The effects of reduced doses and application timing of metribuzin on redroot pigweed (Amaranthus retroflexus L.) and wild mustard (Sinapis arvensis L.)


Kahramanoglu I., UYGUR F. N.

TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, cilt.34, ss.467-474, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 34 Konu: 6
  • Basım Tarihi: 2010
  • Doi Numarası: 10.3906/tar-0905-17
  • Dergi Adı: TURKISH JOURNAL OF AGRICULTURE AND FORESTRY
  • Sayfa Sayısı: ss.467-474

Özet

Minimum doses of metribuzin that provide satisfactory control (>90%) of redroot pigweed (Amaranthus retroflexus L.) and wild mustard (Sinapis arvensis L.), 2 troublesome weeds of potato crops planted in spring and autumn, respectively, were assessed. Greenhouse experiments were conducted using 100%, 80%, 60%, 40%, 20%, and 0% of the registered dose (525 g a.i. ha(-1)) of metribuzin applied to the weeds grown in plastic pots. Dry weight data from the experiments were subjected to nonlinear regression analysis and the effective doses of metribuzin that caused a 90% reduction in dry weight (ED(90)) were estimated. Metribuzin at doses of 240.8 and 293.2 g a.i. ha(-1) resulted in a 90% reduction in the dry weight of A. retroflexus when applied at the BBCH 12-15 and BBCH 16-19 growth stages, respectively. Metribuzin at doses of 183.7 and 256.2 g a.i. ha(-1) provided 90% control of S. arvensis at the BBCH 12-15 and BBCH 16-19 growth stages.