| dc.contributor.advisor | Md. Abdul Ahad | |
| dc.contributor.author | Islam, Md. Hakikul | |
| dc.date.accessioned | 2022-04-21T04:39:03Z | |
| dc.date.available | 2022-04-21T04:39:03Z | |
| dc.date.issued | 2007-05 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/358 | |
| dc.description | The lady beetle Menochilus sexmaculatus (Fab.) is commonly known as lady bird
beetle is a predacious coccinellid insect recorded earlier as Cheilomenes
sexmaculata (Alam et al 1964). The beetles got their name from the middle ages,
when they were thought to have super-natural powers, and were dedicated to the
virgin Mary: Beetles of our lady. Beetles are by far the largest order of the insecta
with more than one quarter million described species. This species are divided by
authorities into more than 100 families and 4 sub-orders (Pedigo 2004). The
coccinellid beetle belongs to the family conccinellidae. Coccinellidae means
“Clothed in scarlet” of the order Coleoptera and comprise nearly about 5000
species (Imms 1977). | en_US |
| dc.description.abstract | This study conducted the biology, morphological characteristics and predation
efficiency of lady beetle Menochilus sexmaculatus. The mean pre-oviposition period
of the beetle was observed 3.9 days, while the oviposition period was 21.5 days.
Female beetles laid on an average 387.4 eggs and the hatching rate was recorded
94.8%. The average incubation period was found 3.1 days and the duration of the
larval period 8.2 days. The pre-pupal and pupal periods were recorded 1.5 and 3.5
days, respectively. However, mean longevity of male and female beetles were 32.3
and 34.2 days, respectively. The length of the egg was 1.2 mm and the breadth was
0.6 mm. The 1%, 2" 3" and the 4" instar larvae were 1.6, 3.6, 5.1 and 5.4 mm in
length, while their breadths were 0.7, 1.1, 1.3, and 1.4 mm, respectively. The average
lengths of the male and female pupae were 4.7 and 5.7 mm, and breadths were 1.9 and
2.1 mm, respectively. Length and breadth of adult male beetles were 5.1 and 2.5 mm,
whereas the female lady beetles were 5.5 and 2.0 mm, respectively. The data of the
predation efficiency of the beetles reveal that the larvae of the 4" instar showed
significantly the highest performances and the 1“ instar showed the lowest. Female
beetles were more effective in aphid predation in comparison to male beetles.
Therefore, the results show a significant role of predation efficiency of M.
sexmaculatus on bean aphid. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR. | en_US |
| dc.subject | Pre-oviposition, oviposition and incubation period | en_US |
| dc.subject | Pre-pupation and pupation period | en_US |
| dc.subject | Mating behavior of lady beetle... | en_US |
| dc.title | Biology and predation efficiency of Menochilus sexmaculatus (Fab.) | en_US |
| dc.type | Thesis | en_US |
