Agrimm Technologies Ltd

Sentinel

Sentinel
Trichoderma Botryticide for viticulture and covered cropping.
  • Sentinel is a bio-fungicide, registered for the control of grey mould, botrytis cinerea, in the production of grapes and tomatoes.

  • Sentinel uses a single strain of Trichoderma, LU132, licensed from Lincoln University.

  • Sentinel is a preventative botryticide, colonising the flower and developing fruit to protect against the development of bunch rot.

  • Sentinel is Biogro certified and has nil withholding period in commercial crops.

Grapes: As per NZ wine advice, we recommend 50g/100L of water. The target rate is 200g/ha so adjust the rate accordingly.
Apply from 5% cap fall and then repeat at 80% cap fall, pre-bunch closure and veraison.
Alternately, apply at start of flowering and re-apply every 21-28 days depending on conditions.
Under conditions of high disease pressure, alternate Sentinel application with conventional chemical fungicides.
Sentinel may be applied up to harvest with no withholding period.

Tomatoes: 50g/100L water or 200g/ha.
Spray entire crop to run off every 14-21 days or soon after leaf or truss removal.

Detailed technical specifications, application instructions and safety information can be found in the following documents:

Sentinel Logo White

What is it and how does it work?

What is it?

Sentinel is a concentrated WP formulation for foliar spraying in Viticulture and Protected Cropping. Sentinel is registered for the control of botrytis cinerea or grey mould and can be applied right up to harvest with nil withholding period.

Sentinel was developed in conjunction with the Bio-Protection centre at Lincoln University, using a single unique strain of Trichoderma known as LU132. This beneficial fungus aggressively colonises leaves, flowers and fruit bunches where it actively competes with and parasitises grey mould, (botrytis cinerea) in vine crops, vegetables, orchard fruit and cut flowers.


What does it do?

Sentinel protects grapes by competitively excluding botrytis from uninfected sites and will also help to contain the spread of pre-existing botrytis to new sites. In the glasshouse, Sentinel helps tomatoes reach their potential for year-round production by protecting areas of leaf and truss removal. In this way, Sentinel acts as a protectant bio-fungicide.

Sentinel is a powerful weapon in the growers’ integrated pest management arsenal and can be used in conjunction with conventional chemical fungicides to develop a sustainable botrytis protection programme. Although, botrytis is widely renowned for developing resistance to conventional fungicides, no such resistance to Sentinel is likely to occur to due to its biological activity.

We have seen this in trials on cherries which showed that Sentinel was effective on specific strains of botrytis that had developed a resistance to registered dual-action chemical fungicides.

Key Features

Cost effective with proven efficacy
Nil withholding period. Use right up until harvest

Compatible with conventional fungicides in IPM programme

No build up of resistance with multiple applications
Biogro certified and safe to use

Trial Results

Sentinel reduced the incidence and severity of botrytis

Sentinel was compared to a full industry standard programme.

Sentinel was applied at 66g/100L and was applied in conjunction with either BioSea or Nufilm 17 to help with retention in the canopy.

Application was at 80% capfall and then pre-bunch closure and veraison.
Sentinel had two further applications over the month of ripening leading up to harvest on the 20th March 2009.

This trial took place in a Chardonnay vineyard in Auckland and was carried out by Allan Clarke during the 2008/2009 season.

Sentinel - Infection

% at Harvest

Nil with Holding

Sentinel has no residue concerns and so can be applied safely up to the day of harvest.
This second trial also took place around Auckland to take advantage of conditions conducive to Botrytis.

Again, we tested Sentinel compared to a full conventional programme.
We also tested the effect of Sentinel as a late season spray. These results were using Sentinel from veraison on the back of a full conventional programme.

Whilst we did not reduce the incidence of botrytis, we significantly reduced the severity of the infection.

% at Harvest

Tomato Plant Losses

Mainland Tomatoes originally approached Agrimm to help with Phytophthora in bagged tomatoes. This led to the use of Sentinel for botrytis in their worst affected glasshouses.

Sentinel was applied to the crop when botrytis infection was present and very quickly had an effect. Wounds that had sporulating infections dried up within a few days. The rate of new infections dropped rapidly.

Plant losses was estimated at less than 1% once Sentinel was applied compared to the season before. Application here was a full plant spray at time of infection and again 3 weeks later.

Apply Sentinel to leaf and truss removal wounds as soon as possible following the creation of the wound site.

Tomato Plant Losses