Halo Blight

Symptoms:

Symptoms of halo blight start as small water-soaked spots on leaves, which gradually turn dark brown. The spots remain small and become surrounded by a wide yellow-green halo. The spread and development of halo blight is favored by wet weather and plant injury from rain, hail, people or equipment. Halo blight develops best when temperatures are somewhat cool, in the low to mid 70s. (Common bacterial blight and bacterial brown spot prefer warmer temperatures, in the 80°-90°F range.)

Solutions:

Plant disease-free seed, rotate crops, burn infected plant tissues and clean contaminated equipment. Avoid working with plants when they are wet, as bacteria are easily transmitted by water. To prevent infection, or reduce its spread, apply a copper soap fungicide at 7- to 10-day intervals. After heavy rain, or when disease is increasing rapidly, apply every 7 days, or more often, at the highest recommended rate. We recommend Soap-Shield Flowable Liquid Copper Fungicide.


« Back to Garden Diseases

Related products

  • Soap-Shield® Flowable Liquid Copper Fungicide

    Our Soap-Shield Fungicide uses fixed copper, one of the oldest fungicides and bactericides used to control broad-spectrum plant disease. By mixing a soluble copper fertilizer with a naturally occurring fatty acid, a "true soap" is created....

    Read More

Sign-Up and Save

You’ll enjoy…

  • • Exclusive offers and specials
  • • First access to new products
  • • $25 off your first order of $50+

Gardens Alive!® respects your privacy. Unsubscribe anytime.

Close Pop Up