Factors Affecting Ovipositional Behaviour of Scutellista cyanea, an Egg-parasitoid of Hemispherical Scale

Ibrahim, Abdul Ghani (1984) Factors Affecting Ovipositional Behaviour of Scutellista cyanea, an Egg-parasitoid of Hemispherical Scale. Pertanika, 7 (3). pp. 49-52.

[img] PDF
2557Kb

Abstract

Scutellista cyanea Motschulsky is an egg parasitoid of many coccids, including the hemispherical scale, Saissetia coffeae. The adult female parasitoid oviposits in gravid scale, S. coffeae. Ambient temperature influences the number of eggs deposited and adult longevity of the parasitoid. The life-spcm of the adult parasitoid was found to be reduced with an increase in temperature; at 200 C longevity it was 80.0 days while at 28°C it was only 30 days. On the other hand, an increase in temperature within limits would increase the total number of eggs deposited by the parasitoid. In a comparison of two sizes of host-scale i.e. scale >3.5mm in length and <2.5mm in length, the result showed that significantly (p<0.05) greater parasitoid progency emerged from host scale of >3.5mm in length. The relationship between head width and adult longevity and between head width and egg production are r=0.90 and r=0.93.

Item Type:Article
Keyword:Scutellista cyanea, Saissetia coffeae egg- parasitoid oviposition, adult longevity
Faculty or Institute:Faculty of Agriculture
ID Code:2254
Deposited By: Nur Izyan Mohd Zaki
Deposited On:12 Nov 2009 01:36
Last Modified:27 May 2013 06:59

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 12 Nov 2009 01:36.

View statistics for "Factors Affecting Ovipositional Behaviour of Scutellista cyanea, an Egg-parasitoid of Hemispherical Scale"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.