c
signifi cant injury to the crop. None of these insect pests require pre- ventive control strategies, but rou- tine
scouting
prevent salts from accumulating in the root zone. ‘Takion Blue’ reaches about half
the height of many C. persicifolia cultivars when fl owering and will usually not require height control strategies. One or two 2,500-ppm applications of daminozide (B-Nine or Dazide), seven days apart, can be effective at reducing plant height when applied just as the fl ower stems are beginning to elongate.
Insects and Diseases
Campanula can generally be
grown free of insects; aphids, cat- erpillars, leafhoppers, slugs, spider mites, thrips and whitefl ies may appear occasionally but without
programs should
detect their presence early enough to determine whether control strat- egies are necessary. Under the proper environmental
and cultural conditions, campanula also can generally be produced without the occurrence of plant pathogens. But several pathogens, including Ascochyta, Botrytis, Cer- coseptoria, Phyllosticta and rust can cause foliar leaf spots; and crown and root rots can be caused by the pathogens
Fusarium, Pythium,
Rhizoctonia and Sclerotium. Manage the environment and pre- vent these pathogens by providing proper plant spacing, adequate air movement, humidity control, good fertility and watering practices, or, if desired, a preventive fungicide program using the appropriate crop protection products.
ulture onnection
c
Forcing
‘Takion Blue’ can be forced into
bloom and are most commonly produced for early- to midseason sales. They have an obligate cold requirement for fl owering. They can be either vernalized as a large plug (72-cell or larger) or bulked up in the fi nal container size for at least six weeks before providing the necessary cold treatment. Pro- vide at least six to nine weeks of cold temperatures (less than 44° F) before forcing them in the spring. Following the cold treatment,
they will fl ower under any pho- toperiod (day neutral) and can be forced into bloom under natural day lengths. The length of the pho- toperiod has no effect on the time to fl ower; however, plants will be slightly shorter when they are grown under short days. The time to fl ower after vernal-
ization is a function of tempera- ture; at 65-68° F, they will fl ower in
fi ve to six weeks. They can also be grown in unheated structures or in outdoor production facilities for slightly later sales periods.
Availability
Seed of campanula ‘Takion Blue’
is available to growers through American Takii, Inc. (www.takii. com). Plugs can be acquired from many
reputable perennial plug producers or plant brokers. GPN
Paul Pilon is a horticultural con- sultant, owner of Perennial Solu- tions Consulting (
www.perennial-
solutions.com), and author of Peren-
nial Solutions: A Grower’s Guide to
Perennial Production. He can be reached at 616.366.8588 or paul@
perennial-solutions.com.
LearnMore
For more information
related to this article, go to
www.gpnmag.com/lm.cfm/gp051005
Everyone loves a little green.
Green is the color of life, of propagation, of environmental responsibility. As a business professional, you know it also happens to be the color of money. At T.O. Plastics, we re-use and recycle as a matter of course – and we know the value of an economic solution. Our plastic containers, fl ats and trays provide the highest standards of quality, reasonably priced.
The competition is green with envy.
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May 2010 GPN 35
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