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Weed identification the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest Florida Research and Education Center Immokalee, FL Horticultural Sciences

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Page 1: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed identification – the basics and significance

Ramdas Kanissery

Assistant Professor - Weed Scientist

May 29, 2018

Southwest Florida Research and Education Center

Immokalee, FL

Horticultural

Sciences

Page 2: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Introduction

- Significance of weed id

Weed identification - basics

- Morphology

- Life cycle

Weed id resources & tools

Plant identification services

Summary

Talk contents

Page 3: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Introduction

- Significance of weed id

Weed identification - basics

- Morphology

- Life cycle

Weed id resources & tools

Plant identification services

Summary

Talk contents

Page 4: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

“What are weeds?”

Page 5: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

A plant growing where it is not wanted

Purslane: weed in vegetable beds

“What are weeds?”

Page 6: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

A plant growing where it is not wanted

Purslane: weed in vegetable beds Purslane: Potted plant $10 - $15

“What are weeds?”

Page 7: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

“Weeds are plants that maintain

their abundance under conditions of

repeated disturbance”- Liebman

Page 8: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

“Weeds are plants that maintain

their abundance under conditions of

repeated disturbance”- Liebman

“A weed is a plant that has mastered

every survival skill except for learning

how to grow in rows” – Doug Larson

Page 9: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

What are weeds doing in my farm or garden?

Compete for

light, nutrients,

moisture and

space

Weedy row-middle in sweet corn SWFREC Veg Farm

Page 10: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Compete for

light, nutrients,

moisture and

space

Giant Amaranth or Pig weed Immokalee, FL

What are weeds doing in my farm or garden?

Page 11: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Interfere with

harvesting

Giant Foxtail in snap beans Figure credit: Mark Schonbeck, Virginia

Association for Biological Farming.

What are weeds doing in my farm or garden?

Page 12: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Figure credit: Mark Schonbeck, Virginia Association for

Biological Farming.

• Alternate host for pests and diseases

Source of pest

and diseases

What are weeds doing in my farm or garden?

Page 13: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Figure credit: Mark Schonbeck, Virginia Association for

Biological Farming.

• Alternate host for pests and diseases

Source of pest

and diseases

Weeds growing adjacent to the crop

row providing a moist and favorable

environment for fungal growth on the

tomato foliage

What are weeds doing in my farm or garden?

Page 14: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

“Weeds can hurt your garden and they

have to go”

Page 15: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

scouting

Selection of control timing

Sanitation

Systematic weed identification

“Four S of weed management”

Page 16: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

scouting

Selection of control timing

Sanitation

Systematic weed identification

“Four S of weed management”

Page 17: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Heavy infestation of a weed species

in a vegetable farm near Immokalee

Get the correct Id

Page 18: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Heavy infestation of a weed species

in a vegetable farm near Immokalee

- Not responding to Glyphosate or

Paraquat

- $$ spend but no control

Get the correct Id

Page 19: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed was correctly identified as

parthenium

- Specific herbicide used

Get the correct Id Parthenium

Page 20: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Parthenium

Sweet clover Ragweed

Get the correct Id

- Similarly looking weeds

- Responds differently to herbicides

Page 21: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

•Dayflower

Dayflower growing in the drip

line under the citrus tree

- Looks like a dicot

- Actually a monocot

- So better response to grass killers

Get the correct Id

Page 22: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

scouting

Selection of control timing

Sanitation

Systematic weed identification

“Four S of weed management”

“Very important step for efficient

and sustainable weed control”

Page 23: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Introduction

- Significance of weed id

Weed identification - basics

- Morphology

- Life cycle

Weed id resources & tools

Plant identification services

Summary

Talk contents

Page 24: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Structure and form

Life cycle

How it develops and reproduce

Page 25: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Structure and form

Life cycle

How it develops and reproduce

Page 26: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Leaf - shape, arrangement, venation etc.

Page 27: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Leaf - arrangement

www.horton.ednet.ns.ca/staff/Richards

Alternate Opposite Whorled

Page 28: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Leaf - shapes

https://www.teacherspayteachers.com

Orbicular Elliptical Obovate Ovate Reniform

Page 29: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Stem - presence or absence of hairs

Page 30: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Stem - presence of hairs

Florida Pusley – Richardia scabra

Page 31: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Roots – annuals vs perennials

Page 32: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Flower heads/seed heads - Shape, color etc.

