Groen Agro Control wishes you a healthy 2020

Have you heard of the cress plants? Watch the video below and discover the small plants that are full of healthy nutrients.

Groen Agro Control wish everyone a Merry Christmas and a successful 2020

The management and staff of Groen Agro Control wish everyone a Merry Christmas and a special, enterprising, inspiring and successful 2020.

First pile ceremony for new office

On 9 December the first pile of Groen Agro Control (GAC) new office has gone in the ground. The construction of the office has become a fact with this first pile. GAC new office will be located in Delfgauw and will connect her two existing laboratories.

With the new building, GAC has the ambition to continue to grow. In the new building there is room for expansion of the existing laboratories, meeting rooms, a new canteen and a presentation room for conducting courses and symposia.

Opening hours during the holidays

During the holiday period we have different opening hours. Please keep this in mind if you want to send samples for analyses in this period.


Our laboratory is closed on Christmas days Wednesday 25th and Thursday 26th of December. Samples that we receive before and on Monday the 23th of December will be handled before the Christmas days.

 New year

On Tuesday 31st of December we are open until 16:00 hour and samples can be brought to our laboratory until 13:00 hours. We are closed on Wednesday 1st of January 2020.

 In case you have any questions, please contact us on +31 15 2572511


Preventing bacteria and viruses in a greenhouse with a good hygiene protocol

Good hygiene in horticulture is essential to keep bacteria, fungi and viruses out. For some viruses, such as the tomato brown rugose fruit virus (ToBRFV), hygiene is currently the only cure to prevent this. To ensure that the greenhouses comply with good hygiene, it is for example good to check whether the disinfection measures have been effective. Groen Agro Control can perform various analyzes to check this.

By going through risk spots with a swab or pressure plate, it is possible to check how clean a place is. A risk spot in the greenhouse for example is, the cultivation gutter. From here, recontamination to the new crop often occurs.

Wondering if your hygiene measures have been effective? Or do you need advice about hygiene measures? Then contact hygiene specialist Ines van Marrewijk by sending an email to or by calling 015 257 25 11. Or read more information here.

Delft Research Group has raised 57 places in the Hillenraad top-100 in three years

The Delft Research Group has secured the 23rd place in the Hillenraad100 this year. We have raised 57 places in three years. From position 80 in 2016 to position 23 in 2019.
We thank this position to the innovations technological solutions within our companies such as the reliable analyzes of our laboratory Green Agro Control.

MRL changes

On 29 October the EU published Regulation 2019/1791 announcing changes to the MRLs. Regulation 2019/1791 describes MRL adjustments of 1-decanol, 2,4-D, ABE-IT 56, cyprodinil, dimethenamid, fatty alcohols, florpyrauxifen-benzyl, fludioxonil, fluopyram, mepiquat, pendimethalin, picolinafen, pyraflufen-ethyl, pyridaben, S -abscisinic acid and trifloxystrobin in or on certain products. These changes are valid from November 18, 2019. The changes for Pyridaben are already in force since the 13th of August, 2019.

Groen Agro control visits the Fruit Attraction in Madrid

Groen Agro Control will visit the Fruit Attraction fair on 22 October in Madrid. Product manager Michel Witmer will be there to inform visitors about residue- and microbiological analyses in fruit and vegetables. You can make an appointment with him in advance via or by calling 015 – 257 25 11.

Lower reporting limit for phosphonic acid

Recently we have optimized our method for phosphorous acid. This makes it possible to determine this component in even lower concentrations. Residue of phosphonic acid can arise from the use of the fungicide Fosetyl-aluminum or the use of fertilizers based on potassium phosphonate.

The new reporting limit for phosphonic acid in fruit and vegetable products is: 0.05 mg / kg

Residue analysis by Green Agro Control Peru

Since January 2019, Groen Agro Control Peru has been conducting residue analyses for growers and exporters in Peru. With the opening of our branch in Lima, we have the opportunity to also do our extensive GC-MSMS & LC-MSMS residue screening (> 700 components) in Peru. Growers and exporters can use this to check whether their products meet European MRLs or additional retail requirements prior to shipment.
Do you want to know more about our services in Peru? Ask us about the possibilities or contact: Natxo de Elvira (