الفهرس 
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Abstract
Among the rice insecta, stem borer has
been the major insect pest all along in the
traditional rice growing regions of the world.
Of the 20 different species of stem borer ,
striped, (Chilo suppressalis), yellow (Trypor,
yza incerulEts), white (T. innotata) and pink
(Sesamia inferens) are the major ones.
Striped borer is estimated to cause yield
losses ranging from 3 to 95% (Ghose 21 ~.
1960).
Differences in host plant resistance to
the insect pests in general is known over 100
years. Nevertheless, varieties combining a
desired level of resistance to the pests were
bred and released for general cultivations
since only 1940 (Painter, 1951). Studies carried
out since then to understand kind and level
of resistance revealed the existence of three
categories namely non-preference (unattractive
to the pest for oviposition, feeding and shelter),
antibiosis (phenomenon of adverse feeding
effects on the growth and survival of larvae
and fecundity of the pest)