A Laboratory Rearing Technique for the White-Fringed Beetle12

Bass, Max H.; Barnes, E. E.

doi:10.1093/jee/62.6.1512

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“…After 8 months under the latter conditions 63% of eggs hatched when they were returned to 26.6°C and flooded with water. Under normal conditions, with free water available, the mean time to hatch was 21 days (Bass & Barnes, 1969). Thus the 22-28 days old eggs stored by Gross et al (1972) must have contained fully developed larvae which remained quiescent in the egg shells until flooded, the resting stage being the larva rather than the egg.…”

Section: Significance Of the Non-feeding First Instarmentioning

confidence: 99%

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Development of larvae of the whitefringed weevil,Graphognathus leucoloma(Coleoptera: Curculionidae), in northern Queensland

Gough

Brown

1991

Bull. Entomol. Res.

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Growth of larvae of the whitefringed weevil, Graphognathus leucoloma (Boheman), was studied in the laboratory and on various crops in pots in a shadehouse at Kairi, on the Atherton Tableland in north Queensland. In the laboratory at 25.5 ± 1°C there were 11 instars for which head capsule widths and weights were recorded. The first instar weighed 0.14 mg. This was a nonfeeding stage capable of prolonged survival, and after 10 weeks in soil without food 60% survived. When provided with carrot (Daucus carota) larvae grew to 2 or 3 mg after 6 to 7 weeks, then increased rapidly in weight reaching 140 mg after 120 days. At 25.5°C the average time from first instar to adult was 311 days, due in part to a long prepupal period. Larval growth was measured on the roots of peanut (Arachis hypogaea) plants in pots in summer and winter. Under summer conditions (mean soil temperature 23.3°C) larvae reached 140 mg in about 120 days, similar to that in the laboratory on carrot. These fully grown larvae remained in the pots over the mild winter without pupating. Larvae developing in autumn/winter grew more slowly, but the fully grown larvae were then exposed to high spring (early summer) temperatures and soon pupated, the average time from first instar to adult being 273 days. The indications are that temperatures above 25°C quickly precondition mature larvae from Tolga for pupation, thus explaining the broad timing of adult emergence in the field in north Queensland. On different plants common near Tolga, larvae grew most quickly on peanuts and on the pasture legumes dolichos (Lablab purpureus) and stylosanthes (Stylosanthes guianensis). Survival on maize equalled that on peanuts (46.5% in sterilized soil) but growth was less. Larval survival and growth on the grass crowsfoot (Eleusine indica), and (surprisingly) on the pasture legume glycine (Neonotonia wightii) was very poor.

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Section: Significance Of the Non-feeding First Instarmentioning

confidence: 99%

“…Larval growth has not been examined accurately in the laboratory. Bass & Barnes (1969) developed a laboratory rearing technique and briefly commented on larval development. De Jaeger et ah, (1989) determined the number of instars from field collected larvae but their results differ from ours.…”

Section: Introductionmentioning

confidence: 99%

Development of larvae of the whitefringed weevil,Graphognathus leucoloma(Coleoptera: Curculionidae), in northern Queensland

Gough

Brown

1991

Bull. Entomol. Res.

View full text Add to dashboard Cite

show abstract

A Laboratory Rearing Technique for the White-Fringed Beetle12

Cited by 1 publication

References 0 publications

Development of larvae of the whitefringed weevil,Graphognathus leucoloma(Coleoptera: Curculionidae), in northern Queensland

Development of larvae of the whitefringed weevil,Graphognathus leucoloma(Coleoptera: Curculionidae), in northern Queensland

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