SignumPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

A water dispersible granule containing 26.7% w/w boscalid and 6.7% w/w pyraclostrobin.

Signum is a fungicide with protectant and systemic activity for use against certain diseases in broccoli, Brussels sprout, cabbage, calabrese, cauliflower, strawberry (outdoor and protected), carrot, lettuce (outdoor and protected), field beans, combining peas, vining peas and blackcurrants.

 

All instructions within this section must be read carefully in order to obtain safe and successful use of this product.

 

Processed Crops – Consult processors before use on crops destined for processing. Tests have indicated that no taints were detected in blackcurrant juice; quick frozen or canned vining peas and canned combining peas.

Applications to lettuce must only be made between 1 April and 31 October.

DO NOT APPLY MORE THAN 6 kg/ha of Signum to the same area of land per annum.

 

Signum is a fungicide with protectant and systemic activity for the control of a range of diseases in broccoli, Brussels sprout, cabbage, calabrese, cauliflower, strawberry (outdoor and protected), carrot, lettuce (outdoor and protected), field beans, combining peas, vining peas and blackcurrants, as summarised below:

Disease:American gooseberry mildew Sphaerotheca morsuvae

Rate:Apply 1.5 kg of Signum in a water volume of 200 − 1000 litres of water per hectare, ensuring good coverage of the foliage and fruit.

Critical Comments: MC(Moderate control)

 

Disease:Blackcurrant leaf spot Drapenopeziza ribis

Rate:Apply 1.5 kg of Signum in a water volume of 200 − 1000 litres of water per hectare, ensuring good coverage of the foliage and fruit

Critical Comments: MC(Moderate control)

Disease:Grey mould - Botrytis cinerea

Rate:Apply 1.5 kg of Signum in a water volume of 200 − 1000 litres of water per hectare, ensuring good coverage of the foliage and fruit

Critical Comments: C(control)

 

For control of grey mould (Botrytis cinerea), apply Signum as a protectant spray from the start of flowering.

For moderate control of American gooseberry mildew and blackcurrant leaf spot, apply Signum as a protectant spray before the appearance of disease symptoms.

Applications should be made in sequence with other products as part of a disease control programme, in which case the interval between use of Signum and subsequent fungicide treatment should be between 10−14 days, depending on disease pressure. Two applications of Signum can be made but a minimum of 3 days must elapse between the application of Signum and harvest.

Signum may be used as post-harvest treatment to help protect against American gooseberry mildew and blackcurrant leaf spot infections, thus reducing the possibility of infection-induced premature leaf drop and reduced bush vigour, which may adversely affect crop yield in the subsequent year. Apply Signum as a protectant spray after blackcurrants have been harvested and before leaf senesence.

 

Disease:White blister - Albugo candida

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: C(control)

Disease:Ringspot Mycosphaerella brassicola

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: UC(Useful level of control)

Apply Signum as a protectant spray or at the first sign of disease. Repeat sprays at 3–4 week intervals depending on disease pressure. Three applications can be made but a minimum of 14 days must elapse between the last spray and harvest.

 

Disease:White blister - Albugo candida

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: C(control)

Disease:Dark leaf spot Alternaria spp

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: C(control)

Disease:Ringspot Mycosphaerella brassicola

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: UC(Useful level of control)

Apply Signum as a protectant spray or at the first sign of disease. Repeat sprays at 3–4 week intervals depending on disease pressure. Three applications can be made but a minimum of 14 days must elapse between the last spray and harvest.

 

Disease:Dark leaf spot Alternaria spp

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: C(control)

Disease:Ringspot Mycosphaerella brassicola

Rate:Apply 1.0 kg/ha of Signum in a minimum of 200 litres of water per hectare. In dense crops, increase the water volume up to a maximum of 1000 litres of water per hectare to achieve adequate penetration and good coverage of the crop

Critical Comments: UC(Useful level of control)

 

Disease:Grey mould - Botrytis cinerea

Rate:Apply 1.8 kg of Signum in a water volume of 450-2000 litres of water per hectare, ensuring good coverage of the foliage and fruitlets.

Critical Comments: C(control)

Disease:Powdery mildew Erisiphe heraclei Sphaerotheca macularis

Rate:Apply 1.8 kg of Signum in a water volume of 450-2000 litres of water per hectare, ensuring good coverage of the foliage and fruitlets.

Critical Comments: C(control)

Disease:Blackspot Colletotrichum acutatum

Rate:Apply 1.8 kg of Signum in a water volume of 450-2000 litres of water per hectare, ensuring good coverage of the foliage and fruitlets.

