Effects of 1,4-Benzoxazin-3-One Derivatives from Maize on Survival and Fecundity of Metopolophium dirhodum (Walker) on Artificial Diet |
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Authors: | Vincent Cambier Thierry Hance Edmond De Hoffmann |
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Affiliation: | (1) Unité d'Ecologie et de Biogéographie, Place Croix du Sud, 5, 1348 Louvain-la-Neuve, Belgium;(2) Unité de Spectrométrie de masse, Place Pasteur, 1, 1348 Louvain-la-Neuve, Belgium |
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Abstract: | Effects of 2- -D-glucopyranosyloxy-4-hydroxy-7-methoxy-1,4benzoxazin-3-one (DIMBOA-Glc) and DIMBOA-Glc N-O-methylated (HDMBOA-Glc), two compounds present in high concentration in maize, were tested on the aphid Metopolophium dirhodum reared on artificial diet. HDMBOA-Glc and DIMBOA-Glc decrease survival of adults with an LD50 of 1 mM and 5.6 mM, respectively, after 72 hr of feeding. These compounds also decrease the fecundity of the aphids at concentrations of 2 mM and 1 mM, respectively. At concentrations of 2 mM HDMBOA-Glc and 8 mM DIMBOA-Glc in the diet, the average lifetime fecundity of 10 females is near zero. Offspring mortality on diet with 2 mM DIMBOA-Glc is significantly higher than with the control diet. In contrast, HDMBOA-Glc has no effect on the survival of offspring. The possibility that these compounds protect Poaceae against aphids is discussed. |
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Keywords: | Poaceae maize 1,4-benzoxazin-3-ones hydroxamic acids DIMBOA aphids Metopolophium dirhodum artificial diet plant resistance |
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