Abstract:
:Membrane feeding studies were conducted to determine the effects of raw juices and chemical extracts of leaves of aphid-resistant (ICV-12) and aphid-susceptible (ICV-1) cultivars of cowpea [Vigna unguiculata L. (Walp.)], on the survival, growth, and reproduction of cowpea aphidAphis craccivora Koch. Life table and demographic statistics of the cohort population and subsequent generations were estimated. Compared to ICV-1, the leaf juices and chemical extracts of ICV-12 exhibited significant (P<-0.05) adveres effects on aphid survival, growth, and reproduction. Raw leaf juice and ethyl acetate extract of ICV-12 in both water and sucrose significantly (P<-0.05) limited aphid performance. The adverse long-term effects were often more extreme than those resulting from a diet of distilled water alone. Methanol extract of ICV-12 showed an intermediate level of adverse effects on aphids, being generally less than that of ethyl acetate but greater than that of hexane. Compared to the other ICV-12 extracts, the hexane extracts in water or sucrose media did not significantly affect the aphid performance. Overall, it was determined that antibiosis was a governing modality of aphid-resistance in ICV-12. Postingestive intoxication was caused by foliage components of seedling plants of that cultivar.
journal_name
J Chem Ecoljournal_title
Journal of chemical ecologyauthors
Annan IB,Tingey WM,Schaefers GA,Saxena KNdoi
10.1007/BF02266971subject
Has Abstractpub_date
1996-07-01 00:00:00pages
1345-54issue
7eissn
0098-0331issn
1573-1561journal_volume
22pub_type
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journal_title:Journal of chemical ecology
pub_type: 杂志文章
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journal_title:Journal of chemical ecology
pub_type: 杂志文章
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journal_title:Journal of chemical ecology
pub_type: 杂志文章
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journal_title:Journal of chemical ecology
pub_type: 杂志文章
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abstract::The chemical quality of forage may determine landscape use and habitat quality for some herbivorous species. However, studies that investigate the relationship between foliar chemistry and foraging choices in wild vertebrates are rare. Petauroides volans (the greater glider) is unique among Australian marsupial folivo...
journal_title:Journal of chemical ecology
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abstract::Sex attractant pheromones are highly sensitive and selective tools for detecting and monitoring populations of insects, yet there has been only one reported case of pheromones being used to monitor protected species. Here, we report the identification and synthesis of the sex pheromone of a protected European moth spe...
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