Environmental benefits - no need to use soil residual herbicides.

Walking the crops shows that, in general, the autumn applied residual herbicides have worked very well.

Any residual herbicides should have been applied and incorporated evenly.

Residual herbicides present a special challenge, since they may require drastic changes to the rotation.

Residual herbicides should be used to your advantage but require rotation planning and a good set of field records.

There is concern over the sensitivity of chickpea to residual herbicides in the soil.

Have similar persistence in the soil (if it is a residual herbicide)

It is one of the most residual herbicides, with studies in Sweden showing that one application can last up to 3 years.

He'd rather rely on conventional residual herbicides, and notes that some have come down in price to meet the Roundup competition.

Residual herbicides will be avoided wherever possible in an effort to maintain a good biological balance within the soil.

Create with a residual herbicide such as Propyzamide.

Avoid fields where residual herbicides from previous years persist in the soil, as crop injury may occur.

Currently, growers must rely predominantly on pre-emergent residual herbicides.

However, due to potential residual herbicide damage, fall 2,4-D is not recommended prior to oilseed or pulse crops.

This promotes rapid weed growth, and equally a rapid breakdown of residual herbicides.

Greater understanding is required of the impact of residual herbicides on the incidence of seedling disease complex.

The safest soil applied residual herbicide is oxadiazon (Foresite).

It may also be combined with certain residual herbicides to extend the period of weed control beyond that obtained with glyphosate alone.

Most annual broadleaf and grass weeds can be controlled in carrots with a soil applied pre-emergent residual herbicide.

Is a residual or non-residual herbicide required and for how long will the residual herbicide be active?

Residual herbicides are generally of lower solubility to aid soil binding but their persistency in the soil can cause other problems.

For example, the application of some residual herbicides can restrict the opportunity to plant some crops for up to 18 months after application.

Accurate records are required to know what weeds are present, to be alerted when new ones invade, and to avoid damage from soil residual herbicides.

An alternative residual herbicide is needed for control of perennial weeds such as creeping yellow cress and yellow nutsedge.

Knockdown herbicides should be used to reduce bulk of vegetative matter for easier ground preparation in preference to residual herbicides.