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Browse by Author: Jeffrey Derr
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Preemergence Herbicide Efficacy in Nurseries and Landscape Plantings

By: Joe Neal, Jeffrey Derr, Chris Marble, Andrew Senesac

Preemergence herbicide efficacy summary chart, Ranking the efficacy of preemergence herbicides on most weeds of nursery and landscape plantings.

Gemini (isoxaben + prodiamine)

By: Joe Neal, Jeffrey Derr, Chris Marble Herbicide Information Factsheets

This pesticide factsheet covers the use and characteristics of Gemini (isoxaben + prodiamine).

Weeds of Container Nurseries in the United States

By: Joe Neal, Jeffrey Derr

Color guide to identification of weeds common in container nursery crop production. Also includes a table of preemergence herbicide efficacy on these species.

Weed Control

By: Joe Neal, Jeffrey Derr, Chris Marble, Andrew Senesac

Weeds reduce the aesthetic qualities of landscape plantings and compete with nursery crops for nutrients, water, and light. Root systems compete for nitrogen and water. Even seemingly non-competitive weeds like bittercress (Cardamine spp.) have been shown to reduce growth of container-grown plants. Tall weeds and vines shade crops, reducing photosynthesis and growth. Vining weeds such as morningglory (Ipomoea spp.) are particularly damaging because they disfigure stems and new growth. In landscape plantings, weeds must be controlled or removed to maintain quality aesthetics. Weeds may also need to be removed for health and safety reasons