Perennial Weeds: Characteristics And Identification Of Selected Herbaceous Species

The author has taken care to use examples of perennial weeds that are troublesome on a national scale, or representative of principal agricultural regions within the United States and Canada.

This organised and well-written one-of-a-kind text uses both tables and text to assist the reader in identifying each weed species. The text also includes 67 illustrations that highlight reproduction, over-wintering, and perennating parts. Perennial Weeds also corrects some misconceptions in the weed science literature as to whether the perennating organ is a root or a rhizome.

Not just another identification guidebook, Perennial Weeds takes the reader through root systems and rhizome anatomy to discuss exactly how perennial weeds propagate, so that eradication can be achieved in the most environmentally sound ways.

This book provides the reader with a wealth of information concerning the propagation of perennial grass-like and broadleaf weeds. It emphasises why perennial weeds are so difficult to control and offers suggestions for their control.

PART ONE: INTRODUCTION.

1. Characteristics of Perennial Weeds.

2. Control of Perennial Weeds.

PART TWO: Perennial Grass Weeds Reproducing from Buds on Creeping Rhizomes.

3. Johnsongrass (Sorghum halepense).

4. Quackgrass (Elytrigia repens; previously Agropyrons repens).

PART THREE: Perennial Grass Weeds Reproducing from Buds on Creeping Rhizomes and Stolons.

5. Bermudagrass (Cynodon dactylon).

PART FOUR: Grasslike Perennial Weeds.

A. Creeping Perennials Reproducing from Buds on Tubers.

6. Purple Nutsedge (Cyperus rotundus).

Yellow Nutsedge (Cyperus esculentus).

B. Noncreeping Perennials Reproducing from Bulbs.

7. Wild Garlic (Allium vineale).

Wild Onion (Allium Canadense).

PART FIVE: Simple Perennial Broadleaved Weeds Reproducing from Taproots and/or Root Crowns (Caudexes).

8. Dandelion (Taraxacum Officinale).

9. Curly Dock (Rumex crispus).

10. Broadleaf Plantain (Plantago major).

Buckhorn Plantain (Plantago Ianceolata).

Blackseed Plantain (Plantago Rugelli).

PART SIX: Perennial Broadleaved Weeds Reproducing from Buds on Creeping, Horizontal Roots.

11. Canada Thistle (Cirsium arvense).

12. Common Milkweed (Asclepias syriaca).

13. Field Bindweed (Convolvulus arvensis).

14. Hemp Dogbane (Apocynum cannabinum).

15. Hoary Cress (Cardaria draba).

Lens-podded Whitetop (Cardaria chalepensis).

Globe-podded Whitetop (Cardaria pubescens).

16. Horsenettle (Solanum carolinense).

Silverleaf Nightshade (Solanum elaeagnifolium).

17. Leafy Spurge (Euphorbia esula).

18. Red Sorrel (Rumex acetosella).

PART SEVEN: Perennial Broadleaved Weeds Reproducing from Buds on Creeping, Horizontal Rhizomes.

19. Stinging Nettle (Urtica Dioica).

20. Western Ironweed (Vernonia baldwinii).

PART EIGHT: Perennial Broadleaved Weeds Reproducing from Aerial Runners, Stolons, or Creeping Rhizomes.

21. Ground Ivy (Glechoma hederacea).

22. Creeping Woodsorrel(Oxalis corniculata).

Yellow Woodsorrel (Oxalis stricta).

Appendix.

Table 1. Root Systems of simple perennial weeds.

Table 2. Perennial weeds that spread by creeping roots.

Table 3. Perennial Weeds that spread by rhizomes.

Table 4. Perennial weeds that spread by means other than roots or rhizomes.

Table 5 . Selected Perennial Weeds identified by common and scientific names and grouped as grasses, herbaceous broadleafs, vines, and woody plants.

Glossary.

Index.