Assays for Insect Feeding

Lewis, Alastair C.; Emden, H. F. van

doi:10.1007/978-1-4612-4910-8_4

Cited by 48 publications

(24 citation statements)

References 116 publications

(146 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compounds tested were also more active on Colorado potato beetle adults than larvae. These results are consistent with data of earlier studies (Lewis and van Emden 1986, Hough-Goldstein 1990, Paruch et al 2000, Harmatha and Nawrot 2002. The phenomenon of higher sensitivity of adults to antifeedants may be related to the number of chemoreceptors and their discriminatory power.…”

Section: Resultssupporting

confidence: 93%

“…In the case of compounds with negligible activity, the values of total coefÞcients oscillate around zero. However, deterrents with considerable activity have total coefÞcients that exceed 100, and very good deterrents have total Based on the amount of food consumed in choice and no-choice tests, the mean percentages of leaf tissue consumption (T/C ϩ T ϫ 100) were also calculated to qualitatively compare the effectiveness of different treatments (Lewis and van Emden 1986). The deterrence coefÞcients were statistically analyzed by means of one-way analysis of variance (ANOVA).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Feeding Deterrent Activity of Terpenoid Lactones with the <I>p</I>-Menthane System Against the Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Szczepanik

Dams

Wawrzeńczyk

2005

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Feeding Deterrent Activity of Terpenoid Lactones with the <I>p</I>-Menthane System Against the Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Szczepanik

Dams

Wawrzeńczyk

2005

View full text Add to dashboard Cite

“…Thresholds for the same deterrent may vary as much as 1000 times between natural and artiÞcial substrates, resulting in differences in the effective concentrations of the chemicals presented to the insect (Schoonhoven 1982). Moreover, the same chemicals may have neutral, phagostimulant, or deterrent effects at different concentrations depending upon existing background compounds, especially phagostimulants (Lewis and van Emden 1986).…”

Section: Discussionmentioning

confidence: 99%

Resistance in Lettuce toDiabrotica balteata(Coleoptera: Chrysomelidae): The Roles of Latex and Inducible Defense

Huang¹,

McAuslane²,

Nuessly³

2003

Environ Entomol

View full text Add to dashboard Cite

“…By analogy with Abbott's (1925) formula for correcting mortality from insecticide for control mortality, the percentage antifeedant effect was calculated by the simple formula [(C 2 T)/(100 2 C)] £ 100. This estimate has the advantage over the often used 'Antifeedant (Lewis and van Emden, 1986). For example, if half as much is eaten in the treatment as in the control, the result is 50% compared with an 'Antifeedant Index' of 33.3.…”

Section: Dual-choice Testsmentioning

confidence: 94%

Antifeedant activities of crude seed extracts of tropical African spices against Spodoptera littoralis (Lepidoptera: Noctuidae)

Ntonifor

Mueller-Harvey

Emden

et al. 2006

JTI

View full text Add to dashboard Cite

The antifeedant activities of Piper guineense Schum et Thonn (Piperaceae), Aframomum melegueta (Rosk) K. Schum (Zingiberaceae), Aframomum citratum (Pareira) K. Schum (Zingiberaceae) and Afrostyrax kamerunensis Perkins and Gilg (Huaceae) seed extracts were investigated in laboratory dual-and no-choice bioassays using third-instar Spodoptera littoralis (Boisduval) larvae. In the dual-choice test, the hexane and methanol extracts of A. melegueta showed potent dose-dependent antifeedant activity at concentrations of $ 300 ppm and the water extract at $ 500 ppm, as illustrated by significantly lower leaf consumptions. Aframomum citratum methanol and water extracts exhibited antifeedant activity at $ 300 and $ 1000 ppm, respectively, but the hexane and ethanol extracts did not affect feeding at any concentration. Piper guineense ethanol and water extracts showed dose-dependent antifeedant effects at $ 300 and $ 500 ppm, respectively, and the methanol extract was active only at 1000 ppm. None of the extracts of the highly aromatic A. kamerunensis exhibited antifeedant activity at any of the tested concentrations. In the no-choice bioassays, extracts with antifeedant activity in the dualchoice tests also showed dose-dependent feeding inhibition. The hexane and methanol extracts of A. melegueta were effective in the no-choice tests at $ 100 and $ 500 ppm, respectively, and the water extract at $ 300 ppm. Similarly, the A. citratum water and methanol extracts were active at $ 500 ppm and the P. guineense water and ethanol extracts at $ 100 ppm. GC/MS chromatography of A. melegueta hexane and methanol extracts revealed volatile constituents with known anti-insect activity. The hexane and methanol extracts of A. melegueta, the methanol extract of A. citratum and the water and ethanol extracts of P. guineense may have potential for use by subsistence farmers.

show abstract

Assays for Insect Feeding

Cited by 48 publications

References 116 publications

Feeding Deterrent Activity of Terpenoid Lactones with the <I>p</I>-Menthane System Against the Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Feeding Deterrent Activity of Terpenoid Lactones with the <I>p</I>-Menthane System Against the Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Resistance in Lettuce toDiabrotica balteata(Coleoptera: Chrysomelidae): The Roles of Latex and Inducible Defense

Antifeedant activities of crude seed extracts of tropical African spices against Spodoptera littoralis (Lepidoptera: Noctuidae)

Contact Info

Product

Resources

About