EFFECT OF TEMPERATURE ON BIOLOGICAL PARAMETERS OF IMMATURE STAGES OF CHRYSOPERLA CARNEA (NEUROPTERA: CHRYSOPIDAE) FEEDING ON RICE MEAL MOTH, CORCYRA CEPHALONICA EGGS
Javed Khan, Ehsan-ul-Haq, Naheed Akhtar, Waseem Ahmad Gillani*, Naila Assad**, M.Asif Masood and Irum Raza*
ABSTRACT
Developmental durations of immature stages of Chrysoperla carnea, feeding on Corcyra cephalonica eggs at three constant temperatures 24 ±1 ºC, 28 ±1 ºC and 32 ±1 °C were studied. The results indicated that incubation period was 4.9±0.08, 3.8±0.08 and 3.0±0.06 days at three temperatures, respectively. Developmental duration of first instar were 3.6±0.07, 3.0±0.11, 2.0±0.06 days, second instar were 3.4±0.11, 3.0±0.07, 2.8±0.07 and third instars were, 4.9±0.10, 4.0±0.06, 3.4±0.13 days at three temperatures, respectively. The larval developmental duration were 11.9±0.13, 9.7±0.31, 8.2±0.14 and pupal duration were 9.2±0.10, 8.3±0.10 and 6.8±0.07 days at three temperatures respectively. Biological cycle of immature stages were 26.0±0.13, 21.8 ±0.08 and 18.0±0.56 days, respectively with total survival rate from egg to adult emergence of 82%, 68% and 42% at the respective temperature. The results indicate that developmental cycle of immature stages were significantly different at three different temperatures and with increasing temperature the developmental cycle decrease significantly.
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