Effect of Moisture Stress and Leaf Age on Bentazon Absorption in Common Cocklebur (Xanthium strumarium) and Velvetleaf (Abutilon theophrasti)

Author:

Levene Brian C.,Owen Micheal D. K.

Abstract

More than 70% of all14C-bentazon absorption occurred within 4 h after herbicide application regardless of adjuvant Moisture stress reduced14C-bentazon absorption by common cocklebur and velvetleaf. Mature (second true leaf) and moisture-stressed leaves of velvetleaf had 50 and 17 μg cm−1more epicuticular wax (ECW) than did juvenile and unstressed leaves, respectively. Common cocklebur had less14C in the ECW and lower total14C in treated mature leaves compared to juvenile leaves. The use of 28% urea ammonium nitrate (UAN) or crop oil concentrate (COC) increased14C in ECW samples of both plant species, regardless of leaf age or moisture stress. More14C in the ECW did not always correlate with more14C in the leaf tissue. Adjuvants increased14C-bentazon absorption into leaves of plants that had been stressed.

Publisher

Cambridge University Press (CUP)

Subject

Plant Science,Agronomy and Crop Science

Reference33 articles.

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2. Environmental factors affecting the retention and uptake of chormequat into cereal leaves;Hunt;Aspects Appl. Biol.,1983

3. Influence of postemergence soybean herbicides and additives on weed control and soybean injury;Hoverstad;Proc. North Cent. Weed Cont. Conf.,1985

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