Title: Florida plant disease management guide
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Permanent Link: http://ufdc.ufl.edu/UF00053871/00016
 Material Information
Title: Florida plant disease management guide
Alternate Title: Ornamentals and turf
Fruit and vegetables
General plant pathology, field crops and pasture grasses, fungicides, adjuvants and application techniques
Physical Description: v. : ; 28 cm.
Language: English
Creator: University of Florida -- Dept. of Plant Pathology
Florida Cooperative Extension Service
Publisher: The Extension
Place of Publication: Gainesville Fla
Frequency: annual
regular
 Subjects
Subject: Plant diseases -- Periodicals -- Florida   ( lcsh )
Pesticides -- Periodicals   ( lcsh )
 Notes
Statement of Responsibility: Plant Pathology Dept., University of Florida and Institute of Food and Agricultural Sciences, Florida Cooperative Extension, University of Florida.
Numbering Peculiarities: Issued in three volumes: v. 1, General plant pathology, field crops and pasture grasses, fungicides, adjuvants and application techniques; v. 2, Ornamentals and turf; v. 3, Fruit and vegetables.
General Note: Description based on: 1999-2000.
General Note: "SP-52"
 Record Information
Bibliographic ID: UF00053871
Volume ID: VID00016
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 44549741
lccn - 00229071
 Related Items
Preceded by: Florida plant disease control guide

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PDM G-V3-44
U UNIVERSITY of
UF FLORIDA
IFAS Extension



2006 Florida Plant Disease Management Guide: Pea,

English and Snow1


Tom Kucharek and Ken Pernezny2


Specific Common Diseases

Damping-off (Pythium spp., Rhizoctonia
spp., Fusarium spp.)

Symptoms: Several soilbome fungi will rot pea
seed and seedlings from planting time through
emergence. This condition is aggravated by deep
planting, excess moisture, and by the presence of
newly incorporated green plant material such as
weeds or cover crops. Later stages of infection by
these fungi often produce root rots.

Cultural Controls: Control of root rots and
damping-off can be aided by preventing saturation of
the soil and by chopping all cover crops and allowing
them to dry thoroughly before disking or plowing
under. Green cover crops should be turned under 6 to
8 weeks before planting time, and the land should be
kept disked in order to prevent a new grass/weed
cover from developing. See Plant Pathology Fact
Sheet PP-1.

Chemical Controls: See PPP-6.


Powdery Mildew (Oidium sp.)

Symptoms: The characteristic sign is the white,
powdery-like fungal mycelium that covers portions of
leaves, stems and pods. Heavy infection can result in
leaf death. Occasionally small, black, dot-like fruiting
structures (cleistothecia) may form on the older areas
of white fungal mycelium. This disease can be
serious during the cool winter months when peas are
grown.

Chemical Controls: See PPP-6.

Pythium Root Rot (Pythium spp.)

Symptoms: This disease is worse in wet seasons,
on low, poorly drained fields. This fungus can cause a
pre-emergent and post-emergent damping-off
problem. Older plants become infected through small
feeder roots. The infection proceeds into the taproot
producing a soft, gray to brownish-black surface rot
up to the soil surface or slightly beyond. A diagnostic
field symptom is the way the outer root tissue
"sloughs off' leaving the central core, when the root
is slipped between two fingers. Infected plants appear


1. This document is PDMG-V3-44, one of a series of the Department of Plant Pathology, 2006 Florida Plant Disease Management Guide, Florida Cooperative
Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Date Revised: December 2005. Please visit the EDIS Web site at
http://edis.ifas.ufl.edu.
2. T.A. Kucharek, professor emeritus, Plant Pathology Department, K. L. Pernezny, professor, Plant Pathology Department, Everglades Research and
Education Center--Belle Glade, FL; Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville,
FL 32611.

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and
other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex,
sexual orientation, marital status, national origin, political opinions or affiliations. U.S. Department of Agriculture, Cooperative Extension Service,
University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Larry
Arrington, Dean






2006 Florida Plant Disease Management Guide: Pea, English and Snow 2


stunted and pale yellow-green above ground. In very
moist weather, a foliar blight may occur as the
(Pythium) fungus infects the apical or axillary buds.
Affected foliage appears watersoaked, dying and
desiccating rapidly. The disease progresses down the
plant canopy, girdling stems and killing all foliar
parts beyond the point of girdling.

Cultural Controls: Avoid low-lying, wet fields.
Do not plant too deep. See Plant Pathology Fact Sheet
No. 53.

Chemical Controls: The damping-off phase may
be controlled by seed treatment fungicides.

Rhizoctonia Stem Canker (Rhizoctonia
solani)

Symptoms: Rhizoctonia solani may infect peas in
the seed, seedling or mature plant stage. Seed may
fail to germinate or young seedlings may fall over at
soil line due to fungal invasion. Seedlings as well as
mature plants exhibit a reddish-brown lesion or
canker on the lower stem that will enlarge to a point
of girdling the plant causing plant death.

Cultural Controls: Avoid planting in soil
containing plant debris that has not fully decomposed.
Plant seed properly to encourage rapid germination
and establishment.

Chemical Control: Use a seed treatment
fungicide.




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