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| Citrus—Arizona, California, Florida, Texas |
Phytophthora Root Rot and Foot Rot Control Phytophthora root and foot rot is caused by multiple species of the soilborne pathogen Phytophthora and is the most economically damaging soilborne disease of citrus. Infection of fibrous roots can lead to poor development or death of trees. Researchers have shown that trees affected with greening, or Huanglongbing (HLB) are more susceptible to Phytophthora diseases than non-infected trees. The widespread nature of HLB in Florida has been linked to an uptick in losses to Phytophthora. Along with sound cultural practices, fungicides are a critical component of a management plan for Phytophthora. Presidio® Fungicide is targeted chemistry that protects citrus threatened by Phytophthora root rot and foot rot. Novel mode of action —sole member of FRAC Group 43 Proven performance and highly systemic movement through the plant Focused —ideal rotational chemistry for Phytophthora management—rotation between modes of action is critical for resistance management
Target Disease
Crop
Use Rate
Phytophthora root rot and foot rot ( Phytophthora spp.)
Citrus fruit
4 fl oz/A
Presidio Reduces Phytophthora Root Rot
45
Presidio significantly reduced populations of Phytophthora in soil to less than 10 propagules/cc of soil in Florida research trials. Research has shown that populations above 10 propagules/cc are likely to cause economic loss.
b
30
15
Means followed by the same letters are not significantly different (P≤0.10). Source: University of Florida
b
a
0
Untreated
Presidio 4 fl oz/A
Ridomil Gold® SL 1.5 fl oz/20 trees
140
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