Complaint Case Studies Examples Foreign matter in sweet corn

Some of the corns were black.

Foreign matter in sweet corn

Microscopic photograph of foreign matter in sweet corn

• Appearance: A black mold-like substance was attached to the surface of a corn grain of 10 x 8 mm in size.
• Optical Transmission Microscope: A large number of round fine particles were observed.
• Scanning electron microscope: Particles with a size of about 10 μm, spherical shape and many protrusions on the surface were observed.
• Fungi test: A black spore has been recognized.

It was thought that corn contaminated (black spores) was mixed in the black spore.

Black spear disease: Styloid disease with malformation of plant body. From the end of the rainy season, the outside forms a goal (bloated tissue) filled with black powder inside and forms on leaves, knots, and ears. When the goal matures, the surface is torn, and the black powder (black spores) inside is scattered and spread. The black spore is also an peritoneal spores, falling to the ground and becoming the source of transmission the following year, and it is said that they live in the ground for about five years.

Published on March 8, 2007