Ecotoxicological effects of benzoxazinone allelochemicals and their metabolites on aquatic nontarget organisms.
Before natural plant allelochemicals can be exploited as biological pesticides against weeds and for disease control, more than the effect on target organisms needs to be known. This study presents results of aquatic biotests using four organisms, namely, a water flea, a freshwater alga, a soil alga, and a luminescent bacterium. The tested substances were 10 benzoxazinone derivatives, 3 of them known to be wheat allelochemicals, benzoxazolin-2(3H)-one (BOA), 6-methoxybenzoxazolin-2(3H)-one (MBOA), and 2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3-one (DIMBOA), and 7 identified degradation intermediates and metabolites. For comparison, two commercial pesticide formulations (BAS, Betanal) were tested by applying the same set of biotests. The data set produced could be seen as an ecotoxicological evaluation for effects of allelochemicals against nontarget organisms and as a base for further risk assessment.
Department IFA-Tulln, Universität für Bodenkultur Wien, Konrad Lorenz Strasse 20, 3430 Tulln, Austria. inez.fritz@boku.ac.at
Jona Ines
JI
Fritz
Rudolf
R
Braun
D048908:Aliivibrio fischeri / Q000187:drug effects*; D000818:Animals; D048588:Benzoxazines; D001583:Benzoxazoles / Q000378:metabolism / Q000633:toxicity*; D000460:Chlorophyta / Q000187:drug effects*; D003621:Daphnia / Q000187:drug effects*; D010078:Oxazines / Q000378:metabolism / Q000633:toxicity*; D010675:Pheromones / Q000378:metabolism / Q000633:toxicity*; D014908:Triticum / Q000737:chemistry
D048588:Benzoxazines; D001583:Benzoxazoles; D010078:Oxazines; D010675:Pheromones; C017057:benzoxazolone; C031896:6-methoxybenzoxazolinone; C050733:2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one