Page 33: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Purple Yellow

Yellow v/s Purple

Nutsedge

Flower/Seed head

Morphology

Page 34: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Seed head

Bahia grass

‘V’ shaped seed head

Morphology

Page 35: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Seed head

Bermuda

grass

Seed head cluster of 3-5

Morphology

Page 36: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Seed head

Crow foot

grass

‘Seed head looks like a crow's foot

Morphology

Page 37: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Purple Yellow

Yellow v/s Purple

Nutsedge

Leaf tip

Morphology

Page 38: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Purple Yellow

Yellow v/s Purple

Nutsedge

Leaf tip

Morphology

Page 39: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Pennywort or Dollar weed:

- stem attaches to the leaf in the

center of the leaf

Morphology

Stem attachment to leaf

Page 40: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Pennywort or Dollar weed:

- stem attaches to the leaf in the

center of the leaf

Dichondra:

- stem attaches at the edge of a

kidney-shaped leaf

Morphology

Stem attachment to leaf

Page 41: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Pennywort or Dollar weed:

- stem attaches to the leaf in the

center of the leaf

Dichondra:

- stem attaches at the edge of a

kidney-shaped leaf

Creeping Charlie:

- stem attaches at the edge of leaf

- leaves have ragged edge

Morphology

Stem attachment to leaf

Page 42: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Yellow nutsedge

Sheath Color

Morphology

Yellow foxtail:

- Reddish leaf sheath

Nutsedge

- green leaf sheath

Page 43: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

- A cotyledon is the part of the seed that will grow into the leaves.

Dicots get their names from

having two cotyledons instead of

one.

http://jmgkids.us

Morphology

Monocots vs Dicots

Monocots has one cotyledon

Page 44: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Dicots get their names from

having two cotyledons instead of

one.

Monocots has one cotyledon

- A cotyledon is the part of the seed that will grow into the leaves.

Monocots vs Dicots

Page 45: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Monocot leafs have parallel or up and

down veins

Dicot leafs have veins that

are scatter or “netted.”

- They do not follow a pattern.

http://jmgkids.us

Monocots vs Dicots

Page 46: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

•Dayflower

- Actually a monocot

- So better response to grass killers

Monocot leafs have parallel or up

and down veins

Page 47: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Monocot can be identified by their flowers

parts. The flower parts on a monocot plant

come in multiples of 3

Dicot flower parts come in

multiples of 4 or 5

http://jmgkids.us

Monocots vs Dicots

Page 48: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Monocot

Grasses, sedges

Dicot

Broad-leaf

http://jmgkids.us

Monocots vs Dicots

Page 49: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Monocot

“Grasses vs sedges”

http://jmgkids.us

Monocots

Page 50: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

http://ohioplants.org/families-cyperaceae/

Sedges Grasses

Page 51: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Structure and form

Life cycle

How it develops and reproduce

Page 52: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Annuals

Life-cycle of weeds

Complete their life cycle

from seed to seed in

less than one year

Page 53: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Annuals

Amaranth

Pusley

Crab grass

Life-cycle of weeds

Page 54: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Winter Autmn Spring Sumer Fall

Winter

Annuals

Summer

Annuals

v/s

Life-cycle of weeds

Page 55: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Winter Annuals

Winter Autmn Spring Sumer

Fall moisture

Germination Rosette growth

Bolting

Flowering

Fall

Winter

Annuals

Summer

Annuals

v/s

Life-cycle of weeds

Page 56: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Summer Annuals

Winter Annuals

Winter Autmn Spring Sumer

Fall moisture

Germination Rosette growth

Bolting

Flowering

Fall

Winter

Annuals

Summer

Annuals

v/s

Life-cycle of weeds

Page 57: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Winter Autmn Spring Sumer Fall

Winter

Annuals

Summer

Annuals

v/s

Crab grass

Chickweed Pennycress

Life-cycle of weeds

Page 58: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Biennial

Life-cycle of weeds

- Emerge from seed & grow

during the first year

- Produce flowers and produce

seeds in the second year

Page 59: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Biennial

Cut leaf evening primrose

– Rosette stage (First year)

Life-cycle of weeds

Page 60: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Biennial

Cut leaf evening primrose

– Flowering stage (Second year)

