CrystalPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

Avoid spraying within 6 metres of the field boundary to reduce effects on non-target insects or other arthropods.

 

Other Restrictions/Warnings Wash down machinery immediately after use, using a proprietary spray tank cleaner.

 

 Susceptibility of weeds to single applications of Crystal.

Weeds controlled both pre-emergence and post-emergence up to the size specified

 

Weed:Annual Meadow Grass

Rate:2 l/ha

Critical Comments:S (up to 2 lvs)

 

WRAG Guidelines advise that application to small Black-grass aids in control of resistant Black-grass. However, application of ‘Crystal’ to small Black-grass will not improve control of resistant populations that can metabolise a range of herbicides, as both flufenacet and pendimethalin can be affected. The efficacy of both flufenacet and pendimethalin can be reduced by the enhanced metabolism resistance mechanism of Black-grass; this can happen even when treating black-grass at the early growth stages recommended for treatment with Crystal.

Strains of some annual grasses (eg Blackgrass, Wild-Oats, and Italian Ryegrass) have developed resistance to herbicides, which may lead to poor control. A strategy for preventing and managing such resistance should be adopted. Guidelines have been produced by the Weed Resistance Action Group and copies are available from the HGCA, CPA, your distributor, crop adviser or product manufacturer.

Populations of black-grass and Italian ryegrass with high levels of enhanced metabolism resistance will not be fully controlled.

Key elements of the resistance management strategy for Crystal: - Always follow WRAG guidelines for preventing and managing herbicide resistant weeds. - Maximise the use of cultural control measures wherever possible (e.g. crop rotation, ploughing, stale seedbeds, delayed drilling, etc). - Use tank mixes or sequences of effective herbicides with different modes of action within individual crops, or successive crops. - For the control of herbicide resistant grassweeds, always use Crystal in tank mix or sequence with other effective graminicides with different modes of action. - Apply pre-emergence of weeds wherever possible. If applications are delayed, apply post-emergence products/mixtures to small, actively growing weeds, especially where high levels of resistance are suspected and to reduce the risk of resistance development. - Monitor fields regularly and investigate the reasons for any poor control.

 

Crystal can be used on all varieties of Winter Wheat and Winter Barley

Time of application:From pre-emergence to before third tiller stage (GS 23) of the crop and before 31 December in year of planting

Rate of application: Apply Crystal at 2 or 4 l/ha in 200 litres of water/ha.

 

There are no restrictions on following crops when Crystal is used alone. Plough to at least 15 cm before planting all following crops except for potatoes, peas, wheat and barley.

Plough to at least 15 cm.The following crops may then be sown: potatoes, peas, wheat and barley.

 

Mixing and Application