Yellow Vine Decline of Cucurbits

1
Yellow Vine Decline of Cucurbits

• New disease squash, pumpkin, melon
• Bacterium Serratia marcescens
• Vectored by squash bug
• Range
• Oklahoma, Texas, Kentucky
• Not confirmed in OH but suspected

2
Yellow Vine Decline

• gt28 days until symptoms seen
• First plants usually turn yellow
• Cut stem shows phloem ring is brown
• Plants collapse prior to fruit maturity
• Please alert diagnostic clinic if found

3
Yellow Vine Decline

• Control of squash bug as vector
• Recommendations from Kentucky
• Must start control on day of planting
• Soil treatment with Admire or Platinum (although
  squash bug not on labels)
• or weekly foliar treatment with Pounce or other
  pyrethroid
• Row covers are a mechanical option
• Other ideas
• Marathon II (by Olympic), same AI as Admire,
  allowed on greenhouse transplants apply 1-2 d
  before transplanting