The Canadian Entomologist

Articles

SUSCEPTIBILITY OF LOW- AND HIGH-GLUCOSINOLATE OILSEED RAPES TO DAMAGE BY FLEA BEETLES, PHYLLOTRETA SPP. (COLEOPTERA: CHRYSOMELIDAE)

R. J. Lamba1

a1 Agriculture Canada Research Station, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9

The oilseed rape crop, Brassica napus L. and B. campestris L., has undergone a significant chemical transformation during the last 15 years. Plant breeders produced cultivars with only trace levels of erucic acid in the oil compared with 40-50% in early cultivars, and with 18 μmol/g of glucosinolates or less in the oil-free meal compared with 62-1 15 μmol/g (Daun 1983). The new “Canola” cultivars were developed because erucic acid was a suspected health hazard for humans and glucosinolates caused the meal to be unpalatable or toxic to farm animals.

(Received September 16 1987)

(Accepted November 09 1987)

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