Abstract
The insect pests of rice were found for a specific duration throughout the year, however, dominancy of insects was
comparatively higher from mid-March to May and from August to mid-October, in case of White Stem Borer and Yellow
Stem Borer during both the years, 2009 and 2010; while from September to start of April of next year in case of Pink Stem
Borer. On comparing the weather parameters, importantly temperature and humidity, it was evident that the insect trap was
recorded higher within specific range of temperature that varies from 18 to 35°C in case of White and Yellow Stem Borers,
and shows significant relationship with total insect catch. Maximum traps were observed during April where average
temperature was 30-33°C, considering it optimal temperature for insect catch by light traps. However, in case of Pink Stem
Borer, insect trap was found to occur below 32°C during all winter season. Association analysis of temperature with insect
catch clearly accentuates the strong relationship of activity of these insects with environmental temperature. At the same
time, it was also discovered that this relationship is within specific temperature range, i.e. between upper and lower threshold
of activity, below and above of this range, temperature conferred no effect on activity of these insects.
