TY  - BOOK
AU  - KHER, Samir
TI  - Studies on screening techniques for resistance in cultivars of some Brassica species against the mustard aphid, Lipaphis erysimi (Kaltenbach)
U1  - T 633.83 K55S 
PY  - 1989///
CY  - Ludhiana
PB  - PAU
KW  - RAPESEED -- DISEASE AND PEST RESISTANCE
KW  - ENTOMOLOGY
KW  - MUSTARD -- DISEASE AND PEST RESISTANCE
KW  - PLANT - LICE
N2  - Screen house results on optimum aphid population revealed 10 and 15 apterae per plant to be the most optimum aphid population for screening Brassica cultivars at cotyledonary and two-leaf stage, respectively. Plant density did not influence the survival p
ER  -