Forage: Phytophthora Root Rot (Phytophthora medicaginis)

Excerpt from Chapter 3, Field Crop Protection Guide, Order this publication

Table of Contents

1. Integrated Pest Management Options
   • Seed Treatment
     • metalaxyl-M – Apron XL-LS
     • metalaxyl – Allegiance FL, Apron FL
2. Related links...

Integrated Pest Management Options

Plant resistant varieties that are treated with metalaxyl or metalaxyl-M. Drain excess moisture and avoid compaction. Avoid stresses such as insects, weeds and untimely cuttings that may stress the plants and make them more susceptible to Phytophthora. Do not cut during wet conditions. Crop rotation has little affect on the disease. Promote lateral root growth with good fertility program.

Seed Treatment

Comments (Days to harvest, label precautions, etc.)
For alfalfa, clover, and forage grasses. Do not use in hopper-box, planter-box, slurry-box or other non-commercial seed treatment applications at or immediately before planting. Do not graze or feed livestock on seeded area for 4 weeks after planting. Read label for information regarding resistant strains of fungus.

Comments (Days to harvest, label precautions, etc.)
Do not graze or feed livestock on seeded area for 4 weeks after planting.

Related links...

• Agronomy Guide for Field Crops - Publication 811
  • Forage: Phtophthora Root Rot
• Diseases
• Forages