University of Khartoum

Biology and feeding behaviour of Ischiodon aegyptius (Wied)(Diptera: Syrphidae) and Coccinella undecimpunctata (L) (Coleoptera: Coccinellidae) Under Laboratory condition

Biology and feeding behaviour of Ischiodon aegyptius (Wied)(Diptera: Syrphidae) and Coccinella undecimpunctata (L) (Coleoptera: Coccinellidae) Under Laboratory condition

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Title: Biology and feeding behaviour of Ischiodon aegyptius (Wied)(Diptera: Syrphidae) and Coccinella undecimpunctata (L) (Coleoptera: Coccinellidae) Under Laboratory condition
Author: Malik, Sir Elkhatim Elbadwi Ismail
Abstract: The laboratory trials were carried out at Shambat area (20 km north of Khartoum) to study the biology and feeding behaviour of the predators Syrphid fly Ischiodon acgyptius (Wied) (Diptera, syrphidae), and the Ladybird beetle Conccinella undecimpunctata (L.). This was done during the period from January to March 2005, the mean temperature and mean relative humidity were (22.4 ± 1.4 – 29.2 ± 1.4°C and 41.3 ± 4.4 – 54.4 ± 3.4%). Laboratory investigations on the biology of the predators Syrphid fly Ischiodon aegyptius (Wied) and Coccinella undecimpuncata (L.) reared on Melanaphis sacchari (Zhnt) showed that the duration from egg laying to adult emergence was 11.2, and 10.2 days for I. aegyptius (Wied) and C. undecimpunctata (L), respectively (mean of two generations). The egg incubation period was 1.2 ± 0.41 days, the larval period was 5 days, the pupal period was 5 days, for the Syrphid fly I. aegyptius (Wied). The total average of Melanaphis sacchari (Zhnt) consumed per day for the different larval instars were, 13 ± 1.66, 40 ± 1.18 and 86 ± 1.41 aphid for the first, second and the third instar respectively and the percentage of hatchability was 61.2 ± 0.86%. The egg incubation period was, 2.5 ± 0.80 days, the larval period was 4 days, the pre-pupal period was 1 day, the pupal period was 2.7 ± 0.45 days for the ladybird beetle C. undecimpunctata (L.) and the percentage of hatchability was 82.5 ± 2.5%. The total average of M. sacchari (Zhnt) consumed per day for the different larval instars, adult male and female of C. undecimpunctata (L.) were found to be 6.8 ± 0.87, 9.2 ± 74, 22.6 ± 2.90, 44.6 ± 2.48, 46.6 ± 2.83 and 49.4 ± 3.55 aphid for thr 1st, 2nd, 3rd, 4th, adult male and female respectively. Cannibalism phenomenon was observed during the study on C. undecimpunctata (L.) in the larval stages particularly in the late instars and the adult females, the female was found to eat their own eggs under shortage of food, and the proportion of cannibalized eggs by adult female of C. unecimpunctata (L.) was 96%.
Description: 69 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/11793
Date: 2015-06-14


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