Forage Diseases

Information about Forage Diseases

Published on February 27, 2008

Author: Susann

Source: authorstream.com

Content

Forage Diseases:  Forage Diseases Dollar Spot Sclerotinia homoeocarpa :  Dollar Spot Sclerotinia homoeocarpa This disease is most likely to be observed from fall through spring. It will be observed on areas with low nitrogen levels. Other factors associated with the disease are a dry root system associated with a humid leaf canopy. Dollar Spot Sclerotinia homoeocarpa :  Dollar Spot Sclerotinia homoeocarpa Brown to straw-colored patches of dead grass will develop. Irregular, light tan lesions with distinct brown borders will be present on the leaves at the outside edge of the patch. White, cottony mycelia may be observed in early morning hours when dew is present. Control of Dollar Spot:  Control of Dollar Spot Keep up N applications Keep up soil moisture Helminthosporium Leaf Spot Bipolaris, Drechslera and Exserohilum spp. :  Helminthosporium Leaf Spot Bipolaris, Drechslera and Exserohilum spp. Occur during periods of high humidity and warm temperatures. Mainly affects bermudagrass Will impact yields and quality of grass/hay The most damage occurs when fungus attacks stems and roots. Leaf spot:  Leaf spot Dracena Bipolaris leaf spot:  Dracena Bipolaris leaf spot Control of Leaf Spot:  Control of Leaf Spot Variety selection Soil fertility Irrigation control Thatch removal Timely harvest Stunt Virus on Perennial Peanut Cucumovirus :  Stunt Virus on Perennial Peanut Cucumovirus Leaves from peanut plants infected with peanut stunt virus are malformed and curl up at the edges. Infected leaves may be paler green and/or yellowed. The virus can overwinter in wild or forage legumes Vectored by aphids. Interveinal chlorosis of Stunt Virus on Perennial Peanut :  Interveinal chlorosis of Stunt Virus on Perennial Peanut Pythium blight Pythium aphanidermatum:  Pythium blight Pythium aphanidermatum Grease spot, cottony blight, or pythium Affects ryegrasss and cool season grasses overseeded on bermuda Begins as small irregular patches 1-4 inches in diameter Affected blades appear dark and water soaked Pythium Blight:  Pythium Blight Pythium blight:  Pythium blight Occurs where there is little air movement Grass in young seedling stage is most susceptible. Spread to new sites by movement of contaminated soil, mowing implements, grass clippings, or by surface water runoff. Pythium blight control:  Pythium blight control Cultural methods Well-drained soil Promote air movement Minimize traffic over affected areas Overseed as late as possible Remove thatch Ergot Claviceps purpurea:  Ergot Claviceps purpurea Attacks more than 200 grass hosts. Reduces seed production and can be toxic to livestock. The most common sign of ergot is the dark purple to black sclerotia found in the head of cereals and grasses before harvest. After harvest, these dark bodies are evident in the grain. Ergot Control:  Ergot Control Ergot control is aided by crop rotation.   Deep tillage is also beneficial. Clean seed must be used to prevent direct contamination of the new crop. Mowing of grass in pastures and roadsides before flowering may be beneficial Barley Yellow Dwarf :  Barley Yellow Dwarf Barley yellow dwarf of wheat and barley, and red leaf of oats are two small grain diseases caused by the barley yellow dwarf virus (BYDV). This virus is transmitted by many aphid species. Seedlings are most susceptible to infection. Barley Yellow Dwarf on Oats:  Barley Yellow Dwarf on Oats Barley and wheat leaves, particularly the flag leaf, become yellow. Yellowing of the flag leaf can help distinguish infection by BYDV from nutritional deficiencies. Control of Barley Yellow Dwarf:  Control of Barley Yellow Dwarf Avoidance of aphids during seedling stage Plant later in the fall or early in the spring. Control aphids chemically may be an option, but not cost effective Select varieties tolerant of the virus. Questions?:  Questions? Prepared by Libbie Johnson

