sentences:  With presence of 30 pmol phaseolotoxin, it is able to reduce OCT activity to less than 20% of the one of unaffected OCT within, leading to arginine starvation and subsequently prohibiting protein synthesis.As a result, disease symptoms appear within 2 days, where chlorotic lesions appear as yellow halos surrounding black necrotic spots on the infected plants.Halo blight seems to thrive when the temperatures are cooler.