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

Autor:	G. R. Allen, Vinu S Patel, Helen F. Nahrung
Rok vydání:	2004
Předmět:	biology Phenology Ecology Field data Population ecology biology.organism_classification Lower temperature Degree (temperature) Animal science Insect Science Eucalyptus nitens PEST analysis Agronomy and Crop Science Ecology Evolution Behavior and Systematics Field conditions
Zdroj:	Australian Journal of Entomology. 43:177-183
ISSN:	1440-6055 1326-6756
DOI:	10.1111/j.1440-6055.2004.00397.x
Popis:	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.
Databáze:	OpenAIRE
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