Biological studies of Chilo partellus (Lepidoptera: Crambidae) on natural diet under laboratory conditions
Paper Details
Biological studies of Chilo partellus (Lepidoptera: Crambidae) on natural diet under laboratory conditions
Abstract
Chilo partellus is one of the most devastating species of maize. Due to its faster rate of development and extent of damage a study was designed to get useful data about all the life stages of maize stem borer from egg to adult including eggs hatchability percentage, mean developmental period, mean body length and adult emergence under laboratory conditions on natural maize diet at a temperature of 26±2 °C and 65±5 % humidity in Insect Pest Management Program, National Agricultural Research Center (NARC) Islamabad. Eggs hatchability percentage was 87.50± 1.97%. Mean development period of egg was 5.2 ± 0.56 days and for 1st, 2nd, 3rd, 4th and 5th instar larvae was 5.25± 0.57, 4.87± 0.61, 3.56± 0.62, 3.87± 0.95 and 4.37± 1.20 days, respectively. Development was slow in early instars but the rate became faster in the later instars. The mean development duration of pre-pupae and pupae was 2.25 ± 0.77 and 7.5 ± 0.96 days, respectively. The larval stage lasted for 21-23 days, pupal stage took 6-9 days until adult emergence. Mean longevity for females was 2.87± 0.99 and for males was 2.75± 0.7 days. The study showed that C. partellus took 36-41 days with a mean value of 37.75 ± 1.98 to complete its life cycle showing its faster rate of development on natural diet under laboratory conditions.
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