Rice is Nice

According to the University of Arkansas parboiled rice hulls can be used effectively as a pine bark substrate.  They looked at spirea growing for one and two seasons long and measured the growth.  Their research proved that up to 40% of the pine bark can be substituted without having decomposition.  Growth was not reduced and irrigation remained the same.  For more information visit Nursery Management June 16, 2011.  http://www.nurserymanagementonline.com/researchers-study-parboiled-rice-hulls.aspx?

Pest Moth in Central Florida

Growers need to be on the lookout for a newly introduced pest in Florida. The European Pepper Moth, Duponchelia fovealis, was detected in two nurseries in Orange County in October 2010. This small brown moth attacks herbaceous ornamentals (including Anemone, Anthurium, Begonia, Cyclamen, Euphorbia, Gerbera, Kalanchoe, Limonium, Rosa), vegetable crops, herbs, and some aquatic plants grown both in the field and in greenhouses.

According to the Division of Plant Industry (DPI), the moth has been detected in 14 other states and likely entered Florida through transport of infected plants or other nursery material. The DPI pest alert can be found at http://bit.ly/kTD1Bc.

Duponchelia larvae feed on all parts of the plant and they can burrow into stems and even in roots near the soil line. A rather unusual behavior is that the caterpillars also feed on decaying plant material. In warm humid climates they are found mainly on outdoor plants, often in the damp lower portions near the soil. Look for signs of feeding, stem boring, webbing, or frass deep in the canopy.

Larvae have a shiny dark heads with creamy white to light brown bodies. Adults have a wingspan of about 1 inch. The forewings are gray-brown in color with 2 yellowish white transverse lines. The outermost of these lines has a pronounced “finger” that points towards the edge of the wing. Adults are strong fliers capable of traveling up to 60 miles on their own.

Should you detect this pest, contact your local county extension office.

This article was written by Kathy Oliver, ornamental production program assistant at Manatee County Extension. More articles are located here: http://manateeornprod.wordpress.com/