TY  - BOOK
AU  - SARBJIT Singh
TI  - Studies on the biology of grain aphid sitobion avenae (Fabricius) (Aphididae : Homoptera) on wheat
U1  - T 633.119.752 S15S 
PY  - 1991///
CY  - Ludhiana
PB  - PAU
KW  - WHEAT -- DISEASES AND PESTS
KW  - ENTOMOLOGY
KW  - PLANT - LICE
KW  - SITOBION AVENAE
KW  - WHEAT
N2  - The mean length of cornicles, cauda, antennae and body was 0.41, 032, 1.62 and 2.15 mm respectively The total nymphal duration of alate and apterous forms was 110 and 10.9 days in February and 10.2 and 10.4 days in March respectively The pre-reproductive
ER  -