• Home
  • Browse
    • Current Issue
    • By Issue
    • By Author
    • By Subject
    • Author Index
    • Keyword Index
  • Journal Info
    • About Journal
    • Aims and Scope
    • Editorial Board
    • Publication Ethics
    • Peer Review Process
  • Guide for Authors
  • Submit Manuscript
  • Contact Us
 
  • Login
  • Register
Home Articles List Article Information
  • Save Records
  • |
  • Printable Version
  • |
  • Recommend
  • |
  • How to cite Export to
    RIS EndNote BibTeX APA MLA Harvard Vancouver
  • |
  • Share Share
    CiteULike Mendeley Facebook Google LinkedIn Twitter
Journal of Plant Protection and Pathology
arrow Articles in Press
arrow Current Issue
Journal Archive
Volume Volume 16 (2025)
Volume Volume 15 (2024)
Volume Volume 14 (2023)
Volume Volume 13 (2022)
Volume Volume 12 (2021)
Volume Volume 11 (2020)
Volume Volume 10 (2019)
Volume Volume 9 (2018)
Volume Volume 8 (2017)
Volume Volume 7 (2016)
Issue Issue 12
Issue Issue 11
Issue Issue 10
Issue Issue 9
Issue Issue 8
Issue Issue 7
Issue Issue 6
Issue Issue 5
Issue Issue 4
Issue Issue 3
Issue Issue 2
Issue Issue 1
Volume Volume 6 (2015)
Volume Volume 5 (2014)
Volume Volume 4 (2013)
Volume Volume 3 (2012)
Volume Volume 2 (2011)
Volume Volume 1 (2010)
Volume Volume 34 (2009)
Volume Volume 33 (2008)
Volume Volume 32 (2007)
Volume Volume 31 (2006)
Volume Volume 30 (2005)
Volume Volume 29 (2004)
Volume Volume 28 (2003)
Volume Volume 27 (2002)
Volume Volume 26 (2001)
Volume Volume 25 (2000)
Adly, A., Ibrahim, A., Ahmed, A. (2016). THERMAL UNITS REQUIREMENTS FOR DEVELOPMENT OF THE AMERICAN BOLLWORM, Helicoverpa armigera (HUBNER.). Journal of Plant Protection and Pathology, 7(2), 115-122. doi: 10.21608/jppp.2016.50084
A. M. Adly; Amira Sh.M. Ibrahim; A. F. Ahmed. "THERMAL UNITS REQUIREMENTS FOR DEVELOPMENT OF THE AMERICAN BOLLWORM, Helicoverpa armigera (HUBNER.)". Journal of Plant Protection and Pathology, 7, 2, 2016, 115-122. doi: 10.21608/jppp.2016.50084
Adly, A., Ibrahim, A., Ahmed, A. (2016). 'THERMAL UNITS REQUIREMENTS FOR DEVELOPMENT OF THE AMERICAN BOLLWORM, Helicoverpa armigera (HUBNER.)', Journal of Plant Protection and Pathology, 7(2), pp. 115-122. doi: 10.21608/jppp.2016.50084
Adly, A., Ibrahim, A., Ahmed, A. THERMAL UNITS REQUIREMENTS FOR DEVELOPMENT OF THE AMERICAN BOLLWORM, Helicoverpa armigera (HUBNER.). Journal of Plant Protection and Pathology, 2016; 7(2): 115-122. doi: 10.21608/jppp.2016.50084

THERMAL UNITS REQUIREMENTS FOR DEVELOPMENT OF THE AMERICAN BOLLWORM, Helicoverpa armigera (HUBNER.)

Article 4, Volume 7, Issue 2, February 2016, Page 115-122  XML PDF (529.32 K)
Document Type: Original Article
DOI: 10.21608/jppp.2016.50084
View on SCiNiTO View on SCiNiTO
Authors
A. M. Adly1; Amira Sh.M. Ibrahim2; A. F. Ahmed1
1Plant Protection Research Institute, Agricultural Research Center ,Giza
2Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, Egypt
Abstract
The present study was carried out under four constant temperatures of 20, 23, 26 and 29oC each ± 1 when the American bollworm, Helicoverpa armigera (Hubner) larvae were fed on the Lettuce vegetable leaves, Lactuca sativa L. The time required for embryogenesis, larval duration and pupal duration as well as pre- and post-oviposition periods decreased as the temperatures increased from 20 to 29oC. The lower threshold of development (to) were12.56, 11.09, 11.23 and 9.99oC for incubation period, larvae, pupae and pre- oviposition period, respectively. The average accumulated thermal units required for development of the different stages was 43.05, 255.66, 231.29 and 9.99 degree-days for incubation period, larvae, pupae and pre-oviposition period; respectively. The lower threshold of development (to) to complete a generation was 10.92oC. The average accumulated thermal units required for a generation was 589.62 degree-days. The thermal units required to complete the development of different stages and completion one generation, as well as helping in the design of development indexes, determining the time required for these stages under fluctuating temperatures in field and forecasting system for establishing and develop the non chemical methods for controlling using the Helicoverpa armigera IPM program.
Statistics
Article View: 199
PDF Download: 460
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Journal Management System. Designed by NotionWave.