Vol. 8, Issue 10, Part J (2024)

Investigations on incidence of citrus leaf miner, Phyllocnistis citrella infesting Nagpur mandarin were carried out in nursery at open field condition was at Centre of Excellence for Citrus (Indo-Israel Project) Bharat Nagar, Horticulture Section, College of Agriculture, Nagpur during 2024. In an experimental plot observation on 50 plants were recorded at 7 days interval and incidence of citrus leaf miner were correlated with weather parameters. The results revealed that, the incidence of leaf miner was initiated from 10^th meteorological week (MW) i.e. first week of March with 2.83 percent leaves infestation and gradually attained peak infestation at 18^th MW (22.01%) i.e. last week of April. Furthermore, the fluctuations in the incidence of citrus leaf miner were noticed and it gradually decreased from 19^th MW (18.43%) i.e. first week of May and the least incidence was observed at 24^th MW (9.92%) i.e. second week of June. The correlation co-efficient analysis results revealed that, maximum temperature (r= 0.684) showed highly significant positive correlation with citrus leaf miner at 1% significant level and minimum temperature (r= 0.582) and bright sunshine hours (r= 0.567) showed significantly positive correlation with incidence citrus leaf miner at 5% significant level.