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Journal article
Contact and fumigant toxicity of five pesticidal plants against Callosobruchus maculatus (Coleoptera: Chrysomelidae) in stored cowpea (Vigna unguiculata).
Insecticidal activities of five pesticidal plant species, , (Syn: ) , , and , which have been reported to control storage pests, were evaluated as leaf powders against (Fabricius 1775) in stored cowpea. Their efficacy was compared with the commercial pesticide Actellic dust (pirimiphos-methyl) at the recommended concentration (50 g/90... -
Journal article
Plant toxin levels in nectar vary spatially across native and introduced populations.
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Journal article
For antagonists and mutualists: the paradox of insect toxic secondary metabolites in nectar and pollen
The plant kingdom produces an extraordinary diversity of secondary metabolites and the majority of the literature supports a defensive ecological role for them, particularly against invertebrate herbivores (antagonists). Plants also produce secondary compounds in floral nectar and pollen and these are often similar to those produced for defense against invertebrates...Stevenson, Philip C.
Bombus, Bee pathogens, Nicotine, Caffeine, Pollinator specialization, Nectar chemicals, and Crithidia bombi
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Journal article
Rosmarinic acid in Canna generalis activates the medial deterrent chemosensory neurone and deters feeding in the tobacco hornworm Manduca sexta
For all but a very few highly specialized insect feeders, Canna generalis L. (Cannaceae) is unacceptable as a food plant and is a highly potent feeding deterrent for the tobacco hornworm Manduca sexta Johan. (Lepidoptera). The present study describes the isolation of an active deterrent compound, rosmarinic acid (RA) from...Simmonds, Monique S.J. ; Stevenson, Philip C. ; Hanson, Frank E.
sensory coding, feeding behaviour, phagodeterrents, phytochemistry, Lepidoptera, and insect neurophysiology
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Journal article
Flagellum Removal by a Nectar Metabolite Inhibits Infectivity of a Bumblebee Parasite
Plant phytochemicals can act as natural ‘‘medicines’’ for animals against parasites [1–3]. Some nectar metabolites, for example, reduce parasite infections in bees [4–7]. Declining plant diversity through anthropogenic landscape change [8–11] could reduce the availability of medicinal nectar plants for pollinators, exacerbating their decline [12]. Existing studies are, however, limited...