Influence of light level on performance of the Colorado potato beetle on Solanum tuberosum L. and on resistance expression in S. berthaultii Hawkes

The influence of light level on the expression of resistance in Solanum berthaultii Hawkes (accessions PI 473331 and PI 473334) to the Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), was studied by exposing plants to two levels of photosynthetically active radiation: 272 +/- 37 microE...

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Published inJournal of the American Society for Horticultural Science Vol. 119; no. 5; pp. 915 - 919
Main Authors Franca, F.H. (EMBRAPA-CNP Hortalicas, Brasila DF, Brazil.), Tingey, W.M
Format Journal Article
LanguageEnglish
Published 01.09.1994
Subjects
GENETICA
GENETIQUE
GLANDE VEGETALE
GLANDULAS VEGETALES
INSECTE NUISIBLE
INSECTOS DANINOS
LARVAS
LARVE
LEPTINOTARSA DECEMLINEATA
LUMIERE
LUZ
OMBRAGE
PELOS VEGETALES
POIL VEGETAL
RESISTANCE AUX MALADIES
RESISTANCE AUX ORGANISMES NUISIBLES
RESISTENCIA A LA ENFERMEDAD
RESISTENCIA A LAS PLAGAS
SOLANUM BERTHAULTII
SOLANUM TUBEROSUM
SUPERFICIE FOLIAR
SURFACE FOLIAIRE
UMBRIA
VARIEDADES
VARIETE
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Summary:The influence of light level on the expression of resistance in Solanum berthaultii Hawkes (accessions PI 473331 and PI 473334) to the Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), was studied by exposing plants to two levels of photosynthetically active radiation: 272 +/- 37 microE/m2 per sec and 1025 +/- 150 microE/m2 per sec. Over 26 days, shading generally reduced densities of type A and B glandular trichomes, volume of trichome exudate, and phenolic oxidation activity of type A trichomes. In both light regimes, larvae reared on S. tuberosum L. were heavier, developed more rapidly, and had greater survival than those reared on S. berthaultii. Similarly, females reared on S. tuberosum were heavier and produced 10- to 20-fold more egg masses and 68 to 472 times more eggs than those reared on S. berthaultii grown at the same light level. Light level did not affect larval weight, developmental time, survival, adult weight, or fecundity of CPB on either host plant species
Bibliography:9603742
F30
H10
ISSN:0003-1062
2327-9788
DOI:10.21273/JASHS.119.5.915