Production Factors Affecting
Milling Quality
Several factors during rice production can affect
milling quality. Such factors are generally manifested
as individual kernel strength reduction, which
ultimately determines the ability of the kernel to
withstand the rigors of hulling and bran removal
without breaking apart. Diseases such as rice blast or
sheath blight can cause milling quality reductions
(Candole et al., 2000). In addition, kernel smut
disease reduces milling quality and can sufficiently
discolor rough rice to create problems during parboiling
(R. Cartwright, personal communication).
Additionally, field insects can have detrimental effects
on rice quality. Most notable is the stink bug, which
bores into the kernel during development, resulting
in a black spot on the kernel known as “peck.”