Soilborne Pathogen Control in UC Cultivars, Kirk Larson
Soilborne Pathogen Control in UC Cultivars, Kirk Larson
Soilborne Pathogen Control in UC Cultivars, Kirk Larson
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Phosphorous acid materials<br />
Phosphorous acid (H 3 PO 3 , Phosguard, etc.)<br />
dissociates <strong>in</strong>to phosphite ion (HPO 3<br />
-2<br />
)<br />
Phosphite readily taken up/translocated <strong>in</strong> plant<br />
but is not converted to phosphate (nutrient)<br />
Phosphite contributes little or noth<strong>in</strong>g to P<br />
nutrition of plant<br />
Phosphorous acid fungicides are effective<br />
aga<strong>in</strong>st water molds (Oomycetes) such as<br />
Phytophthora and Pythium<br />
Are stable <strong>in</strong> plant, apply <strong>in</strong>frequently (~1x/month)
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