Adult morphology and life cycle under constant temperatures of the predator Rhyzobius lophanthae Blaisdell (Col., Coccinellidae)

Adult morphology and life cycle under constant temperatures of the predator Rhyzobius lophanthae Blaisdell (Col., Coccinellidae)

The external and internal morphological characteristics of the predator Rhyzobius lophanthae Blaisdell (Coleoptera, Coccinellidae) were studied. The head, antenna, thorax elytra, hind wings, legs and abdomen are described. The adult has an average length of about 2.5 mm and width of 1.8 mm. The flag...

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Bibliographic Details
Published in:Journal of pest science Vol. 75; no. 4; pp. 105 - 109
Main Authors: Stathas, G J, Eliopoulos, P A, Kontodimas, D C, Th, Siamos D
Format: Journal Article
Language:English
Published: Heidelberg Springer Nature B.V 01-08-2002
Subjects:
Antennas
Central nervous system
Coccinellidae
Elytra
Embryos
Females
Flagella
Follicles
Gastrointestinal tract
Instars
Leg
Life cycles
Morphology
Ovaries
Ovarioles
Physical characteristics
Pupae
Reproductive system
Rhyzobius lophanthae
Setae
Thorax
Wings
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Description
Summary:The external and internal morphological characteristics of the predator Rhyzobius lophanthae Blaisdell (Coleoptera, Coccinellidae) were studied. The head, antenna, thorax elytra, hind wings, legs and abdomen are described. The adult has an average length of about 2.5 mm and width of 1.8 mm. The flagellum of the antenna consists of 9 segments. The whole surface of thorax and elytra is covered by setae. The tarsus of the 3 legs is 3-segmented. An external morphological difference between male and female is the outline of the 5th sternite. The alimentary canal, the central nervous system, and the reproductive system of both male and female are also described. The testes consist of 10 follicles and the ovaries of 10 ovarioles. The life cycle of R. lophanthae was studied by rearing the predator on the diaspidid Chrysomphalus aonidum (Linnaeus). The duration of the development of the embryo, 1st, 2nd, 3rd, 4th larval instars, pupa and preoviposition period of adults were measured at 15, 20, 25 and 30 °C.
ISSN:1612-4758
1612-4766
DOI:10.1034/j.1399-5448.2002.02033.x