Pacific Northwest Plant Disease Management Handbook

Bean, Lima (Phaseolus vulgaris)-Gray Mold

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Latest revision: 
March 2024
Image related to Bean, Lima (Phaseolus vulgaris)-Gray Mold
White mold on the left and Botrytis sp. (gray mold) on the right.
Photo by Phil Hamm, 1991.

See:

Bean, Snap (Phaseolus vulgaris) - Gray Mold

Chemical control

  • Cannonball WP (Group 12) at 7 oz/A when 10% of the plants have at least one (1) open blossom. Preharvest interval is 7 days. 12-hr reentry.
  • Cueva at 0.5 to 2 gal/100 gal water on 7- to 10-day intervals. May be applied on the day of harvest. Poor control as a stand-alone product. 4-hr reentry. O
  • Inspire Super at 16 to 20 fl oz/A. Do not apply more than two (2) sequential applications. Do not use within 14 day of harvest. 12-hr reentry.
  • Luna Privilege at 6.84 fl oz/A on 14-day intervals. Do not make more than two (2) applications before alternating with a fungicide that has a different mode of action. Do not apply within 14 days of harvest. 12-hr reentry.
  • Omega 500F at 0.5 to 0.85 pint/A when 10% to 30% of the plants have at least one (1) open blossom and again 7 to 10 days later. Do not apply within 30 days of harvest. 12-hr reentry (72-hr reentry for high exposure activities).
  • OSO 5% SC at 3.75 to 13 fl oz/A on 7- to 14-day intervals. Can be applied the day of harvest. 4-hr reentry. O
  • Regalia (Group P5) at 1 to 4 quarts/A plus another fungicide on 7- to 10-day intervals. Does not benefit from the addition of an adjuvant. Preharvest interval is 0 days. 4-hr reentry. O
  • Trilogy at 0.5% to 1%. Not labeled for use in Oregon. Do not use above 90°F or when plants are under heat or moisture stress. Do not use when foliage is wet as good coverage is essential. Poor control as a stand-alone product. 4-hr reentry. O

Biological control

  • Actinovate AG at 3 to 12 oz/A as a foliar spray on 7- to 14-day intervals. 4-hr reentry. O
  • Actinovate Lawn & Garden at 1/2 to 1 teaspoon/gal water. H O
  • Double Nickel LC at 0.5 to 4.5 pints/A at planting and again at cultivation, can repeat on 10- to 14-day intervals. Can be applied the day of harvest. 4-hr reentry. O
  • Heads Up at 0.035 oz/34 fl oz water/360 lb seed will stimulates pest suppression system of plants. Efficacy unknown. 12-hr reentry. O
  • Prestop WG on 3- to 6- week intervals. 4-hr reentry. O
  • Serenade Opti at 14 to 20 oz/A on 7- to 10-day intervals. Applications can be made up to and the day of harvest. 4-hr reentry. O

Pscheidt, J.W., and Ocamb, C.M. (Senior Eds.). 2024 Pacific Northwest Plant Disease Management Handbook.
© Oregon State University.

Use pesticides safely!

  • Wear protective clothing and safety devices as recommended on the label. Bathe or shower after each use.
  • Read the pesticide label—even if you’ve used the pesticide before. Follow closely the instructions on the label (and any other directions you have).
  • Be cautious when you apply pesticides. Know your legal responsibility as a pesticide applicator. You may be liable for injury or damage resulting from pesticide use.

Trade-name products and services are mentioned as illustrations only. This does not mean that the participating Extension Services endorse these products and services or that they intend to discriminate against products and services not mentioned.

H - Home garden packaging commonly available.     O - Acceptable in organic production.