期刊
ARTHROPOD-PLANT INTERACTIONS
卷 8, 期 5, 页码 403-410出版社
SPRINGER
DOI: 10.1007/s11829-014-9318-z
关键词
Enemy-free space; Glandular trichomes; Indirect defense; Natural enemies; Sticky plant specialist; Tritrophic
资金
- Robert van den Bosch Scholarship for Biological Control
Glandular trichomes are conventionally viewed as a type of direct defense against herbivores that carry indirect costs associated with the exclusion of numerous predators. We tested the hypothesis that predators are ineffective on sticky plants using a predator that is adapted to sticky plants, the harpactorine assassin bug Pselliopus spinicollis Champion, and a common surrogate generalist predator in analogous studies, the coccinellid Hippodamia convergens Guerin. We tested their top-down effects on herbivores using sticky and non-sticky races of common madia plants (Asteraceae: Madia elegans) and their native herbivores, a noctuid moth (Noctuiidae: Heliothodes diminutiva Hodges) and an aphid (Aphididae: Uroleucon madia Swain). We report that both predators were effective at reducing herbivore abundances on sticky and non-sticky plants, with greater efficacy on sticky plants.
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