Ronald Valentin (@rvbiocontrol) 's Twitter Profile
Ronald Valentin

@rvbiocontrol

Biological control enthusiast & specialist since 1986 professionally , before that at family greenhouse operation in the Netherlands since 1971 in Biocontrol.

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calendar_today17-02-2016 21:28:48

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Ronald Valentin (@rvbiocontrol) 's Twitter Profile Photo
Ronald Valentin
@rvbiocontrol

3 years ago

In the city of Delft this afternoon. It is my favourite city in Holland with so much history. If you travel to Holland, this needs to be on your list instagram.com/p/CdooeIPDhklu…