Four Star Culture Guide - 2019 - 69

HOSTA CONTINUED
GROWTH REGULATORS
A tank mix of B-Nine® (daminozide) at 2,500ppm + 5ppm
Sumagic® (uniconazole) is efficient at controlling height where
needed. Multiple applications may be needed at sevenday intervals on larger varieties or under warm greenhouse
conditions. A 6ppm - 10 ppm Bonzi® (paclobutrazol) drench
is also effective. 'Empress Wu' is much more likely to require
height control when compared to 'Autumn Frost' and 'Coast
to Coast.' Natural air or spacing wind movement and cooler
temperatures are also effective at controlling height and
producing a high-quality crop.
PEST and DISEASE MANAGEMENT
Insect pressure is often not a problem, but a good routine
scouting program is recommended to ensure that Aphids, Slugs,
Spider Mites, Thrips and other greenhouse pests don't cause
crop loss. Set rodent traps or bait with the winter months. Foliar
diseases should also be scouted for to prevent Leaf Spots,
Petiole Rot and Crown Rots.
OTHER TIPS
Hosta being grown and bulked when the days are naturally
short should be grown under long days using photoperiodic
lighting to keep them actively growing. Night interruption
lighting will achieve this.

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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