Leader growth control seen from a historical perspective

The history of the Top-Stop Nipper in pictures. (ved tryk på pictures kommer brugeren til menupunktet Results og kan der se et billede af tangens udvikling)

The desire to reduce the growth in the length of the leaders has no doubt been present for as long as Christmas trees have been grown commercially. The list below shows which means/methods have been tested where and when:

Year Location Means/Method
1985/86 Rye Nørskov Cutless
1986-88 Svenstrup Cerone, Ethrel, Regufon, Antergon, Bonzi
1988 HW Låsby Chemical methods
1992-1995 Tests by a chemicals company requested
1994 Strandegård Importance of bottom pruning
1994 Clausholm Chemical methods + removal of needles
1994-95 Randbøl-Nobilis Tubes, cutting, light access, light quality
1995 Strandegård Bottom pruning, tubes, taking needles off the leader
1995 Clausholm Chemical methods, tubes, taking needles off the leader
1996 Clausholm Chemical methods, tubes, taking needles off the leader, wounding
1996 Langesø og Skjoldenæsholm Tubes, taking needless off the leader, wounding
1996 Ry / Laven Wounding, peeling, ringing + cutless
1997 Esrum, Strandegård, Lindenborg Tubes, taking needless off the leader, wounding
1997 Ry Top-Stop used at provenience level (Ambro/Turkish fir)
1998 Ry Top-Stop related to the time of year
1998 Langesø Pilot trial with several different treatments
1999 19 locations Top-Stop different times, treatments, etc.
2000 Nr. Vilstrup/Rønnede 20 different treatments (Frans Theilby, FSL)
2000 Giesegård/Wedellsborg Cerone, Top-Stop, Moddus og PC 1 (PC-consult)
2000 19 locations DK, D, UK. Top-Stop – Different times and treatments
2001 20 locations DK, D, UK. Top-Stop – Different times and treatments
2002 19 locations DK, N, D, UK, IRL Top-Stop – Different times and treatments
2003 15 locations DK, D, UK, N Top-Stop – Different times and treatments
2004 14 locations DK, D og UK Top-Stop – Different times and treatments
2005 7 locations i DK og UK Top-Stop – Different times and treatments
2006 5 locations i DK og UK Top-Stop – Different times and treatments
2007 4 locations i DK og UK Top-Stop – Different times and treatments
2008-2017 5 locations i DK og Skotland Top-Stop – Different times and treatments