CONVISO^® ONE – the innovative herbicide

CONVISO^® ONE is a post-emergence herbicide that can be used in a split or single application. The annual dose rate is limited to 1 l/ha.

Lower dose rates should be avoided to reduce the risk of selecting for resistant weeds.

CONVISO^® ONE can also be used in tank mixture or in a sequence with other herbicides in specific weed (e.g. tall weeds) or weather (e.g. long lasting drought) situations.

Classic varieties are fully sensitive to ALS-inhibitor herbicides and would be damaged by CONVISO^® ONE.

Dose rate

The dose rate is limited to 1.0 l/ha per year. A split application with twice 0.5 l/ha is recommended. The minimum interval between applications is 10 days. The second treatment needs to be applied when new emerging weeds reach the two true leaf stage again.
A single application is also possible. In this case 1.0 l/ha is applied as single dose.

Before filling CONVISO^® ONE in the sprayer tank shake the can well 2 – 3 times.

Mixtures and Sequences

CONVISO^® ONE can be combined with classic herbicides or additives registered for sugarbeet production.

Spray timing

CONVISO^® ONE is registered to be used from cotyledon stage until 8 leaf stage of sugarbeet. But the decision on when to apply the herbicide is determined by the growth stage of the weeds.

The guiding weed is Fat hen (Chenopodium album). Once the first fat hens reach the stadium of two true leaves (BBCH 12) the first spray in a split application regime must be applied. In case there is no fat hen in the fields, choose another weed and look for the first individuals showing two true leaves.

Speed of action

Herbicides belonging to the group of ALS inhibitors act slower than the classical herbicides currently used in sugarbeets. After the application of CONVISO^® ONE weeds stop growing (1-3 days) followed by yellowing (chlorosis) which then turns into a reddish tone (4-10 days). Finally plants show a progressive browning (necrosis) and will die (7-20 days).

Innovative herbicide

Fat hen (Chenopodium album) - The indicator weed for CONVISO^® ONE

The decision on when to apply CONVISO^® ONE is determined by the growth stage of the indicator weed Fat hen (EPPO-code: CHEAL). In case there is no fat hen in the fields, choose another guiding weed and look for the individuals with two true leaves.

Standard recommendation for split applications:

First application: latest when the first CHEAL plants in the field reach the 2 true leaf stage (2 cotyledon & the first pair of true leaves)
Second application follows minimum 10 days later when the first new emerging weeds reach the two true leaf stage.
Adapt the interval always to local conditions.
Especially under dry conditions the spray interval might be longer in case of missing weed emergence and full control of treated weeds