Filtering by tag: Pest Management ✕

dark green larger old leaf and new light green growth

English Ivy -- Spring is the best time to control this tough weed

English ivy (Hedera helix) creates a dense ground cover with attractive dark green foliage. But, left unchecked this introduced species invades woodlands, climbs (and kills) trees and is considered…

pinnately compound leaves and seed clusters

Tree of Heaven Control Guidelines

There's a lot of interest in controlling tree of heaven. Art Gover at Penn State conducted numerous trials on this weed and summarized the information in a great fact sheet.I can sum up the control…

in-row, bare soil with vegetation between rows.

New Publication - Weed Control in Christmas Trees

A new publication on weed management in Christmas trees by Dr. Saha at Michigan State is available.This publication provides good overview of traditional preemergence and postemergence weed control…

Weeds of the Northeast, 2nd edition book cover with feature bullets and plant photos

New Weed Identification Book Now Available

The newly revised Weeds of the Northeast 2nd edition is now available. WNE 2nd ed info slide 1 page This weed ID guide has been updated to include important weeds of the Mid-Atlantic States -- yes,…

oval cotyledons, shallow lobed leaves

Mugwort Seedlings Are Emerging (Yes, Seedlings!)

Mugwort plants spread by rhizomes. At least that's what I was taught. But mugwort can, occasionally, produce viable seeds. When the conditions are right, the plants produce copious amounts of viable…

opposite and deeply lobed leaves

Common Ragweed - a Challenging Weed to Control in Fraser Fir Production

Common ragweed is (as the name suggests) common in most cropping systems. Control strategies include a combination of preemergence and/or postemergence herbicides as well as cultivation and mulches.…

broad leaves, with indented tips

What Is That Weed? There's an App for That Too!

There are several mobile apps that are very useful in plant identification. These image-based identification tools have improved dramatically in the past few years. I have used iNaturalist with good…

photo of foliage, thick stems rooting at the nodes with subteranean flowers photo credit: J C Neal

Have You Seen Tropical Spiderwort?

Tropical spiderwort (Commelina benghalensis), a noxious weed, has been found in several landscape beds in Raleigh. See a fact sheet with photos and comparisons with the more common Asiatic dayflower:…

four photos, seedling and blue flowers

What’s That Pretty Weed? Ageratum

Ageratum conyzoides (tropic ageratum or billygoat weed) is a South American species that is now a common weed in nurseries and landscapes in the gulf coast states, and distributed as far north as…

close up of flower heads with salmon-red color

Have You Seen Thickhead in Your Garden?

No, I'm not talking about your brother-in-law. Thickhead or redflower ragleaf (Crassocephalum crepidioides) is an introduced weed that I'm observing with more frequency in nursery and garden centers…