Newsletter International 2022

Dear reader,

You are now receiving our Newsletter Horticulture of 2022-Q4 containing the following topics:
*Water quality increasingly important
*Sampling under accreditation 
*Salmonella spp analysis in chocolate
*Big8 nutritional value and vitamins
*Accreditations of Normec Groen Agro Control
*Analysis of PFAS in food
*Short news 

We wish you a reading pleasure and a Merry Christmas and a Happy New Year!

There are quite a few plant diseases that cause problems in the substrate and water. When gas is used more sparingly, the crop can become more susceptible to the weak fungus Pythium or more seriously other plant pathogenic fungi and bacteria at a lower temperature. Did you know that when a crop suffers from a virus, the root system often also becomes more susceptible to disease

Storage of water has many preconditions. For underground storage, storage in a basin or in a silo, covered or not. Each form has its advantages and disadvantages. Realize that if you don’t use enough fine filters, more cleaning agent is obviously needed in the water. For example, if rainwater from the basin is not filtered sufficiently first, part of the peroxide in the water will react with the organic material from the rainwater alone. So take a good look at where you can make water better without resources with an extra filter and extra fine filters (25 – 50 mu). Rinsing water from sand and other filters often goes to the waste drain silo. Also make sure that there is at least a fabric filter, and preferably a finer filter afterwards, so that dirt does not enter the silo.

Ensure that water in day supply or clean drain silos does not remain in storage for too long. If the storage is not 100% necessary, leave the maximum level lower. So that it is refreshed more often. Or keep the daily supply at a lower EC so that it is also refreshed more often. This is better for the oxygen level in storage and prevents bacteria and fungi from growing to too high values.

Checking for microbiology in water is often done on the basis of counting bacteria and fungi, the so-called germ counts in colony-forming units per ml. That is counting living micros in water. So even if it is disinfected water or you dose a cleaning agent in the drip water, germ counts indicate the still living micros.

Normec Groen Agro Control developed packages with growers to get even more information from good irrigation water. The sooner you detect increased spore pressure from plant diseases, the better you can react before it becomes too contagious. That is why we have the ‘Gemcount Concentrated’ package for clean irrigation water. That it is suitable for monitoring the plant diseases Fusarium and Pythium/Phytophthora at the lowest level in addition to bacteria and fungi.

Not every system is the same, but here are reference values ​​that apply to bell peppers.

For micros that stimulate resilience balanced analysis, we also have packages that provide insight into the resilience micros. Examples are Fluorescent Pseudomonas, Lactic acid bacteria, Trichoderma spp., Bacillus. Ask for it if you want to rate it.

For more information, please contact Ines van Marrewijk.

Crop sampling for pesticide research now even better secured with accreditation

Sampling under accreditation ensures uniform and representative sampling. And above all, an independent sampling for pesticide research. This is necessary for quality certificates but also for damage caused by pesticide residues. The Dutch Accreditation Council (RvA) assesses and checks us for a correct method of sampling.
For example, Normec Groen Agro Control is unique in the Netherlands as a lab that accredited crop sampling for pesticide research. For all our certificates and accreditations I refer you to our website.

Salmonella spp in chocolate

In the preparation of chocolate, Salmonella spp can  end up in the chocolate from the raw materials (including eggs) or contamination via the production process. When ingesting this chocolate, the fat of the chocolate protects the Salmonella spp against the stomach acid and then enters the intestines unaffected. There it will settle on the intestinal wall and cause the health complaints listed below. It takes about 6 to 48 hours before a salmonella infection causes symptoms. This period is called the incubation period. The symptoms that can arise are: nausea, vomiting, diarrhea, abdominal cramps, fever and headache.
If you, as a producer of chocolate, want to have your product checked for Salmonella spp or other micro-organisms such as E coli, then you have come to the right place at Normec Groen Agro Control.  Within 2 days of receipt, we can indicate whether your product is suspicious of the presence of Salmonella spp.

Big8 Nutritional value and vitamins

The composition of your product can be determined by the analysis of nutritional values according to the “big eight“. By means of various analyses such as dry matter, ash, protein, fat, fatty acids, sugars, salt, fiber, carbohydrates and the energy value, you can have the legal values for your product determined. Since 2014, it has been mandatory for all processed foods in the EU to indicate nutritional values on the packaging (EC 1169/2011).

In addition to these mandatory values, you can also have the vitamins (A, B, C. D, E and K), organic acids, amino acids, main and trace elements and natural ingredients analyzed.

If desired, we can advise you which substances are relevant. This may vary by product. Please contact our Global Product Manager for more info.

Normec Groen Agro Control is registered for analyses on export onions of Indonesia

Normec Groen Agro Control can be used until 25 March 2025 under registration number: Lab. reg. No. 02/NLD/2022 carry out analyses on export onions for Indonesia. The Dutch embassy has indicated that we are recognized for residues of pesticides, heavy metals, mycotoxins and microbiological analyses. From collecting samples to delivering the desired certificate, you can contact us.

Accreditation on oilseeds

Normec Groen Agro Control has recently started to analyse the residues of pesticides on oilseeds under accreditation via flexible scope. For further information about which pesticides these are exactly, please contact Sylvia Toutziari

Residue analysis of PFAS in food

We get too much PFAS through food and drinking water, according to recent research by the RIVM. PFAS has long been known to disrupt the immune system and hormone housekeeping. It is expected that the PFAS problem will remain acute in the coming times.
That is why we developed our own method to analyze and detect PFAS in food.

An important step in tackling the PFAS problem is to map the pollution. There are several reasons to follow the concentrations of PFAS.

Checking your product for PFAS?
If desired, our samplers can come and take the sample independently at your location in the Netherlands.
For more information please contact us and consult with our colleague Sylvia Toutziari. Or call +31(0)15 257 25 11.


Normec Groen Agro Control also organizes a basic course residues. The basic course is intended for people in the fruit and vegetable and food industry who have little experience with this subject.

Contact our Global Product Manager for the possibility of an online course if you are based outside of the Netherlands or call at 31(0)15 257 25 11.

Short News

We are at the following fairs:
Fruit Logistica 8-10 February 2023
BioFach 14-17 February 2023
GreenTech 13-15 June 2023

Since October 2022, our standard has been Normec Groen Agro Control and we continue to do what we do best.

We can now also measure: Ethylene oxide, organic fertilizers and N-total, Compost under RHP and Keurcompost, and various new plant viruses.

Plant enhancers

Be well informed about what is in them. Ask for the safety sheet and try it first on a few plants. Sometimes undesirable substances such as pesticides or even herbicides, growth substances, heavy metals or high salinity levels come along. First have it analyzed with us and only then start using it is also possible.

Normec Groen Agro Control guarantees reliable analyses and good service. We are open to points for improvement and questions, and therefore would like to get in touch with you. This can be done via the link below to our general contact form or send an email directly to