New Zealand Journal of Crop and Horticultural Science abstracts
Resistance to cabbage aphid (Brevicoryne brassicae)
in six brassica accessions in New Zealand
P. R. ELLIS*
J. A. FARRELL
New Zealand Institute for Crop & Food
Research Limited
Private Bag 4704
Christchurch, New Zealand
*Present address: Horticulture Research International, Wellesbourne, Warwick,
CV35 9EF, Great Britain.
Abstract The literature concerning the breeding of brassicas
resistant to cabbage aphid (Brevicoryne brassicae L.) and the
interaction between different cultivars and various populations of the insect
is reviewed. Six Brassica accessions selected for their different
responses to a population of Brevicoryne brassicae in England were
tested in the glasshouse against three New Zealand populations of the insect.
All six brassicas were also tested in the field at Lincoln, New Zealand. Under
caged conditions in the glasshouse accessions of Brassica fruticulosa
Cyrillo and B. spinescens Pomel were shown to have high levels of
antibiosis resistance to all three aphid populations expressed in terms of low
production of young. In the field, very few aphids settled on the plants of
these two Brassica species demonstrating high levels of antixenosis
(non-preference) resistance. The cabbage `Derby Day' and New Zealand rape
`Rangi' supported a rapid increase in aphid populations in the glasshouse and
were heavily infested in the field. A collard cultivar `Green Glaze Glossy' was
heavily infested in the field but proved to possess partial levels of
resistance in the glasshouse tests. An accession of B. insularis Moris
was non-preferred in the field and possessed a level of antibiosis resistance
similar to the collard. There was no evidence of the existence of cabbage aphid
biotypes to overcome resistance in the three populations studied.
Keywords Hemiptera; Homoptera; Aphididae; Brassica;
host plant resistance; aphid biotype
New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23:
25-29
0114-0671/95/2301-0025 $2.50/0 (c) The Royal Society of New Zealand
1995
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