EFFECTS OF ROOT DAMAGE BY CABBAGE MAGGOT, DELIA-RADICUM (L) (DIPTERA, ANTHOMYIIDAE), ON YIELD OF CANOLA, BRASSICA-CAMPESTRIS L UNDER LABORATORY CONDITIONS

被引:12
|
作者
MCDONALD, RS [1 ]
SEARS, MK [1 ]
机构
[1] UNIV GUELPH,DEPT ENVIRONM BIOL,GUELPH N1G 2W1,ONTARIO,CANADA
来源
CANADIAN ENTOMOLOGIST | 1991年 / 123卷 / 04期
关键词
D O I
10.4039/Ent123861-4
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The effects of root damage by larval cabbage maggots, Delia radicum (L.), on yield of canola, Brassica campestris L., were examined in laboratory experiments. Inoculations of eggs or first-instar larvae resulted in significant root damage. Damage that exceeded 50% of taproot surface area resulted in fewer racemes, fewer productive seed pods on axillary racemes, lower total biomass, and reduced yield of seed. Despite the latter effect, damage that restricts the number of flowering racemes and induces abortion of seed on axillary racemes may increase the efficiency of yield in canola, which flowers indeterminately over a short growing season.
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页码:861 / 867
页数:7
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