Halo Blight (Beans)

Halo Blight

(Beans)

Description: Symptoms of halo blight start as small watersoaked

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 70’s. (Common bacterial

blight and bacterial brown spot prefer warmer temperatures,

in the 80-90°F range.)

Solution: 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 in films of water. To prevent infection,

or reduce its spread, apply Soap-Shield® Fungicidal Soap

at 7-10 day intervals. Following heavy rain, or when

the amount of disease is increasing rapidly, apply every

7 days, or even more frequently, at the highest recommended

rate.

 


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