- Turkish Journal of Agriculture and Forestry
- Vol: 34 Issue: 6
- The effects of reduced doses and application timing of metribuzin on redroot pigweed (Amaranthus ret...
The effects of reduced doses and application timing of metribuzin on redroot pigweed (Amaranthus retroflexus L.) and wild mustard (Sinapis arvensis L.)
Authors : Ibrahim Kahramanoğlu, F. Nezihi Uygur
Pages : 467-474
View : 13 | Download : 4
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :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 (ED90) 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.Keywords : Key words: Dose-response curve, metribuzin, minimum dose, satisfactory control efficiency, weed development stage