Gemstone

Manufacturer
BASF
Category
Fungicides
Registered until
2023-07-31
Registration number
16298
Active materials
Links
A suspo-emulsion containing 80 g/litre (7.6% w/w) pyraclostrobin plus 62.5 g/litre (6% w/w) epoxiconazole.
A protectant and systemic fungicide with curative properties for use in winter wheat, winter barley, spring wheat, spring barley, durum wheat, oats, rye and triticale.
 
DIRECTIONS FOR USE
Gemstone is a fungicide with protectant, systemic and curative properties for use in winter and spring wheat, durum wheat, winter and spring barley, oats, rye and triticale.
Yield response may be obtained in the absence of visual disease.
 
Restrictions/Warnings
Extreme care must be taken to avoid drift onto nearby crops.
Wash equipment thoroughly after use.
This product may cause damage to broad-leaved plant species.
Consult processor before use.
When applied to barley intended for malting, refer to the latest timing restrictions for epoxiconazole given by the British Beer and Pub Association.
 
Disease Control
Gemstone is a fungicide with protectant, systemic and curative properties for use in winter and spring wheat, durum wheat, winter and spring barley, oats, rye and triticale.
 
WINTER WHEAT AND SPRING WHEAT
Disease:Septoria tritici 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Septoria nodorum 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Yellow rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Brown rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Tan spot 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Fusarium ear blight #
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:GR
 
Disease:Sooty moulds (Cladosporium, Botrytis)
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:R
 
WINTER BARLEY AND SPRING BRLEY
Disease:Powdery mildew 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Yellow rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Brown rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Net blotch 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Rhynchosporium 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Ramularia 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:R
 
OATS
Disease:Powdery mildew 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Crown rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
RYE
Disease:Powdery mildew 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Yellow rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Brown rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Rhynchosporium 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
TRITICALE
Disease:Septoria tritici 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Septoria nodorum 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Yellow rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
Disease:Brown rust 
Rate:Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Critical comment:C
 
(C = Control GR = Good Reduction R = Reduction # Application of Gemstone to ears of wheat can lead to reduction of the levels of the mycotoxin deoxynivalenol (DON) associated with Fusarium ear blight infection, but this level of effect may not necessarily lead to reduction of DON below the statutory limit in wheat grain. Yield response in cereals may be obtained in the absence of visual disease.)
 
Resistance Management
GEMSTONE contains epoxiconazole, a DMI fungicide. Resistance to some DMI fungicides has been identified in Septoria leaf blotch (Mycosphaerella graminicola) which may seriously affect the performance of some products. For further advice on resistance management information in DMIs, contact your agronomist or specialist advisor and visit the Fungicide Resistance Action Group (FRAG)-UK website.
GEMSTONE contains pyraclostrobin, a member of the QoI cross resistance group. GEMSTONE should be used preventatively and should not be relied on for its curative potential.
When curative activity is needed apply QoI fungicides in mixture with a suitable dose of a curative fungicide from a different cross-resistance group. GEMSTONE meets this requirement as it contains epoxiconazole. To ensure the effectiveness of the epoxiconazole component as a partner, GEMSTONE should always be applied at the full recommended rate.
Use GEMSTONE as part of an Integrated Crop Management (ICM) strategy incorporating other methods of control, including where appropriate other fungicides with a different mode of action. You must not apply more than two foliar applications of QoI containing products to any cereal crop.
There is a significant risk of widespread resistance to QoI cross resistance group fungicides occurring. Failure to follow resistance management action may result in reduced levels of disease control.
 
Crops
Gemstone is approved for use in winter and spring wheat, durum wheat, winter and spring barley, oats, rye and triticale.
Time of Application
Apply GEMSTONE at the start of foliar disease attack. A maximum of two applications can be made before grain watery ripe in winter and spring wheat, durum wheat, rye and triticale and up to and including emergence of ear just complete in winter and spring barley and oats.
Rate of Application
Apply 2 litres GEMSTONE in 200 to 300 litres of water per hectare.
Qualified Recommendation
If required water volumes down to 100 litres per hectare may be used, however these have not been supported by effectiveness or crop safety data.
 
Following Crops
After treating a cereal crop with GEMSTONE onions, oats, sugar beet, oilseed rape, cabbages, carrots, sunflowers, barley, lettuce, ryegrass, dwarf French beans, peas, potatoes, clover, wheat, field beans and maize may be sown as the following
crop.
The effect of Gemstone on other crops has not been assessed.
 
Mixing and Spraying
Never prepare more spray solution than is required.
Half fill the spray tank with clean water and start the agitation. SHAKE THE CONTAINER WELL before use and pour in the required amount of product. Rinse any empty containers thoroughly and add rinsings to the spray tank. Add the remainder of the water and continue agitation until spraying is completed. Spray solution MUST be used on the day of mixing and must NOT be left overnight.
When tank mixes are to be used, take due note of any instructions given as to the order of mixing. Each product should be added separately to the spray tank and fully dispersed before the addition of any further product(s).
All tank mixes should be used immediately after mixing.
On emptying the container, rinse container thoroughly by using an integrated pressure rinsing device or by manually rinsing three times. Add washings to tank at time of filling and dispose of container safely.
 
 
Registered for culturesRateBBCH
Winter wheat2 l69
Winter triticale2 l69
Spring barley2 l59
Winter oats2 l59
Winter rye2 l69
Spring rye2 l69
Spring oats2 l59
Winter barley2 l59
Spring triticale2 l69
Spring wheat2 l69