Potato Science Lecture 7 Potato diseases – foliar, soilborne, viruses, and tuber rots.
Biorational Management of Soilborne Diseases in …...Biorational Management of Soilborne Diseases...
Transcript of Biorational Management of Soilborne Diseases in …...Biorational Management of Soilborne Diseases...
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Biorational Management of Soilborne Diseases in
Annual and Perennial Crops
Soum Sanogo, Department of Entomology, Plant Pathology, and
Weed Science New Mexico State University
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Biological and
Abiotic Stresses
Production
Environment
Crop
Performance
Centrality of Production Environment
Biological and
Abiotic Stimulants
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Green Red
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Early LateMid
Soilborne Diseases
•Root and stem dysfunction
•Vascular dysfunction
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Verticillium
wilt
Phytophthora
blight
Fusarium/Rhizoctonia
root rot
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Verticillium
wiltPhytophthora
blightFusarium/Rhizoctonia
root rot
Vascular dysfunction Root and stem dysfunction
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Spatial Pattern/Verticillium wilt
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Spatial Pattern/Phytophthora blight
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Spatial Pattern/Phytophthora blight
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Alfalfa root rot/ Phymatotrichopsis omnivora
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Fruit & Nut tree root rot/ Phymatotrichopsis
omnivora
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Biological and
Abiotic Stresses
Production
Environment
Crop
Performance
Centrality of Production Environment
Biological and
Abiotic Stimulants
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Managing Production Environment to Reduce Disease
Problems
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Enhanced host nutrition
Increased population of antagonistic
microorganisms
Induced Resistance
Microbial/Botanical
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Microbial and Plant Interactions
Microbial interactions
that boost crop’s response
to pathogens
Microbial interactions
that reduce activities
of pathogens
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Synthetic microbiota
Single Microbe versus Multiple Microbes
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F,B
F
B
B
B
F
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Bacteria-based products
Serenade
(Bacillus subtilis QST 731)No Serenade
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(Fungi) Trichoderma-based products
harzianumatroviride citronoviride asperellumControl virens
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Active ingredients Double
Nickel
Serenade Root
Shield
Actinovate AGN Terra
Grow
Bacillus licheniformis X
Bacillus subtilis X X X
Bacillus pumilis X X
Bacillus amyloliquefaciens X X X
Bacillus megaterium X X
Trichoderma harzianum X X
Trichoderma reesei X
Trichoderma virens X
Streptomyces lydicus X
Commonalities in Microbial Formulations
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Chile wilt/ Verticillium
Viramontes Farms
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Application time Double Nickel (DN)
+ Serenade (SER)
DN+SER
+ Actinovate
AGN DN+SER
+TerraGrow
May 2 qts + 2qts 2 qt +2 qts
+ 6 oz
2 qts 2 qts + 2 qts
+ ¼ lb
June 2 qts + 2qts 2 qt +2 qts
+ 6 oz
2 qts 2 qts + 2 qts
+ ¼ lb
July 2 qts + 2qts 2 qt +2 qts
+ 6 oz
2 qts 2 qts + 2 qts
+ ¼ lb
August 2 qts + 2qts 2 qt +2 qts
+ 6 oz
2 qts 2 qts + 2 qts
+ ¼ lb
September 2 qts + 2qts 2 qt +2 qts
+ 6 oz
Microbial combinations
Diaz Farms
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Chile wilt/ Verticillium
Diaz Farms
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Chile wilt/Phytophthora
NMSU Campus, Las Cruces
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Chile wilt/Phytophthora-Rhizoctonia
Biad Chili Co.
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Chile wilt/Phytophthora
NMSU Campus, Las Cruces
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Chile wilt/Verticillium
NMSU Campus, Las Cruces
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Phytophthora Trial _ NMSU Leyendecker Science Center, Las Cruces
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Phymatotrichopsis Root Rot_ Tree Replant
Management
Treatments1. Ammonium sulfate (AMS*; 1 pound per 10 square feet)
+ Compost
2. AMS + Compost + Trichoderma-based product
(TerraGrow or RootShield Plus)
3. AMS + Compost + Gliocladium-based product (SoilGard)
4. AMS + Compost + Trichoderma + Gliocladium
*AMS may be strengthened with elemental sulfur. Work these
materials into the soil and then water (soak the soil to 2-3 feet
deep)
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Phymatotrichopsis Root Rot_ Tree Replant Management
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Cropping Systems, Crop Residues and
chile wilt pathogens
Justification
Residues from biostimulant and bioactive crops
reportedly reduce the incidence of soilborne
pathogens. No previous systematic studies in
chile cropping systems.
Experimental Approach
Soil amendments with residues or by-products
from biostimulant and bioactive crops.
