Open AccessDEVELOPMENT OF IMMATURE STAGES OF THE LUCERNE LEAFROLLER MEROPHYAS DIVULSANA (WALKER) (LEPIDOPTERA: TORTRICIDAE) UNDER CONSTANT TEMPERATURES AND ON SEVERAL LARVAL DIETS
Author(s) -
Allsopp P. G.,
Cowie B. A.,
Franzmann B. A.
Publication year - 1983
Publication title -
australian journal of entomology
Language(s) - English
Resource type - Journals
eISSN - 1440-6055
pISSN - 1326-6756
DOI - 10.1111/j.1440-6055.1983.tb02099.x
Subject(s) - lepidoptera genitalia , tortricidae , biology , pupa , larva , horticulture , agar , zoology , botany , genetics , bacteria
ABSTRACT Of 5 diets tested, 1 comprised principally of agar‐lucerne was judged better than an agar‐bean, non‐agar‐lucerne, potted lucerne or cut lucerne diet for larval and pupal development of M. divulsana. Development times of eggs, larvae and pupae were determined over a range of constant temperatures from 6.9 to 34.2 °C. All stages developed between 11.3 and 30.7 °C. Using thermal summation, the following threshold temperatures and thermal constants were calculated: eggs, 8.9 °C, 2010.5 h ° female larvae, 8.2 °C, 269.7 d° male larvae, 8.8 °C, 243.2 d ° female pupae, 8.0 °C, 97.1 d ° male pupae, 8.0 °C, 110.2 d °. The data were also fitted to Pradhan's and Stinner's formulae. All three development‐rate functions fit the data well (R 2 > 0.90).