TY  - BOOK
AU  - RAJWANT Singh
TI  - Estimation of losses in yield of mustard caused by the aphid Lipaphis erysimi (Kalt)
U1  - 633.849 752 R14E 
PY  - 1982///
PB  - Ludhiana
KW  - PLANT - LIFE
KW  - ENTOMOLOGY
KW  - LIPAPHIS ERYSIMI
KW  - LOSSES
KW  - MUSTARD -- DISEASES AND PESTS
KW  - YIELD LOSS
N2  - The yield in case of raya decreased as the level of aphid population increased For every unit increase (one aphid) in aphid population beyond 25 aphids per plant, the grain yield decreased by 05896 g per plot (3 x 26 m) In the case of yellow sarson. the y
ER  -