Effect of the inoculation of the maize bushy stunt phytoplasma on the development and kernel yield of corn hybrids

Abstract

The effect of the phytoplasma on the development and yield of ten corn (Zea mays) hybrids was evaluated. Ten-day-old plants were experimentally inoculated using ten infective insects of Dalbulus maidis/plant. Infected and healthy plants were compared regarding symptoms and yield components. Infected plants exhibited predominantly reddening of leaves, ear proliferation and stunting of different intensities. Reduction in plant height and kernel yield varied among hybrids. Reductions as high as 35% in plant height, 98% in kernel yield and number of grains/ear, 72% in ear size, 50% in number of lines/ear, and 18% in seed germination occurred in the most susceptible hybrids.