Eggplant, Pepper, and Tomato XXIV - Phytophthora Blight ...

High Plains IPM Guide, a cooperative effort of the University of Wyoming, University of Nebraska, Colorado State
University and Montana State University.
Biological Control
Soil solarization and incorporation of organic amendments can reduce soil
inoculum levels and subsequent disease development.
Cultural Control
Plant high quality seed free from P. capsici. Plant into well-prepared raised beds
and evenly leveled fields that promote rapid drainage of irrigation and rain water.
Use drip rather than sprinkler or furrow irrigation if possible. Prevent excessive
moisture. Avoid planting into fields with known salinity problems. Straw
mulches reduce splash dispersal of soilborne inoculum and can reduce foliar
infection. Practice a three-year or longer crop rotation between susceptible crops.
Plant resistant or tolerant varieties if available.
Chemical Control
P. capsici resistance to metalaxyl and mefenoxam is widespread in some regions,
and alternative fungicides and disease management strategies should be used if
resistant strains are present.
Product List for Phytophthora Blight:
Pesticide
Product per
acre
Application
Frequency (days)
Remarks
Famoxadone/Cymoxanil
Tanos 8 oz 5-7 days Rotate and rotato
with fungicides with
a different mode of
action such as
chlorothalonil or
mancozeb;
Maximum of 72
ounces per season; 3
day PHI
Mefenoxam
Ridomil Gold EC 1-2 pts Broadcast or banded
at planting;
High Plains IPM Guide, a cooperative effort of the University of Wyoming, University of Nebraska, Colorado State
University and Montana State University.