Critical Comments: C(control)

 

For optimum control of grey mould, apply Signum as a protectant spray from the beginning of bloom (white bud). For the control of powdery mildew and blackspot, apply Signum as a protectant spray before the appearance of disease symptoms. Applications should be made in sequence with other products as part of a fungicide spray programme applied during flowering at 7-10 day intervals. Two applications can be made but a minimum of 3 days must elapse between the last spray and harvest.

Signum may be applied at 1.8 kg per hectare in 400 litres water per hectare although efficacy at this reduced volume has not been evaluated. Therefore application at 400 litres water per hectare is at user‘s risk with regard to biological efficacy 

 

Disease:Powdery mildew Erisiphe heraclei Sphaerotheca macularis

Rate: 0.75–1.0 kg/ha 

Critical Comments: C(control)

Disease:Alternaria leaf blight Alternaria dauc

Rate:0.75–1.0 kg/ha 

Critical Comments: MC(Moderate control)

Disease:Sclerotinia rot Sclerotinia sclerotiorum

Rate:0.75–1.0 kg/ha 

Critical Comments: MC(Moderate control)

For control of powdery mildew and moderate control of alternaria leaf blight, apply 0.75 kg/ha of Signum in a water volume of 200–900 litres of water per hectare, ensuring good coverage of the foliage. For moderate control of sclerotinia rot, increase dose rate to 1.0 kg/ha of Signum in a water volume of 200 – 900 litres of water per hectare, ensuring good coverage of the foliage.

Apply Signum as a protectant spray or at the first sign of disease. Repeat sprays at 7–14 day intervals depending on disease pressure. Two applications can be made but a minimum of 14 days must elapse between the last spray and harvest.

 

Disease:Grey mould - Botrytis cinerea

Rate:Apply 1.5 kg of Signum in a water volume of 200-900 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: C(control)

Disease:Bottom rot Rhizoctonia solani

Rate:Apply 1.5 kg of Signum in a water volume of 200-900 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: C(control)

Disease:Watery soft rot - Sclerotinia spp

Rate:Apply 1.5 kg of Signum in a water volume of 200-900 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: C(control)

Apply Signum as a protectant spray from 1-2 weeks after planting. Apply sprays at 10–14 day intervals depending on disease pressure. Two applications can be made but a minimum of 14 days must elapse between the last spray and harvest.

 

Disease:Bean rust - Uromyces fabae

Rate:Apply 1.0 kg/ha of Signum in a minimum volume of 200 – 300 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: C(control)

Disease:Chocolate spot - Botrytis spp.

Rate:Apply 1.0 kg/ha of Signum in a minimum volume of 200 – 300 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: MC(Moderate control)

Apply Signum as a protectant spray or at the first sign of disease. For optimum control of bean rust and moderate control of chocolate spot, apply sprays from early flower and repeat at a 3 – 4 week interval, depending on disease pressure. Two applications can be made but a minimum of 21 days must elapse between the last spray and harvest.

 

Disease:Leaf and pod spot Ascochyta pisi

Rate:Apply 1.0 kg/ha of Signum in a minimum volume of 200 – 400 litres of water per hectare, ensuring good coverage of the foliage.

Critical Comments: MC (Moderate control)

 Vining peas

For moderate control of leaf and pod spot (Ascochyta pisi), apply Signum as a protectant spray or at the first sign of disease. One application can be made and a minimum of 14 days must elapse between application and harvest. To maintain disease control a subsequent treatment with another product may be required 2 – 3 weeks later depending on disease pressure.

 Combining peas

Apply Signum as a protectant spray or at the first sign of disease. For moderate control of leaf and pod spot (Ascochyta pisi), apply sprays from early flower and repeat at a 2 – 3 week interval, depending on disease pressure. Two applications can be made but a minimum of 21 days must elapse between the last spray and harvest.

 

In order to minimise risk of resistance:

Signum contains the QoI fungicide, pyraclostrobin and the SDHI (carboxamide) fungicide, boscalid. Signum should be used in accordance with FRAC resistance management advice for QoI and carboxamide mixtures.

Avoid using consecutive applications of Signum. Apply Signum in alternation with fungicides from a different cross-resistance group with satisfactory efficacy against the targeted diseases.

In line with FRAC guidance, the number of Signum applications should be no more than half of the total number of fungicide applications per season. Use no more than a maximum of three applications of Signum per crop in brassicas; no more than three applications per year in blackcurrants and no more than two applications per crop in other crops.

 

Apply as a FINE or MEDIUM spray as defined by BCPC.

Half fill the spray tank with clean water and start agitation.

Slowly add in the required amount of product.

Rinse empty containers and add rinsings to the spray tank.

Add the remainder of the water and continue agitation until spraying is complete.