Related presentations


Other presentations created by Susann

Athletic Footwear Industry
31. 03. 2008
0 views

Athletic Footwear Industry

radioactivity 1
07. 02. 2008
0 views

radioactivity 1

Africa Unit 3
02. 04. 2008
0 views

Africa Unit 3

Market Research
03. 03. 2008
0 views

Market Research

module 1 intro
08. 05. 2008
0 views

module 1 intro

zly
07. 05. 2008
0 views

zly

031016 inhale montreal
02. 05. 2008
0 views

031016 inhale montreal

new leg
02. 05. 2008
0 views

new leg

JM UWA Luncheon Oct2007
30. 04. 2008
0 views

JM UWA Luncheon Oct2007

Tutorial
24. 04. 2008
0 views

Tutorial

NSW China Briefing
22. 04. 2008
0 views

NSW China Briefing

Weber Fall06
18. 04. 2008
0 views

Weber Fall06

SharksPP
17. 04. 2008
0 views

SharksPP

Dennill Managing Your Risk
09. 01. 2008
0 views

Dennill Managing Your Risk

AAS Presentation
10. 01. 2008
0 views

AAS Presentation

GANG Powerpoint
11. 01. 2008
0 views

GANG Powerpoint

885
15. 01. 2008
0 views

885

Chapt 05
16. 01. 2008
0 views

Chapt 05

Class11
09. 01. 2008
0 views

Class11

Mercantilism
18. 01. 2008
0 views

Mercantilism

ppe p sp
20. 01. 2008
0 views

ppe p sp

training docs
21. 01. 2008
0 views

training docs

eukaryoticorgs
22. 01. 2008
0 views

eukaryoticorgs

LimitedBrandsPresent ation
04. 02. 2008
0 views

LimitedBrandsPresent ation

MLA outreach presentation
15. 01. 2008
0 views

MLA outreach presentation

CenturyTheatre Ad Sept06 gg
15. 01. 2008
0 views

CenturyTheatre Ad Sept06 gg

LutzWalter
22. 01. 2008
0 views

LutzWalter

secondary aluminum
12. 02. 2008
0 views

secondary aluminum

2 3 Ben Sekamatte
25. 01. 2008
0 views

2 3 Ben Sekamatte

Clara Qualizza
19. 01. 2008
0 views

Clara Qualizza

Session 4 Oper vs Aux
28. 01. 2008
0 views

Session 4 Oper vs Aux

Ch5 6 10 14
29. 01. 2008
0 views

Ch5 6 10 14

Rites of Passage
29. 01. 2008
0 views

Rites of Passage

Jonah Presentation
30. 01. 2008
0 views

Jonah Presentation

tjea
07. 02. 2008
0 views

tjea

firesafety
07. 02. 2008
0 views

firesafety

Wiriya Suwannet
10. 01. 2008
0 views

Wiriya Suwannet

s Oceans
13. 02. 2008
0 views

s Oceans

Freeman
20. 02. 2008
0 views

Freeman

SlaneP constraints
22. 01. 2008
0 views

SlaneP constraints

EPD2 Present and Future
28. 02. 2008
0 views

EPD2 Present and Future

INSOMNIA DrJeanGrenier Nov 2007
28. 02. 2008
0 views

INSOMNIA DrJeanGrenier Nov 2007

SAAS Gianessi
28. 01. 2008
0 views

SAAS Gianessi

5th Grade FCAT Review
14. 03. 2008
0 views

5th Grade FCAT Review

talent engine discussion guide
16. 03. 2008
0 views

talent engine discussion guide

Lecture14 TheEarth
11. 03. 2008
0 views

Lecture14 TheEarth

GEO205 powerpoint 12
27. 03. 2008
0 views

GEO205 powerpoint 12

Parasitology Basic 07
28. 03. 2008
0 views

Parasitology Basic 07

world geography
15. 04. 2008
0 views

world geography

Irwin
16. 04. 2008
0 views

Irwin

BuildingWordnets
05. 02. 2008
0 views

BuildingWordnets

Douglas Morgan
16. 01. 2008
0 views

Douglas Morgan

Wien
05. 03. 2008
0 views

Wien

NSO 2007
14. 01. 2008
0 views

NSO 2007

GeneralOutreachKansas
29. 01. 2008
0 views

GeneralOutreachKansas

Rita Tucker
25. 01. 2008
0 views

Rita Tucker

Bob Moseley Kawagebo
05. 02. 2008
0 views

Bob Moseley Kawagebo

michigan0314b
15. 01. 2008
0 views

michigan0314b

Canning Fruits
06. 02. 2008
0 views

Canning Fruits

English Labofa EGO Nordic
05. 03. 2008
0 views

English Labofa EGO Nordic

SlidesWithNotes
14. 02. 2008
0 views

SlidesWithNotes

GMkk
24. 01. 2008
0 views

GMkk

20030909152346 EVI
13. 01. 2008
0 views

20030909152346 EVI

07nrm
22. 01. 2008
0 views

07nrm

praca5
03. 03. 2008
0 views

praca5

majingweili
14. 04. 2008
0 views

majingweili

Module3Presentation
25. 02. 2008
0 views

Module3Presentation

Jones NDDA
20. 01. 2008
0 views

Jones NDDA

Thornton CreatingAClimate
17. 01. 2008
0 views

Thornton CreatingAClimate

FirstHalfStudyGuide
15. 02. 2008
0 views

FirstHalfStudyGuide