- Direct measurement of host and parasitoid recruitment for assessment of total losses due to parasitism in a continuously breeding species, the cabbage aphid, Brevicoryne brassicae (L.) (Hemiptera: Aphididae)
- 作者: Lopez, E.R. and van Driesche, R.G
- literature id: 32649
- catalog nub: TPL_LOPEZn1989DMOHA47005900
- 文献库: Taxapad收录文献
- type: article
- publication name: Bulletin of Entomological Research
- publish date: 1989-01-01
- pages: 47-59
- volume: 79
- issue: 1
- 创建时间: 2021-03-02 15:00:32
- create by: zxmlmq (admin)
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comment:
none In studies in Massachusetts, the population density of Brevicoryne brassicae (L.) was measured over the lifespans of two groups of kale leaves from maturation to senescence. Aphid densities reached peak values of 8 multiplied by 14 and 8 multiplied by 64 aphids per leaf for the two leaf groups studies, and 65-67% of all aphids observed occurred in colonies. Host recruitments 43 multiplied by 7 and 64 multiplied by 6 aphids for two leaf groups. Parasitoid (Diaeretiella rapae ) recruitment was 6 multiplied by 8-8 multiplied by 1 and 8 multiplied by 2-15 multiplied by 8. Recruitment values indicated 15 multiplied by 6-18 multiplied by 6 parasitism for the aphid cohort on the first leaf group and 12 multiplied by 7-24 multiplied by 4% for that on the second one.
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