In The News

Natural Predators Do All the Work

February 28, 2014 by Hugh Darlington, ISA Certified Arborist
Arboretum Horticulturalist Charlie Jenkins and Chris Ward inspecting a Douglas Fir in the Pinetum area of Haverford College for insect infestation.

That’s as simple as it gets. Really. Natural predators do the work 24/7. 

John B. Ward and Co. is working with Haverford College to control an epidemic of armored scale and spider mites in the College’s Pinetum. The Pinetum was planted over 100 years ago to test lesser known conifer species’ suitability in Southeastern Pennsylvania’s climate and soil types. Today, there are several State Champion fir, spruce and pine species, but some have developed pest problems over the last decade. In keeping with the spirit of the Pinetum, we offered to try to control these pests using natural predators. Hopefully in the coming years we will be able to use these natural methods more frequently in our clients’ landscapes.

Charlie Jenkins shaking out a natural predator of the spruce spider mite on a Norway Spruce in the Pinetum on the grounds of Haverford College.
 
Mite damage on hemlock foliage
 
Hemlock infested with elongate hemlock scale
 
Releasing the small black predatory beetle Cybocephalus nipponicus that devours armored scale.
 
This article originally appeared in the Winter 2014 newsletter - John B Ward & Co. Timely Tree Tips

Recent News

March 16, 2018

The Barnes Arboretum Plant Sale

John B. Ward & Co is a proud sponsor of the 2018 Plant Sale at the Barnes Arboretum on Saturday May, 5, 9am-2pm

Shop for a...

Read More
March 16, 2018

Replanting the Community Tree Canopy Post-Ash Tree Decline

The native ash trees in North America, including Canada, are under attack from the Emerald Ash Borer (EAB). What began in southeastern Michigan...

Read More
March 16, 2018

Plant Health Care News 2018

White Prunicola Scale

White Prunicola Scale is an armored scale insect that feeds on lilac, holly and Prunus species (cherry, cherry laurel, plum). In...

Read More