Weeds

Resources at Cornell

IPM Weed Management

From CCE

Managing Weeds

From Cornell's Department of Horticulture

Weed Ecology and Mangement

At Cornell University

Links

Weed Identification Guide

From Virginia Tech

Weed Guide

From Ohio State

Publications

Control of Broadleaf Lawn Weeds (PDF)

CCE - Suffolk County

Mechanical Weed Control (PDF)

From CCE

Weeds are a critical barrier to the establishment of perennial grasses during the first year. Research is currently being conducted to identify herbicides and mechanical methods that can be used in New York State on bioenergy feedstocks. Proper weed management is essential to successful feedstock production, especially during the first yeaf of production.

Recommendations include:

Proper seedbed preparation - apply Round-Up (glyphosate) in the fall before planting and again in the spring to ensure a clean seedbed
Cut first year stands in July at 10 inches to allow smaller warm season grasses to obtain light
Do NOT apply fertilizer in the first year - this will make the weeds grow
Apply a boadleaf herbicide, if they are a problem

Below are listed the most common broadleaf and grass weeds in New York State.

Broadleaf

Common burdock	Arctium minus (Hill) Bernh.
Common milkweed	Asclepias syriaca L.
Common ragweed	Ambrosia artemisiifolia L.
Curley dock	Rumex crispus L.
Garlic Mustard	Allaria petiolata
Lamb's-quarters	Chenopodium album L.
Pig Weed	Amaranthus retroflexus
Purslane	Portulaca oleracea L.
Redroot pigweed	Amaranthus retroflexus L.

Grasses

Barnyard Grass	Echinochloa crus-galli
Fall Panicum	Panicum dichotomiflorum
Green foxtail	Setaria viridis (L.) Beauv.
Johnson grass	Sorghum halepense
Large crab grass	Digitaria sanguinalis (L.) Scop.
Orchard grass	Dactylis glomerata
Quack Grass	Elytrigia repens
Witch grass	Panicum capillare L.

Sedges

Yellow nutsedge

Cyperus esculentus L.