Crazy top downy mildew

Symptoms often vary as a result of systemic infection. Leaf symptoms begin as chlorosis at the base and successively higher leaves show progressively greater chlorosis. On the lower leaf surface of infected leaves greyish white fungal growth may be observed. Severely infected plants are generally stunted and do not produce panicles. Green ear symptoms result from transformation of floral parts into leafy structures. The disease is prevalent during rainy seasons.