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Day-degree development and phenology modelling of the immature stages of Chrysophtharta agricola (Chapuis) (Coleoptera: Chrysomelidae), a pest of eucalypt plantations

Citation

Nahrung, HF and Allen, GR and Patel, VS, Day-degree development and phenology modelling of the immature stages of Chrysophtharta agricola (Chapuis) (Coleoptera: Chrysomelidae), a pest of eucalypt plantations, Australian Journal of Entomology, 43 pp. 177-183. ISSN 1326-6756 (2004) [Refereed Article]

DOI: doi:10.1111/j.1440-6055.2004.00397.x

Abstract

Day-degree developmental requirements and lower temperature thresholds were determined in the laboratory for the immature lifestages and preoviposition periods of Chrysophtharta agricola, a pest of eucalypt plantations in Tasmania and Victoria. These data were used to provide a predictive model for C. agricola's spring-summer phenology under field conditions. The model was validated using field data from two Tasmanian field sites over three seasons. Lower temperature thresholds for immature development ranged from 2.8°C (Liv) to 10.3°C (Li), while the lower temperature threshold for oviposition was 7.4°C for teneral and overwintered adults. Total immature development time (egg-adult) was approximately 400 ± 16 DD above 8 ± 0.41°C. Development time did not differ between males and females, or between offspring of different females. Beetles reared at 25°C were significantly larger than those reared at low temperatures. Day-degree models were usually a good predictor of the appearance of developmental stages in the field.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Population Ecology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
Author:Nahrung, HF (Ms Helen Nahrung)
Author:Allen, GR (Associate Professor Geoff Allen)
Author:Patel, VS (Mr Vinu Patel)
ID Code:26833
Year Published:2004
Web of Science® Times Cited:9
Deposited By:Agricultural Science
Deposited On:2004-08-01
Last Modified:2011-09-23
Downloads:0

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