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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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