Pest Management Science (2008) 64, 101-107

Danijela Pavlovic, Sava Vrbnicanin, Dragana Bozic and Albert J. Fischer (2008)
Morphophysiological traits and atrazine sensitivity in Chenopodium album L.
Pest Management Science 64 (2), 101-107
Abstract: BACKGROUND: A Chenopodium album L. biotype surviving in atrazine-treated Serbian corn fields (VC) was compared against atrazine-susceptible (S) and atrazine-resistant (R) standards.
RESULTS: Atrazine (2 kg ha^-1) killed S and VC shoot biomass 15 days after treatment (DAT), but R was only suppressed by 42% and survived 8 kg ha^-1. Atrazine at 2 kg ha^-1 only inhibited VC height by 60% as against 100 and 0% for S and R respectively. Chlorophyll fluorescence (Fv/Fm) and transpiration were insensitive to atrazine in R, but were inhibited by 90 and 100% in S and by 50 and 60% in VC respectively. Decline of Fv/Fm after 2 kg ha^-1 atrazine was stabilized at 3 DAT for the VC biotype.
CONCLUSION: A toxicity mitigation mechanism could have facilitated VC survival in an atrazine-treated field. Further knowledge on this mechanism is needed to establish if surviving VC plants are indicators of atrazine resistance evolution in these Serbian corn fields. Variables related to foliar function provided better detection of weed mechanisms to survive herbicide action than the usual shoot biomass measurements.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Albert J. Fischer

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Chenopodium album (weed)	Maize/corn (Zea mays)	Serbia