Association of citrus leaf miner, Phyllocnistis citrella (Lepidoptera: Gracillariidae: Phyllocnistinae) with leaf biochemical factors (Ca+2, K+ and Mg+2) in kinnow leaves of district Sargodha, Punjab, Pakistan.

Leaf samples of kinnow were taken from November 2012 to April 2013 from three different orchards (with different ages) of district Sargodha for the study of correlation of citrus leaf miner (CLM) with leaf biochemical factors (Ca, K, Mg). Damage due to CLM ranged from 32-58%. Maximum damage (58%) was observed in the month of December with a decline in percentage damage from January to March (32%) but again an increase in April. One year old orchard showed negative correlation of citrus leafminer with potassium, while two and three year old orchards showed positive correlation of CLM with potassium and calcium. In one year old and three year old orchard CLM was positively correlated with magnesium, while two year old orchard showed negative correlation of CLM with magnesium.