The effect of light intensity on Colorado potato beetle resistance and foliar glycoalkaloid concentration of fourSolanum chacoense clones

1991 ◽  
Vol 68 (10) ◽  
pp. 659-666 ◽  
Author(s):  
K. L. Deahl ◽  
W. W. Cantelo ◽  
S. L. Sinden ◽  
L. L. Sanford
Keyword(s):  
Light Intensity ◽  
Colorado Potato Beetle ◽  
Potato Beetle ◽  
Colorado Potato Beetle Resistance ◽  
Effect Of Light

Effect of α-Tomatine and Tomatidine on the Growth and Development of the Colorado Potato Beetle (Coleoptera: Chrysomelidae): Studies Using Synthetic Diets

2000 ◽  
Vol 35 (3) ◽  
pp. 290-300 ◽  
Author(s):  
Stanley P. Kowalski ◽  
John M. Domek ◽  
Lind L. Sanford ◽  
Kenneth L. Deahl
Keyword(s):  
Mechanism Of Action ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Growth And Development ◽  
In Planta ◽  
Prepupal Stage ◽  
Resistance Factors ◽  
Potato Beetle ◽  
Leptinotarsa Decemlineata Say ◽  
Colorado Potato Beetle Resistance

Glycoalkaloids are found throughout the genera Solanum (potato) and Lycopersicon (tomato). Certain glycoalkaloids, i.e., α-tomatine, solanocardenine, and leptine, have been implicated as resistance factors to the Colorado potato beetle, Leptinotarsa decemlineata Say. The allelochemical properties of these glycoalkaloids have primarily been demonstrated by studies in planta, correlating Colorado potato beetle resistance with high levels of foliar glycoalkaloids: solanocardenine in S. neocardenasii, α-tomatine in S. pinnatisectum, and leptine in S. chacoense. Although the evidence that these glycoalkaloids mediate resistance is compelling, controlled analyses of Colorado potato beetle response to purified glycoalkaloids, fed to insects in synthetic diets, are necessary to characterize the allelochemic nature of these compounds. In this study, Colorado potato beetle reared on a meridic, synthetic diet supplemented with increasing concentrations of α-tomatine exhibit retarded growth and delayed development. These effects were evident throughout the insects' development, from egg to prepupal stage. Tomatidine (the aglycone of α-tomatine) has no effect on Colorado potato beetle, suggesting that the tetrasaccharide moiety of the glycoalkaloid is essential for insecticidal activity, consistent with a membrane-lytic mechanism of action.

EFFET DU RAYONNEMENT LUMINEUX ET DE LA VITESSE DE L’AIR AMBIANT SUR LA TEMPÉRATURE CORPORELLE DES LARVES ET DES ADULTES DU DORYPHORE DE LA POMME DE TERRE

1997 ◽  
Vol 129 (5) ◽  
pp. 801-808
Author(s):  
Yvan Pelletier ◽  
Gilles Bélanger
Keyword(s):  
Wind Speed ◽  
Body Temperature ◽  
Light Intensity ◽  
Air Temperature ◽  
Leptinotarsa Decemlineata ◽  
The Body ◽  
Pomme De Terre ◽  
Potato Beetle ◽  
Rate Of Increase ◽  
Effect Of Light

AbstractThe effect of light intensity and wind speed on the body temperature of larvae and adults of the Colorado potato beetle (Leptinotarsa decemlineata (Say)) was studied in the laboratory. At a light intensity of 0.95 kW m−2 and without wind, the body temperature of larvae and adults was respectively 9.3 and 18.2 °C higher than air temperature. The temperature difference between the body temperature of larvae and adults and the air temperature increased linearly with an increase in light intensity. Wind speed had an important effect on the rate of increase of the body temperature as a function of light intensity in both larvae and adults. Our results demonstrated that the energy balance of larvae and adults differs.

Colorado Potato Beetle Resistance to Insecticides

2008 ◽  
Vol 85 (6) ◽  
pp. 395-413 ◽  
Author(s):  
Andrei Alyokhin ◽  
Mitchell Baker ◽  
David Mota-Sanchez ◽  
Galen Dively ◽  
Edward Grafius
Keyword(s):  
Colorado Potato Beetle ◽  
Potato Beetle ◽  
Colorado Potato Beetle Resistance

Colorado Potato Beetle Resistance in Solanum oplocense X Solanum tuberosum Intercross Hybrids and Metabolite Markers for Selection

2015 ◽  
Vol 92 (6) ◽  
pp. 684-696 ◽  
Author(s):  
Helen H. Tai ◽  
Kraig Worrall ◽  
David De Koeyer ◽  
Yvan Pelletier ◽  
George C. C. Tai ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Colorado Potato Beetle ◽  
Potato Beetle ◽  
Metabolite Markers ◽  
Colorado Potato Beetle Resistance
Sign in / Sign up

Export Citation Format

Share Document