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Research Article
Relative Resistance among 22 Brassica napus Cultivars against Turnip Aphid, Lipaphis erysimi Kalt

Muhammad Younis Jatoi, Humayun Javed and S. A. Kakakhel

Asian Journal of Plant Sciences, 2002, 1(5), 558-559.

Abstract

The experiment on relative resistance and susceptibility among 22 cultivars of Brassica napus was laid down and it was observed that cultivars shiralee and hybrid were susceptible to turnip aphid, while the other cultivars were resistant or partially resistant to turnip aphid at leaf stage. The cultivars crusher, hybrid and shiralee were highly susceptible at flowering and the cultivars sponser, deffender, shiralee and cyclone were highly susceptible at seed formation and the oscer and cyclone were susceptible at seed maturity stage. As a whole the cultivar shiralee was highly susceptible while the cultivars hybrid, cyclone, RNB-9604D, deffender and oscer were intermediately susceptible. Similarly the cultivars sponser, CON-III, crusher, KS -75, BULLT, 19-H, dunkled and BLN-971 were partially resistant and the cultivars Yol-9, rainbow, CON-I, CON-II, CCS-01 and BLN-877 showed relative resistance among all 22 cultivars of Brassica napus against turnip aphid, Lipaphis erysimi Kalt.

ASCI-ID: 7-244

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