Products

Mertect SC Fungicide

Uses

Crops

Mertect is registered for use on potatoes. Mertect can be used on seed, table and processing pota...

For management of

Black scurf (Rhizoctonia spp.); Fusarium dry rot (Fusarium spp.)*; Gangrene (Phom...

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Application Information

One 5 L container of Mertect will treat 56.6 metric tonnes of potatoes. Prepare a suspe...

Water Volume

Prepare a suspension of 7.5 L Mertect per 170 L water.
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application info

Tank Mixes

There are no registered tank mixes for this product. Application of UNLABELLED tank mixes is perm...

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tank-mixes info

Technical Information

Chemistry Group

Group 1 Fungicide

Active ingredients

thiabendazole

PHI: N/A
REI: 12 hours

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technical info

About this Product

Help maintain tuber quality in storage.

Product Benefits

  • Mertect can control labelled disease for several months after application.

Packaging

One case contains 4 x 5 L jugs.

Uses

For use on:

Mertect is registered for use on potatoes. Mertect can be used on seed, table and processing potatoes.

SEED POTATOES - Additional handling causes new wounds, but seed stock treated with Mertect holds up better during unpredictable shipping conditions and temporary pre-planting storage, helping maintain their vigour and quality with less decay. Mertect should not be applied to cut potatoes.

Mertect is also registered for use in apples and pears for diseases caused by Penicillium spp. and Botrytis cinerea.

For management of:

* Some strains of Fusarium spp. and Helminthosporium spp. are resistant to thiabendazole, the active ingredient in Mertect.

Application Information

Use Rates

  • One 5 L container of Mertect will treat 56.6 metric tonnes of potatoes.
  • Prepare a suspension of 7.5 L Mertect per 170 L water.
  • Apply 2 L of suspension per 1,000 kg of potatoes (91 mL/cwt).  (Example: If you are running 30 tonnes of potatoes per hour over your piler, you should be applying 60 litres of mixture per hour).

Water Volume

Prepare a suspension of 7.5 L Mertect per 170 L water.

Application Method

Post-harvest

Application Information

Apply to potatoes prior to storage.

Apply Mertect as a mist directly to the tubers as they move over the grading line or bin piler. It is important that each tuber be completely covered to protect all nicks, cuts and bruises. Potatoes must rotate along the conveyor line into storage to ensure complete coverage.  Apply the material at a point where the potatoes are rotating or dropping. Good rotation will help ensure complete coverage

Note: If potatoes are covered with mud, it may be necessary to forego the application of Mertect since the product may not reach the surface of the tuber and the application may be ineffective.

Apply Mertect to potatoes going into storage. Potatoes should be treated whether they will be used for seed, table, or processing. Seed and table potatoes can also treated coming out of storage, to help protect them during shipment to their final destination. Potatoes going directly from harvest to the fresh market should be treated with Mertect fungicide on the grading line, after washing. This helps to protect potatoes in transit and at their final destination.

Mixing Order

  1. Clean all mixing and application equipment before using Mertect.
  2. Shake the Mertect well.
  3. Fill the tank to 3/4 full of water, begin mechanical or bypass agitation, add the required amount of Mertect and fill the balance of the tank with water to the required level. Maintain agitation to prevent settling.
  4. For conventional spraying systems, maintain nozzle pressure at 80 to 100 psi. This creates a fine mist that helps ensure complete coverage yet keeps run-off to a minimum. For specially designed mist applicators, follow manufacturer's instructions.
  5. At the end of each day flush out the spray and nozzle equipment with clear water before closing down.
  6. For best results, start each day with fresh suspension, mixing only what you expect to use that day. Properly dispose of leftover mixture when you shut down for the night. If you have a considerable amount of the mixture left over at the end of the day, make sure it is agitated before starting the pump the following day. If you refill the tank before it is completely empty, use precise amounts of water and Mertect.
  7. Agitation is required to keep the product in suspension.

Use Restrictions

A limit of 500,000 kg of potato tubers may be treated per day per worker.

Tank Mixes

There are no registered tank mixes for this product. Application of UNLABELLED tank mixes is permitted by PMRA (Pest Management Regulatory Agency) as long as both products are registered and being used within their registered use pattern (i.e. application rate, application timing, number of applications per season, pre-harvest interval, pest claim, etc.).

Technical Information

Chemistry Group

Group 1 Fungicide

Mode of Action

The active ingredient in Mertect is thiabendazole and belongs to the benzimidazole family of fungicides. It is systemic and effective against the five major fungal storage pathogens of potatoes. It acts as a protectant against these pathogens by effectively preventing cell division. Mertect is a single-site fungicide so it is important to follow a well-planned pest management strategy to prevent disease resistance and prolong its usefulness. In recent years, resistance to many fungicides has increased until, in some cases, their usefulness is threatened. The best strategy to manage resistance is to prevent or delay it from occurring in the first place. Resistance management starts with an integrated approach to pest management. Experience has shown that strains of Fusarium and Helminthosporium resistant to thiabendozole may develop. Failure to control the disease will result in potato losses in storage.** A well planned harvest and storage strategy that reduces the incidence of diseases is important in minimizing the potential for resistance. Always follow label directions and use full label rates. If you have used Mertect as a storage treatment for potatoes and have a resistance concern, consider using a seed-piece treatment fungicide such as Maxim® PSP that has a different mode of action.

** Since the occurrence of resistance cannot be foreseen, Syngenta accepts no responsibility for any loss of, or damage to potatoes in storage, resulting from the failure of Mertect to control the resistant strains.

Resistance Management

Isolates of Fusarium dry rot (Fusarium spp.) and silver scurf (Helminthosporium spp.) have been identified as insensitive to thiabendazole, the active ingredient in Mertect. If resistance is suspected, use another fungicide with a different target site of action.

If Mertect (Group 1 fungicide) is used to protect potatoes in storage, do not use Senator® or any other product containing thiophanate-methyl for seed treatment the following spring.

Labels & MSDS

Disclaimer – ALWAYS read and follow label directions. Please use this information above only as a guideline and not an exact description.

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