K. Elanchezhyan1*, N. Rajinimala2, D. Lenin Raja3 and K. Harini1
1VOC Agricultural College and Research Institute, TNAU, Killikulam, Vallanadu – 628252, Thoothukudi, Tamil Nadu, India
2Rice Research Station, TNAU, Ambasamudram, Tirunelveli, Tamil Nadu, India
3Dept. of NRM, Horticultural College and Research Institute, TNAU, Periyakulam,
Theni, Tamil Nadu, India
Email: drchezhiyanphd@gmail.com
Received-22.07.2024, Revised-11.08.2024, Accepted-24.08.2024
Abstract: A study was carried out at Agricultural College and Research Institute campus and farmer’s field located at Vallanad village of Tuticorin district, Tamil Nadu, India, to analyze the seasonal incidence of blossom midge, Contarinia maculipennis Felt on jasmine, Jasminum sambac L. In the present study, the blossom midge had negative association with rainfall (-0.528*) and evening relative humidity (-0.706**). The rainfall and morning relative humidity influence the variability in damage due to blossom midge by 53 per cent (R2 = 0.528). A unit increase in rainfall decrease the damage by 0.94 per cent and a unit increase in morning relative humidity decreased the blossom midge damage by 0.44 per cent, respectively. Such information is essential in developing IPM module with ecological and economical balance.
Keywords: Seasonal incidence, blossom midge, weather factors, jasmine
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