Predicting Emergence in a Midwestern Population of Cotinis nitida (Coleoptera: Scarabaeidae): An Update

1. For species of insects that deposit their eggs on foliage, as Leptinotarsa decemlineata, Crioceris asparagi, and Anasa tristis, the rates of metabolism as measured by the CO2 output or the oxygen intake indicate, during embryonic development, a short formative period, followed by a very active extended growth. Those species that deposit their eggs in the soil, as Cotinis nitida and Popillia japonica, show that the formative period is greatly extended and the growth period similarly lengthened. 2. It has been shown from metabolism experiments that intensive histolysis occurs during the prepupal period and becomes less intensive during pupal development. 3. Metabolism experiments show a greater amount of energy change during embryonic development as compared to the energy developed during metamorphosis. This is shown by the greater CO2 output and by the oxygen intake. 4. Low respiratory quotients, varying from 0.42 to 0.71, have been obtained during the embryonic and pupal development of insects, resembling similar low quotients obtained with hibernating forms. 5. Changes from a neutral to an acid reaction (pH 6.8 to 5.9) have been observed to take place in some species during prepupal and early pupal development. As metamorphosis is completed a converse change occurs (pH 5.9 to 6.8). Changes in pH from an acid to neutral reaction were also observed to take place in some species, as Cotinis nitida and Hylemyia cilicrura, during embryonic development.

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Development of a Yeast Flora in The Adult Green June Beetle (Cotinis Nitida, Scarabaeidae)

Mycologia ◽

10.1080/00275514.1990.12025910 ◽

1990 ◽

Vol 82 (4) ◽

pp. 471-479 ◽

Cited By ~ 6

Author(s):

H. S. Vishniac ◽

D. T. Johnson

Keyword(s):

Yeast Flora ◽

Green June Beetle ◽

Cotinis Nitida

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EVIDENCE OF A SEX PHEROMONE IN THE GREEN JUNE BEETLE, COTINIS NITIDA (COLEOPTERA: SCARABAEIDAE)1

Journal of Entomological Science ◽

10.18474/0749-8004-22.3.264 ◽

1987 ◽

Vol 22 (3) ◽

pp. 264-267 ◽

Cited By ~ 16

Author(s):

J. M. Domek ◽

D. T. Johnson

Keyword(s):

Sex Pheromone ◽

Trap Catch ◽

Green June Beetle ◽

Trap Placement ◽

Range Test ◽

Cotinis Nitida

A trapping study was conducted in an area of heavy green June beetle (GJB), Cotinis nitida (L.) (Coleoptera: Scarabaeidae), emergence to collect evidence in support of the hypothesis that unmated females attract males with a sex pheromone. Yellow-painted baffle and funnel traps, baited with unmated females, mated females, unmated males or no beetles (control), were arranged in a Latin-cube design and randomized daily for four consecutive days. Trap catch was not significantly affected by trap placement (row or column) or time. Significantly more male beetles were caught in traps baited with unmated females than in any other treatments (P = 0.05, Duncan's multiple range test).

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