Four Star Culture Guide - 2019 - 43

OSTEOSPERMUM CONTINUED
PEST and DISEASE MANAGEMENT
Proper temperature, light levels, air movement, humidity
control, and water management will eliminate most disease
issues. Avoid darker, warmer and more humid areas with poor
air movement. A broad-spectrum fungicide such as Banrot®
(etridiazole plus thiophanate-methyl) can be helpful when
applied at transplant, if desired. Scout for Botrytis and consider
a follow-up preventative fungicide application if pinching or
trimming plants. Also scout for any plant "melting." This soft rot
is usually a sign of overwatering and poor growing conditions.
Medallion® (fludioxonil), Pageant® (pyraclostrobin + boscalid) or
Cease® (Bacillus stubtilis) are effective to minimize the spread
of soft rot. Leaf burn and spotting from the use of copper-based
fungicides are a concern. Thrips can also be a concern and
crops should be scouted on a regular basis.
OUTDOOR GROWING SCHEDULE
Soprano and Bright Lights Osteospermum can be grown
outdoors in the third earliest spring conditions (light frost or
late April/mid-May in Michigan). While very cold-tolerant,
it is difficult to size up due to its more compact nature in
cooler outdoor environments. This recommendation is based
on average spring weather and should be adjusted for
unseasonably severe or unseasonably mild conditions.

OTHER TIPS
* Soprano and Bright Lights Osteospermum should be
transplanted soon after delivery of the rooted cuttings.
Stress in the 104 tray can lead to plant loss.
* A well-drained soil mix will lead to better water management
and root growth.
* Please note the warmer recommended rooting out
temperatures. If possible, follow this for the first 7 - 14 days
before lowering to growing on levels.
* Maintain cooler growing temperatures, drier soil, proper soil
pH, bright growing conditions, controlled humidity levels, and
good air movement for best plant performance.
* Soprano and Bright Lights Osteospermum can be
grown cooler than listed, but additional crop time
will be required for both flowering and plant sizing.
* Scout for Thrips and treat as needed.
* Purple is the most vigorous and should be watched more
closely for possible PGR needs.

The rates and chemicals listed are based on our southeast Michigan growing conditions, and are not recommended for nationwide application.
Please adjust the rates and spray applications to your location and facility.

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Four Star Culture Guide - 2019

Table of Contents for the Digital Edition of Four Star Culture Guide - 2019

Contents
Four Star Culture Guide - 2019 - Cover1
Four Star Culture Guide - 2019 - Contents
Four Star Culture Guide - 2019 - 1
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