South American tomato leaf miner, Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) is an invasive insect pest of tomato (Lycopersicon esculentum Miller) both in field and controlled environment conditions. T. absoluta is native to South America, it was detected first time in Nepal from Kathmandu during May, 2016. Survey was conducted at 46 locations of 31 districts in terai and mid hills of Nepal during February to June 2018. T. absoluta was detected from 45 locations of 30 districts surveyed. T. absoluta which was detected from Kathmandu, Lalitpur, Bhaktapur, Kavre and Dhading districts in 2016 has now been spread into 33 districts across the Nepal. Apart from 33 districts T. absoluta might be present in other districts which were not surveyed during the study. Farmers generally manage T. absoluta through indiscriminate use of chemical pesticides. So, extensive research is needed in future to develop integrated pest management technique which is suitable and sustainable for its management in Nepalese context.
South American tomato leaf miner, (Meyrick, 1917) (Lepidoptera: Gelechiidae), is an important invasive pest of Tomato which invaded India and Nepal in 2014 and 2016, respectively. In the present study, samples from five localities of India and one from Nepal were used for the investigation of genetic diversity of by employing a fragment in the mtDNA gene-encoding cytochrome oxidase I (COI). Based on the partial COI gene, high genetic homogeneity was detected in populations of India and Nepal with rest of the world. Less nucleotide diversity ( 0.00137) was also detected in the populations of from different countries. This is first attempt to analyze molecular data for this new invasive species from India and Nepal.
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