Department of Entomology, Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, Himachal Pradesh (India).
Infestation of pea leaf miner, Chromatomyia horticola Goureau was studied on rapeseed, Brassica campestris var. hrown sarson (BSH-I) during 1990 and 1992. In both the years, the leaf miner infestation was maximum during the 4th week of February, when the mean maximum temperatures were 15.0° and 17.7°C, mean minimum temp. 5.5° and 6.5°C, mean R.H. 65 and 44%, and total rainfall 67.8 and 2.5 mm during 1990 and 1992, respectively. Thus, green and succulent foliage combined with moderate temperature and humidity range were favourable for the infestation of this pest.
