Effect of Different Constant Temperature on the Life Cycle of a Fly of Forensic Importance Lucilia cuprina

Abstract

Lucilia cuprina is one of the forensically important Calliphoridae fly. L. cuprina is a helpful resource at the crime scenes as well as a nuisance to sheep. It is known to be one of the first flies to occupy a corpse upon its death. Due to this, it has great importance in forensic field to find out post-mortem interval. In this study, the development of L. cuprina is studied in an incubator at different constant temperatures. Larvae of the L. cuprina were reared in an incubator at 20 º C, 25 º C, 30 º C, 35 º C, and 40 º C. During study the developmental data, temperature and relative humidity of the rearing room as well as weight, length of the larvae were recorded from the time the larvae were collected until the adult flies emerge out.Results obtained show that development of the L. cuprina was slow at lower temperature. At the high temperature, developmental rate was fast. At low temperature L. cuprina attained greatest body weight whereas at high temperature there was a decrease in the weight. When flies were reared at 40 º C the development of the fly was much more rapid but slight mortality was observed. Above study shows that temperature plays a very important role in the development of L. cuprina. For the correct estimation of post-mortem interval this study is very useful, because each dipteran fly has its own developmental period with respect to temperature and region.

Comparative Study on Forensic Insects encountered on Rabbit Corpses killed with different methods in Upper Egypt

“…Also Lucilia maggots were recorded negatively correlated with temperature and positively with humidity. This result is disagreed with Bansode et al, (2016) who found that the development rate of the L. cuprina was slow at low temperature and fast at high temperature.…”

Temperature requirements for the growth of immature stages of blowflies species, Chrysomya albiceps and Calliphora vicina, (Diptera:Calliphoridae) under laboratory conditions

“…Studies have shown that insect development is directly related to environmental data such as temperature and humidity. Degree day model using development data of necrophagous insect on the carcass particularly first colonizers and environmental data such as temperature can be estimate the time of death (Kumara et al, 2017;Bansode et al, 2016;Chua, 2013). As a microhabitat, the corpse is used differently by the insects that colonize the body.…”

Seasonal Monumental Insects Accompanying Euphrates Poplar Leaves

“…and humidity during the seasonal presence of the insect, it has been shown from Table (6) that the average temperatures ranged between 7.11-13.8oM and relative humidity be-tween 51.43-61.14 / R.H, The highest average insect density in the period from the first week of December 2018 to the fourth week of January 2019 was 38.25 insects recorded in the first week of December, an average temperature of 13.8o C and relative humidity 51.43%.Where, no insect infection was recorded in most of the readings in January for the second compatibility with the average temperature ranged from 7.11-8.76 C°, so it was found from the correlation that it was a high positive between the mean temperature and the average insect population density of (0.841) at a significant level p>0.0001 Where the correlation between humidity and insect density was negative (0.41-), and this is consistent with what [2] mentioned about the existence of a moral relationship be-tween preparing an insect from poplar leaves Chaitophorus eupharticus, temperature and significant, with relative humidity. Seventh: Seasonal presence of Cypsonoma hapalosarea in the autumn season 2018-2019: The symptoms of this insect appeared in very few numbers in the third week of December 2018, where in Table (7), with an average of 0.33 insects on both the northern and eastern sides, and rose in the first week of January 2019, with averages of 0.67 insects on both the northern and southern sides Eastern and the highest infection on the southern side showed an average of 1.0 insects in the second week of January. It appears from Table (7) that the highest average was 0.29 insects on the northern side and with a total of (7) insects and that the highest average recorded in the first week of January for the second with an average of (0.59) and a total of 7 insects.…”

“…Seventh: Seasonal presence of Cypsonoma hapalosarea in the autumn season 2018-2019: The symptoms of this insect appeared in very few numbers in the third week of December 2018, where in Table (7), with an average of 0.33 insects on both the northern and eastern sides, and rose in the first week of January 2019, with averages of 0.67 insects on both the northern and southern sides Eastern and the highest infection on the southern side showed an average of 1.0 insects in the second week of January. It appears from Table (7) that the highest average was 0.29 insects on the northern side and with a total of (7) insects and that the highest average recorded in the first week of January for the second with an average of (0.59) and a total of 7 insects.…”

“…Under the bark of trees and fallen leaves for a period of 4 months, the adult female lays between (27 -40) eggs and that the nymph has 5 ages and the insect has one generation per year [5], it insects Chaitophorus sp. In Iraq, black and white and American nymphs absorb their sap from the lower surfaces of modern leaves and lead to wrinkling and wrapping of the leaves of poplar trees, then their yellowing and drying [6], Also, the insect of the Cypsonoma hapalosarea poplar bond, which belongs to the leaf-winged family and the Tortricidae family, infects the trees of Populus euphratica, which connect two or more leaves and feed on the skin of the leaf within the bound portion [6] as indicated by [7].…”