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Enhanced host nutrition
Increased population of antagonistic
microorganisms
Toxicity of byproducts
released during decomposition
Poaceous
Cruciferous
Leguminous
Crop residues
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Activity of Bioactive Crop Residues
Chemical fumigants
KPAM
Allyl isothiocyanates
or AITC
Bioactive crops
Glucosinolates
(isothiocyanates or
mustard oils)
Methyl isothiocyanates
or MITC
Degradation Products
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(Courtesy Battad)
Biofumigation Using Mustard Seed Meal
(Brassica juncea)
AITC: 2.3 µg/g soil
after 5 hours
1,000 to 2,000 lb/acre
(Farm Fuel Inc., CA)
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Site 1 (drip-irrigated field)
1)Broadcast followed by bed shaping
2)Banded followed by bed shaping
Site 2 (furrow-irrigated field)
1) In furrow application in beds already shaped
2) Broadcast
3) Side dress of slurry
Application Methods
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Application Methods
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0
2
4
6
8
10
Control Banded Broadcast
Incid
en
ce (
%)
Treatment
Application Mustard Seed Meal _ Verticillium
Control
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Do mustard weeds have activity against chile
pathogens?
Question
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London rocket (Sisymbrium irio)
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London rocket
(Sisymbrium irio)
Flixweed
(Descurainia sophia)
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London rocket (Sisymbrium irio)
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London rocket (Sisymbrium irio)
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Treatments Temperature
(oC)
Duration (hours)
24 48 72
No Mustard Weed Meal 20 + + +
25 + + +
30 + + +
Mustard Weed Meal 20 - - -
25 - - -
30 - - -
Effect of mustard weed meal volatiles on growth and
germination of Phytophthora capsici/Verticillium
dahliae/Rhizoctonia solani
+ = growth/germination - = no growth/germination
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▪ Implications:
Host for beet curly top virus
and its insect vector (beet
leafhopper) Courtesy: R. Creamer
▪ Demonstration of activity of
London rockect and flixweed
against Phytophthora capsici,
Rhizoctonia solani, and
Verticillium dahliae
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Potential of pecan by-products for control
of soilborne diseases
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0
0.4
0.8
1.2
1.6
2R
ad
ial
gro
wth
(cm
)
Treatment
Pecan by-products and Phytophthora capsici
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Extract pH Sporangia
Production
Stem-5% 5.1 None
Stem-10% 5.1 None
Leaf-5% 4.9 None
Leaf-10% 5 None
Husk-5% 5.9 None
Husk-10% 5.9 None
Shell-5% 5 None
Shell-10% 5 None
Distilled water - Abundant
Pecan by-products and Phytophthora capsici
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Soil Amendment with Pecan Husk and Chile Wilt
------------------------------------AB-DTPA----------------------------------------
Sample ----------paste-----------% ------------------------------------ppm----------------------------------------------
ID # pH EC OM NO3-N P K Zn Fe Mn Cu C:N
mmhos/cm Ratio
PHU2 5.8 8.8 47.9 5.1 375 32230 23.5 11.9 69.4 17.5 40.55
PSH 5.0 1.1 71.5 1.5 409 4509 7.5 0.08 69.8 2.9 97.54
PHU1-SD 5.7 4.7 60.4 5.6 684 13450 19.3 1.3 48.0 8.9 35.23
------------------------------------ppm----------------------------------------------
Zn Fe Mn Cu C:N
Ratio
23.5 11.9 69.4 17.5 40.55
7.5 0.08 69.8 2.9 97.54
19.3 1.3 48.0 8.9 35.23
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Chile wilt/Verticillium
Vince Hernandez, Biad Chili Co.
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Chile wilt/Phytophthora
Lujan/Guzman/Sanogo
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Lujan/Guzman/Sanogo
Chile wilt/Phytophthora
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Chile wilt/Phytophthora
ControlSalicyclic
acid
Shell Husk
Lujan/Guzman/Sanogo
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Jalapeño Factor
Reduction of Phytophthora blight
in chile?
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0
1
2
3
4
5
6
6 8 10 12 14 16 18 20 22 24 26 28
Days After Inoculation
Dis
ea
se
Se
ve
rity
Sc
ale
CAYENNE
JALAPEŇO
JOE PARKER
NM-64
XX HOT
Cultivar pungency-Phytophthora blight
(Tahboub, Sanogo et al. 2008)
Little or no relationship between heat level and chile pepper root and
fruit infection by Phytophthora capsici
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Dura et al.
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Acknowledgments▪ New Mexico Ag Experiment Station
▪ New Mexico Chile Association
▪ New Mexico Chile Commission
▪ Tony Diaz and Ben Etcheverry, Mizkan Americas,
Deming
▪ Hispanic Farmers & Ranchers of America
▪ Hartman, Viramontes, Diaz, and Penn Farms, Deming
▪ Vince Hernandez, Biad Chili Co. & Resolex
▪ Willie Villegas, Hatch
▪ David Garcia, Doña Ana
▪ Jimmy & Faron Lytle, & Jerry& Shane Franzoy, Salem
▪ Brent Tanzy, Arrey
▪ Darren Gillis, Salem
▪ Phillip Lujan, EPPWS, NMSU
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Questions?