Effects of 1,4-benzoxazin-3-one derivatives from maize on survival and fecundity of Metopolophium dirhodum (Walker) on artificial diet.
Effects of 2-beta-D-glucopyranosyloxy-4-hydroxy-7-methoxy-1,4-benzoxazin-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 I 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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Unité d'Ecologie et de Biogéographie, Place Croix du Sud, 5, 1348, Louvain-la-Neuve, Belgium.
Hance
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De Hoffmann
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D000821:Animal Feed; D000818:Animals; D001042:Aphids / Q000254:growth & development / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D005260:Female; D005298:Fertility / Q000187:drug effects; D007928:Lethal Dose 50; D009758:Nymph / Q000254:growth & development; D010078:Oxazines / Q000737:chemistry*; D016019:Survival Analysis; D013997:Time Factors; D003313:Zea mays / Q000737:chemistry*
D010078:Oxazines