%0 Journal Article %T Impact of Variegated Temperature, CO<SUB>2</SUB> and Relative Humidity on Survival and Development of Beet Armyworm <i>Spodoptera exigua</i> (Hubner) under Controlled Growth Chamber %A Jagdish Jaba %A Suraj Prashad Mishra %A Naveen Arora %A Rajendra Munghate %J American Journal of Climate Change %P 357-370 %@ 2167-9509 %D 2020 %I Scientific Research Publishing %R 10.4236/ajcc.2020.94022 %X Climate change will have a noteworthy bearing on survival, development, and population dynamics of insect pests. Therefore, we contemplated the survival and development of beet army worm, Spodoptera exigua under different temperatures, (15°C, 25°C, 35°C, and 45°C), CO₂ (350, 550, 750 ppm) and relative humidity (55%, 65%, 75% and 85%) regimes. Maximum larval and pupal weights were recorded in insects reared at 25°C. The growth of S. exigua was faster at 35°C (larval period 7.4 days and pupal period 4.5 days) than at lower temperatures. At 15°C, the larval period was extended for 61.4 days and there was no adult emergence from the pupae till 90 days. The S. exigua hatchling was absent at 45°C. The larval survival ranged from 31.6% - 57.2%, maximum survival was recorded at 25°C, and minimum at 45°C. The maximum (84.27%) and minimum adult emergence were recorded in insects reared at 25°C and 35°C respectively. Maximum fecundity (384.3 eggs/female) and egg viability (51.97%) were recorded in insects reared at 25°C. Larval and pupal periods increased with an increase in CO₂ concentration. The highest pupal weights (128.6 mg/larva) were recorded at 550 ppm. The highest larval survival (73.50%) was recorded at 550 ppm and minimum (37.00%) at 750 ppm CO₂. Fecundity was the highest in insects reared at 550 ppm CO₂ (657.4 eggs/female), and the lowest at 750 ppm. Maximum larval and pupal weights were recorded in insects reared at 75% relative humidity (RH). The growth rate of S. exigua was faster at 85% RH than at lower RH. The larval survival ranged between 40.0% - 58.5%. Maximum adult emergence (88.91%) was recorded in insects reared at 75% RH and minimum at 85% RH. Maximum fecundity (447.6 eggs/female) and the highest egg viability (72.95%) were recorded in insects reared at 75% and 65% RH respectively. Elevated %K < %K i> %K Spodoptera exigua< %K /i> %K Temperature %K CO< %K SUB> %K 2< %K /SUB> %K Relative Humidity and Climate Change %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=104283