|
Egyptian Cotton Leafworm Spodoptera littoralis Development on Artificial Diet
in Relation to Heat Units Requirements
- Hassan F. Dahi
- Plant Protection Research Institute, ARC, Dokki, Giza, Egypt.
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
The present work was carried out under four constant temperatures (i.e.20, 25, 30 and 35°C) when the Egyptian cotton leafworm Spodoptera littoralis (Boisd.) larvae, where fed on artificial diet. The time required for embryogensis, larval duration, pupal duration and adult longevity were decreased as the temperatures increased from 20 to 35°C.The lower thresholds of development (t0) were 11.86, 7.69, 12.34 and 10.66 °C for egg, larvae, pupae and pre- oviposition periods, respectively. The average of accumulated heat units required for development as 53.2, 314.7, 155.8 and 27.5 degree-days for egg, larvae, pupae and pre- oviposition period, respectively. The lower threshold of development (t0) for S. littoralis when fed on artificial diet to complete the generation was 10.3 °C. The average accumulated heat units required for the generation was 537.2 degree-days .The kind of food has non-significant for heat requirements.
|
|
| New Publications |
|
The Arab Scientists in Cooperation with The High Institute of Marine Research. Publish all the researches abstracts, which presented in The Regional Workshop on Marine Sciences and Natural Resources, Tishreen University, Lattakia, Syria, 25-26 May 2004.
|
| New Publications |
|
The Arab Scientists in Cooperation with The Egyptian Society for Biological Control of Pests . Publish all the researches abstracts, which presented in The First Arab Conference of Applied Biological Pest Control, Cairo, Egypt, 5-7 April 2004.
|
| Conferences, Fez |
The First International Symposium on Environnement protection for development Biotechnological aspects. Fez, December
15 – 17, 2004.
|
| Conferences, Syria |
|
The Second Syrian-Egyptian conference in the Agriculture and Food.
Agriculture Faculty, Al-Baath university, Homs, Syria. 25-28 April, 05
|
| Conference,Yemen |
|
Current Status of Plant Protection in Yemen and Future Strategy.
Faculty of Agriculture, Sana'a University, Sana'a, yemen. December 18-20/2004
|
| Conferences Canada |
|
The 9th International Conference of the Orthopterists’ Society
Canada, on August 14 19, 2005
|
| Conferences, Egypt |
|
The First Arab Conference on Applications of Biological Control of Pests in Arab Countries
|
| Workshop,Lebanon |
|
New Workshop
Middle-East Academy for Medicine of Ageing
First Annual Middle-East Age & Aging Meeting
8-11 April, 2004
|
| Publications |
Arab Society for Plant Protection (ASPP) in Cooperation with The Arab Scientists
Publish all the researches abstracts, which presented in the Eighth Arab Congress of
Plant Protection, held in Faculty of Agriculture, Omar Al-Mukhtar University, El-beida
City, Libya, October 12-16,2003
|
|
