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Ecotoxicol Environ Saf

Title:		Dual action of phosphonate herbicides in plants affected by herbivore--model study on black bean aphid Aphis fabae rearing on broad bean Vicia faba plants
Author(s):		Lipok J;
Address:		"University of Opole, Oleska 48, Opole 45-052, Poland. jalip@uni.opole.pl"
Journal Title:		Ecotoxicol Environ Saf
Year:		2009
Volume:		20090417
Issue:		6
Page Number:		1701 - 1706
DOI:		10.1016/j.ecoenv.2009.03.007
ISSN/ISBN:		1090-2414 (Electronic) 0147-6513 (Linking)
Abstract:		"The interactions between plants, herbicides and herbivore insects were studied as an aspect of possible side effect of the using of phosphonate herbicides. The experimental system was composed of phosphonate herbicides, broad bean Vicia faba (L.) plants and black bean aphid Aphis fabae (Scopoli). Two means of herbicide application, namely standard spraying and direct introduction of the herbicide into stem via glass capillary, were examined. The results obtained for N-2-piridylaminomethylene bisphosphonic acid and its derivatives show 10 times higher inhibition of the plant growth if glass capillary mode was used. When plants were infested by aphids 24h after the use of herbicide, a significant decrease in plant growth rate was observed in relation to plants treated with herbicides alone. Moreover, the sensitivity of aphids towards glyphosate, N-2-piridylaminomethylene bisphosphonic acid and its 3-methyl derivative introduced to artificial diet indicated that these herbicidal phosphonates possessed also insecticidal activity if applied in a systemic manner. Additionally, olfactometer measurements revealed that aphids preferred intact V. faba leaves over those that had been treated with sublethal doses of herbicides. The results achieved in these experiments indicate that the use of phosphonate herbicides decreases plant resistance and influences the number of aphids accompanied with treated plants. Regarding these facts it can be concluded that the combined effect of herbicide-induced stress and insect herbivory reduced plant fitness and thus should be considered as also a factor enabling the reduction of herbicide doses"
Keywords:		Animals Aphids/*drug effects/growth & development Herbicides/*toxicity Host-Parasite Interactions/drug effects Organophosphonates/*toxicity Vicia faba/*drug effects/growth & development;
Notes:		"MedlineLipok, Jacek eng Netherlands 2009/04/21 Ecotoxicol Environ Saf. 2009 Sep; 72(6):1701-6. doi: 10.1016/j.ecoenv.2009.03.007. Epub 2009 Apr 17"