Development of Rhodnius prolixus (Hemiptera: Reduviidae) under constant and cyclic conditions of temperature and humidity
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1999-06
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Development of Rhodnius prolixus after eclosion until the adult stage was studied at constant tem-
peratures (T), 15, 20, 25, 28, 35°C, and relative humidities (RH), 75, 86 and 97%, and fluctuating (16/
8 hr) temperatures, T I/II, 15/28°C, 20/25°C, 25/28°C and 25/35°C, and relative humidities, RH I/II, 86/
75% and 97/75%. Eclosion or molting were not observed at 15°C and 86 or 97% RH, respectively. At
35°C and 75% RH only few insects molted. By alternating T I/II, 15/28°C and 25/35°C, insects devel-
oped at high frequency. Cumulating the average lengths of the interphases within independent groups
for each instar, R. prolixus reached the adult stage most rapidly (86.7 days) and at highest frequency per
instar (mean: 91.8%) at 28°C and 75% RH. Under fluctuating T I/II, development was completed within
100 days or less at 25/28°C and 25/35°C with high rates of hatch and molting. Development was slowest
at fluctuating TI/II, 15/28°C and 20/25°C (>185 days), and at constant 20°C (>300 days). Mortality
was higher at constant 97% RH or fluctuating RH I, 97%, than at constant or fluctuating 86% RH.
Refeeding was minimal at optimal conditions of T and RH for development. The most refeeding was
observed at a constant 35°C.
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Rhodnius prolixus, Humidity, Development, Temperature
Citação
LUZ, Christian; FARGUES, Jacques; GRUNEWALD, Jörg. Development of Rhodnius prolixus (Hemiptera: Reduviidae) under constant and cyclic conditions of temperature and humidity. Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 94, n. 3, p. 403-409, May/June 1999.