Life-cycle of weeds

Rosette stage

Page 61: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Perennials

Life cycle of weeds

- Perennial weeds can grow and

produce flowers for multiple years

- Produce vegetative structures that

generate new plants

Page 62: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Perennials

Nut sedge

Creeping

beggar weed

• Produce vegetative

structures

• Eg., stolons,

rhizomes, tubers, or

large roots

Life cycle of weeds

Page 63: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Perennials

Rhizome

- underground

Stolon

- above ground

Stolon

Life cycle of weeds

http://ipm.ucanr.edu

Page 64: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed ID basics

Morphology

Identifying characteristics

Roots – annuals vs perennials

Page 65: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Perennials

Rhizome, Stolon

Life cycle of weeds

http://ipm.ucanr.edu

Annuals

Fibrous roots

vs

Page 66: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Introduction

- Significance of weed id

Weed identification - basics

- Morphology

- Life cycle

Weed id resources

Plant identification services

Summary

Talk contents

Page 67: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Weed Identification Tools

Stumped in the Field?

Page 68: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Web Help PLANTS National Database (USDA)

- Good information, some pictures

- Searchable format

- http://plants.usda.gov/

Weed Identification Tools

Page 69: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Atlas of Florida Vascular Plants

- University of South Florida

- Taxonomic information, distribution maps

- http://www.plantatlas.usf.edu/

Weed Identification Tools

Page 70: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Invasive Plants of the U.S.

- Identification and control

- http://www.invasive.org/

Plant Identification Tools

Page 71: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Aquatic and Invasive Plants - UF

- Excellent pictures and information

University of Florida - Plant Identification Resources

Page 72: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Range Cattle REC - UF

- Excellent pictures and information

University of Florida - Plant Identification Resources

Page 73: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

“Weed garden at

SWFREC

Immokalee”

University of Florida - Weed Identification Education

About 30 species of

weeds now

Programs planned

- Weed id training

- Youth programs etc.

Page 74: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Stumped in the Field?

Get the plant sample

Store in plastic bag with damp paper

towel

8-10 hours maximum!

Change paper often while drying

Don’t store it in your hot car

Page 75: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Stumped in the Field?

Get the plant sample

Store in plastic bag with damp paper

towel

8-10 hours maximum

Change paper often while drying

Don’t store it in your hot car

Pictures or Digital Images

- Overall view (growth habit)

- Specific characteristics

Page 76: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Stumped in the Field?

Plant diagnostic clinics

- County Extension

- SWFREC

UF herbarium service

Page 77: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Stumped in the Field?

Plant diagnostic clinics

- County Extension

- SWFREC

UF herbarium service

Page 78: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

UF Herbarium Service

Florida Museum of Natural History

379 Dickinson Hall

P.O. Box 110575

Gainesville, FL 32611-0575

(352) 273-1990

E-Mail: [email protected]

University of Florida - Plant Identification Resources

Page 79: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Introduction

- Significance of weed id

Weed identification - basics

- Morphology

- Life cycle

Weed id resources

Plant identification services

Summary

Talk contents

Page 80: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Systematic weed identification

• Important step in efficient weed

management

Weed identification

- Summary

Page 81: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Systematic weed identification

• Important step in efficient weed

management

Weed identification

- Summary

Weed ID basics

• Morphology

• Life cycle

Page 82: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Systematic weed identification

• Important step in efficient weed

management

Weed identification

- Summary

Weed ID basics

• Morphology

- Leaves, flower heads, roots

- Monocot vs Dicot

- Grass vs sedge

Page 83: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Systematic weed identification

• Important step in efficient weed

management

Weed identification

- Summary

Weed ID basics

• Morphology

- Leaves, flower heads, roots

- Monocot vs Dicot

- Grass vs sedge

• Life cycle

- Annuals

- Biennials

- Perennials – stolon, rhizomes

Page 84: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

Systematic weed identification

• Important step in efficient weed

management

Weed identification

- Summary

Weed ID basics

• Morphology

- Leaves, flower heads, roots

- Monocot vs Dicot

- Grass vs sedge

• Life cycle

- Annual

- Biennial

- Perennial – roots

Weed ID resources

• Web, UF resources, diagnostic clinic,

• Herbarium service

• SWFREC weed garden

Page 85: Weed identification the basics and significance€¦ · Weed identification – the basics and significance Ramdas Kanissery Assistant Professor - Weed Scientist May 29, 2018 Southwest

SWFREC weed science team

Thank you…

Contact

Ramdas Kanissery

UF/IFAS SWFREC

2685 State Road N

Immokalee, FL

Phone: (239) 658-3455

[email protected]