| dc.contributor.advisor | Md .Abdul Ahad | |
| dc.contributor.author | Chowdhury, Subrata Paul | |
| dc.date.accessioned | 2022-04-23T07:37:28Z | |
| dc.date.available | 2022-04-23T07:37:28Z | |
| dc.date.issued | 2007-11 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/631 | |
| dc.description | The lady bird beetles have been associated with good fortune in many myths
and legends. They have been honoured through the centuries as they vernacular
indicates that the term ‘Lady’ is in reference to biblical Mother Mary (Roache,
1960). The coccinellids, commonly known as lady bird beetles and have been
known worldwide as a predator of a number of insects. They are distributed in many
countries of Asia, including Bangladesh (Islam & Nasiruddin, 1978). Lady beetles,
often called ladybug or coccinellids. They are the most commonly known of all
beneficial insects. In Europe these beetles are called ladybirds (William, 2002).
Islam and Nasiruddin (1978) reported that Verania discolor (Fab.) had been
recorded as Micraspis discolor (Fab.). Beetles are divided by the authorities into
more than 100 families and 4 sub-orders (Pedigo, 2004). The coccinellid beetle
belongs to the family coccinellidae. Coccinellidae means “Clothed in scarlet” and
comprise nearly about 5000 species (Imms, 1997). | en_US |
| dc.description.abstract | The experiment was conducted at the Department of Entomology, Hajee
Mohammad Danesh Science and Technology University, Dinajpur. The mean preoviposition period of the beetle Micraspis discolor was 5.1+0.48 days and the
oviposition period was 40.10 +0.46 days. The female beetles laid on an average
235.50£7.96 eggs and the hatching % was 83.93 +2.11. The average incubation
period was 3.1+ 0.22 days and the duration of total the larval period from egg to
adult was 10.76 +1.35 days. The pre-pupal and pupal periods were 1.50 +0.20and
2.60+ 0.21days, respectively. The mean longevity of the male and the female beetles
were 40.20 +1.0 and 47.50 +0.82 days, respectively. The length of the egg was 1.2
+0.02 and the breadth was 0.5 +0.01mm. The 1°‘, 2™ , 3 and the 4" instar larvae
were 1.6 +0.05 , 3.13 +0.08 , 4.10 +0.16 and 5.1 +0.08 mm in length, while their
breadths were 0.62 +0.02 , 0.70 40.06, 1.1 +0.10 and 1.3 +0.09 mm respectively.
The average lengths of the male and female pupae were 3.1+0.08 and 3.3+0.09 mm
and the breadths were 2.10.05 and 2.5+0.08 mm, respectively. The length and the
breadth of the adult male and the female beetles were 4.1+0.06, 3.3 +0.08 3.7+0.05,
3.1 +0.06mm and mm respectively. Predation efficiency of 1°, 2", 3" and 4" instar
larvae were 1.9+0.20, 3.6+0.19, 4.4340.24 and 6.08+0.24 aphids, respectively,
while the predation efficiency of male and female adults were 1003.27+104.35 and
1216.40+ 22.89aphids. The data of the aphid predation of the beetles reveal that the
larvae of the 4" instar showed significantly the highest predation performances and
the 1° instar showed the lowest one. The female beetles were more effective in
aphid predation in compared to male beetles. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR. | en_US |
| dc.subject | lady bird beetle Micraspis discolor | en_US |
| dc.subject | Pre-oviposition period (days) of M. discolor. | en_US |
| dc.subject | Duration of different stages of M. discolor | en_US |
| dc.title | Biology and bean aphid predation efficiency of lady bird beetle Micraspis discolor (Fabricius) (Coleoptera : Coccinellidae) | en_US |
| dc.type | Thesis | en_US |
