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Activities 2006 2018

  • 114 Public lecture/debate/seminar
  • 1 Participation in or organising a workshop, seminar, course
  • 1 Invited talk

Beheersing van suzuki-fruitvlieg in aardbeien

H.H.M. Helsen (Speaker)
10 Jan 2018

Activity: Talk or presentationPublic lecture/debate/seminar

Cinco años de experiencia con Drosophila suzukii en Holanda

H.H.M. Helsen (Speaker)
16 Jan 2018

Activity: Talk or presentationPublic lecture/debate/seminar

Use of toxic baits for the control of Drosophila suzukii

H.H.M. Helsen (Speaker)
11 Jan 2018

Activity: Talk or presentationPublic lecture/debate/seminar

Biologie en beheersing suzuki-fruitvlieg

H.H.M. Helsen (Speaker)
11 Jan 2017

Activity: Talk or presentationPublic lecture/debate/seminar

Biologie en beheersing suzuki-fruitvlieg

H.H.M. Helsen (Speaker)
14 Jun 2017

Activity: Talk or presentationPublic lecture/debate/seminar

Kirschessigfliegen-Kontrolle in Kirsche. Insektennetze als Teil einer integrierten Gesamtstrategie

H.H.M. Helsen (Speaker)
5 Dec 2017

Activity: Talk or presentationPublic lecture/debate/seminar

Biologie en beheersing suzuki-fruitvlieg

H.H.M. Helsen (Speaker)
16 Nov 2017

Activity: Talk or presentationPublic lecture/debate/seminar

Biological control of pests in pear orchards in the Netherlands

H.H.M. Helsen (Speaker)
12 Dec 2016

Activity: Talk or presentationInvited talk

Geïntegreerde bestrijding van perenbladvlo

H.H.M. Helsen (Speaker)
21 Apr 2016

Activity: Talk or presentationPublic lecture/debate/seminar

Bestrijding van frambozenschorsgalmug

Herman Helsen (Speaker)
23 Mar 2015

Activity: Talk or presentationPublic lecture/debate/seminar

Perenbladvlobestrijding, meer dan het juiste middel op het juiste moment

H.H.M. Helsen (Speaker)
30 Jan 2015

Activity: Talk or presentationPublic lecture/debate/seminar

Biology of Drosophila suzukii in the Netherlands

H.H.M. Helsen (Speaker)
18 Dec 2015

Activity: Talk or presentationPublic lecture/debate/seminar

Suzuki-fruitvlieg: Wat te leren van ervaringen 2015?

Herman Helsen (Speaker)
20 Nov 2015

Activity: Talk or presentationPublic lecture/debate/seminar

Biologie en beheersing van de Suzuki-fruitvlieg

H.H.M. Helsen (Speaker)
20 Nov 2015

Activity: Talk or presentationPublic lecture/debate/seminar

Biology and control of codling moth Cydia pomonella

Herman Helsen (Speaker)
5 Feb 2014 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Suzuki-fruitvlieg: de stand van zaken

Herman Helsen (Speaker)
14 Nov 2014 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Integrated control of pear psylla ; how to find the balance?

Herman Helsen (Speaker)
2 Feb 20144 Feb 2014

Activity: Talk or presentationPublic lecture/debate/seminar

Resultaten en discussie geïntegreerde bestrijding frambozenschorsgalmug en voorkomen van stengelziekten

Herman Helsen (Speaker)
4 Mar 2013 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Perenbladvlobestrijding is evenwichtskunst

Herman Helsen (Speaker)
31 Jan 2013

Activity: Talk or presentationPublic lecture/debate/seminar

De suzuki-fruitvlieg is alom aanwezig in Nederland. En nu?

Herman Helsen (Speaker)
22 Nov 2013

Activity: Talk or presentationPublic lecture/debate/seminar

Non chemical control of the raspberry cane midge Resseliella theobaldi

Herman Helsen (Speaker)
10 Jan 2013 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Suzuki-fruitvlieg wijdverspreid in NL. En nu?

Herman Helsen (Speaker)
13 Dec 2013 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Drosophila suzukii in Nederland: hoe beperken we de schade?

Herman Helsen (Speaker)
23 Nov 2012 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Perenbladvlo: natuurlijke vijanden en overige bestrijdingsstrategiën

Herman Helsen (Speaker)
3 Feb 2012 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Galmuggen in de laanboomteelt

Herman Helsen (Speaker)
29 Feb 2012 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Discussie- en brainstorm-avond rond het thema “Geïntegreerde bestrijding van perenbladvlo” met Gelderse fruittelers

Herman Helsen (Speaker)
10 Jan 2012

Activity: Participating in or organising an eventParticipation in or organising a workshop, seminar, course

Selectieve plaagbestrijding: onderzoek en praktijk

Herman Helsen (Speaker)
14 Feb 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Strategie fruitmotbestrijding in 2011

Herman Helsen (Speaker)
13 Apr 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Frambozenschorsgalmug als veroorzaker van stengelziekten

Herman Helsen (Speaker)
24 Feb 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Biologische bestrijding van frambozenschorsgalmug

Herman Helsen (Speaker)
23 Nov 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Strategie fruitmotbestrijding

Herman Helsen (Speaker)
31 Mar 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Selectieve technieken voor een geïntegreerde fruitteelt

Herman Helsen (Speaker)
17 Nov 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Geïntegreerde plaagbestrjiding in de boomkwekerij

Herman Helsen (Speaker)
28 Sep 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Is er iets mis met de perenbladvlobestrijding?

Herman Helsen (Speaker)
1 Dec 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Selectieve technieken voor een geïntegreerde fruitteelt

Herman Helsen (Speaker)
5 Jul 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmot: ervaringen uit het onderzoek

Herman Helsen (Speaker)
21 Jan 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Kopstekers in linde (hand-out)

Herman Helsen (Speaker)
19 Dec 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Biologie en bestrijding van de frambozenschorsgalmug

Herman Helsen (Speaker)
23 May 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Strategie fruitmotbestrijding in 2011

Herman Helsen (Speaker)
14 Apr 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Integrated control of pear psylla

Herman Helsen (Speaker)
29 Apr 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmotbestrijding zonder milieubelasting, residu en ongewenste nevenwerkingen

Herman Helsen (Speaker)
6 Jun 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Insectenetende aaltjes bestrijden frambozenschorsgalmug

Herman Helsen (Speaker)
18 Aug 2011 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmotbestrijding 2010, deel I

Herman Helsen (Speaker)
2 Feb 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmotbestrijding op peer

Herman Helsen (Speaker)
26 Nov 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

The host plant affects the survival of larvae of Codling moth Cydia pomonella L.

Herman Helsen (Speaker)
13 Sep 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Appelbloedluis bestrijden met natuurlijke vijanden

Herman Helsen (Speaker)
13 Jan 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Appelbloedluis bestrijden met natuurlijke vijanden Randwijk Cursus voor vruchtboomkwekers vruchtboomkwekers, medewerkers

Herman Helsen (Speaker)
13 Jan 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmotbestrijding 2010

Herman Helsen (Speaker)
19 Aug 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Frambozenschorsgalmug als veroorzaker van stengelziekten

Herman Helsen (Speaker)
26 Nov 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar

Fruitmotbestrijding 2010, deel II

Herman Helsen (Speaker)
11 Feb 2010 → …

Activity: Talk or presentationPublic lecture/debate/seminar