Anais da Sociedade Entomológica do Brasil (1997) 26, 371-374

Gláucia M.B. Ambrosano, Toshio Igue and André L. Lourenção (1997)
Determinação do Número de Ínstares de Insetos Utilizando Modelo de Regressão Segmentado
[Using step-wise regression in determining instar numbers of insects]
Anais da Sociedade Entomológica do Brasil 26 (2), 371-374
Abstract: Data from populations of Anticarsia gemmatalis Hübner larvae, and simulated data considering fixed and variable proportions of larvae head capsules sizes of successive instars, were fit into a segmented polynomial regression. The joint points corresponded to the change of instars and the larvae growing process was represented by a sequence of submodels. This allowed the accurate estimation of the mean size of larvae head capsule, and the confidence interval for each instar.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): André Luiz Lourencao

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Anticarsia gemmatalis