Seasonal abundance of Phyllocnistis citrella Stainton (citrus leaf miner) was studied
fortnightly in two sweet orange plots cv. Jaffa and Mosambi in Jammu from March, 2005 to February,
2008. Three population peaks were observed, irst in April (spring lush), small second peak in July
and third peak in September (autumn lush). The peaks so obtained coincided with the availability of
new lush. Correlation analysis indicated that the percentage infestation was correlated signiicantly
with maximum temperature and minimum temperature. Average rainfall showed a positive correlation
with the population, but not average relative humidity. Populations of citrus leaf miners were also
studied fortnightly on six different citrus cultivars, viz. grapefruit: Chakotra, lemon Eureka and Galgal
(Citrus pseudolimon), limes: Sweet lime, Seedless lime and mandarin (Kinnow) from March, 2006 to
February, 2007. Signiicant differences in the incidence of leaf miner were observed between different
species of Citrus.