Abstract:
ITilaparyata lup.SiQS (Stal) and Nephotettix vires cons
(Horv ) are the two major rice pest in Bangladesh, Temperature
response of these two species was studied in the laboratory.
The f avourable range of temperature for preoviposition
period was 30®C-l+0®C for both the species. The incubation
and developmental period was found to be shortest at i+0®C.
The maximum and minimum adult longevity ware at 2?®C and
1+0°C respectively. The maximum hatchability was observed
at 30°C and minimum at 20®C in both the species. The maximum
survival!ty from egg to adult stage was found in 30°C in
21. lumens and 2?®C in
virescens. The duration of the
larval periods were 30 days at 20°C in 2J. virescens and 31
days in £[• lunens at the same temperature. The egg viability
was maximum in 25°C to 3°°C and minimum at 20®C, The time
required for hatching of eggs of both the species was almost
same. At 10 and b5°G the development of eggs and larvae did
not occur. The time required for development of eggs and
larvae was more at fluctuating temperature than the constant
temperature
