Meyrick) were conducted at mean temperature (25±2°C) and relative humidity (75±2%) in Insectary, Department of Entomology, S.V. Agricultural College, Tirupati on tomato hybrid Sweakar-448. The development period of T. absoluta had four stages viz., egg, larva, pupa and adult. The duration of egg, first, second, third and fourth instar larvae was 4.14 + 0.35, 2.08 + 0.28, 2.75 + 0.65, 3.56 + 0.56 and 3.86 + 0.64 days, respectively. The average length and breadth of egg, first, second, third and fourth instar larvae were 0.48 + 0.05 and 0.27 + 0.07 mm, 1.51 + 0.07 and 0.19 + 0.02 mm, 2.66 + 0.04 and 0.39 + 0.12 mm, 4.22 + 0.06 and 0.64 + 0.03 mm and 7.59 + 0.09 and 1.15 + 0.04 mm, respectively. The total larval period of T. absoluta ranged from 10 to 14 days with a mean of 12.25 + 2.13 days. The pupal period lasted for 6 to 9 days with a mean of 7.81 + 0.75 days and length and breadth were 4.13 + 0.24 and 1.06 + 0.14 mm, respectively. Adult longevity on an average was 7.45 + 1.32 days in case of males whereas 14.75 + 1.16 days in case of females. The mean length and breadth of adults were 10.71 + 0.29 and 1.69 + 0.10 mm, respectively. The total development period of T. absoluta ranged from 22 to 27 days with a mean of 24.19 + 1.37 days. The fecundity of T. absoluta ranged from 143 to 218 with a mean of 170.70 + 19.60. The pre- oviposition, oviposition and post-oviposition periods of the female were ranged from 1 to 2, 4 to 8 and 2 to 4 days with a mean of 1.60 + 0.50, 6.20 + 1.51 and 2.55 + 0.60 days, respectively. The hatching per cent of T. absoluta eggs ranged from 78.10 to 91.60 with a mean of 86.15 + 3.48.
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