TY  - BOOK
AU  - Ghorbandi, A.W
TI  - Determination of economic threshold for Lipaphis erysimi (Kaltenbach) on Indian mustard
U1  - 633.84 G28D 
PY  - 1986///
PB  - Ludhiana
KW  - MUSTARD -- DISEASES AND PESTS
KW  - ENTOMOLOGY
KW  - ETL
KW  - LIPAPHIS ERYSIMI
KW  - MUSTARD
KW  - PLANT DISEASES
N2  - The aphid population in the untreated plots remained very low up to 9th January followed by a gradual increase reaching to peak incidents in third week of February A positive correlation between the aphid population and per cent plant-infestation indicate
ER  -