Evaluation of herbicide combinations for livid amaranth (Amaranthus blitum) control in tuberous begonia (Begonia x tuberhybrida).
In the past years livid amaranth (Amaranthus blitum) is observed increasingly in begonia production fields. Control of weeds in begonia is generally done by a combined application of the soil herbicides isoxaben + simazin followed 10 days later by application of the contact herbicide bentazone. This treatment usually controls the weed population sufficiently with exception of amaranth. In 2003 a field trial was conducted to evaluate control of livid amaranth in tuberous begonia with isoxaben, simazin. S-metolachloor, phenmedipham + desmedipham and bentazone. These herbicides were used as combinations of soil treatment and contact herbicides. The results suggest that a soil treatment of isoxaben + S-metolachloor significantly reduces livid amaranth compared to isoxaben + simazin, without a pronounced negative effect on tuber yield. Application of phenmedipham + desmedipham however did not improve control of livid amaranth compared to bentazone.
Vissers
M
M
Research Centre for Ornamental Plants, Schaessestraat 18, B-9070 Destelbergen, Belgium. marc.vissers@pcsierteelt.be
van Labeke
M C
MC
D027721:Amaranthus / Q000187:drug effects* / Q000254:growth & development; D031112:Begoniaceae / Q000187:drug effects* / Q000502:physiology; D001549:Benzamides / Q000633:toxicity; D001581:Benzothiadiazines / Q000633:toxicity; D003433:Crosses, Genetic; D006540:Herbicides / Q000633:toxicity*; D012839:Simazine / Q000633:toxicity
D001549:Benzamides; D001581:Benzothiadiazines; D006540:Herbicides; C057467:isoxaben; C002003:bentazone; D012839:Simazine