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Population Dynamic of Aphids and Whitefly and Seed-Cotton Yield
as Influenced by Cotton Sowing Date.
- Said*, A. A. A.; Shaheen*, F.A.H.; Hamid**, A.M. And Ei¬zahi**, S.E.
- * Fac. Agric. Mansoura Univ.
- ** plant Prot. Res. Inst. Dokki, Cairo
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
Field experiments were conducted at cotton fields of Biala district, Kafr EI-Sheikh Governorate, Egypt to study the effect of sowing date of cotton Var. Giza 86 on the population densities of A. gossypii, B. tabaci and some associated predators and seed-cotton yield during 2003 and 2004 seasons. Plants sown early during March infested with the lowest means of aphids (124.39 and 116.70 / 100 leaves), and immature whiteflies (467.3 and 126.4 / 100 leaves) harbored the highest accumulative number of green bolls (159.1 and 191.4 / plant) during the scouting period of 20 weeks. and produced the highest seed-cotton yield (8.53 and 9.65 Kentar / feddan) in 2003 and 2004, respectively. On the contrary, plants sown in late April infested with the highest means of aphids (494.29 and 270.67 / 100 leaves) and immatures whiteflies (768.2 and 455.1 / 100 leaves), harbored the lowest accumulative number of green bolls (118.5 and 148.9 / plant) during the scouting period of 20 weeks and produced the lowest seed-cotton yield (5.96 and 6.73 Kentar / feddan) in 2003 and 2004, respectively .The plants sown in early April showed
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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.
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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.
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The First International Symposium on Environnement protection for development Biotechnological aspects. Fez, December
15 – 17, 2004.
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The Second Syrian-Egyptian conference in the Agriculture and Food.
Agriculture Faculty, Al-Baath university, Homs, Syria. 25-28 April, 05
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Current Status of Plant Protection in Yemen and Future Strategy.
Faculty of Agriculture, Sana'a University, Sana'a, yemen. December 18-20/2004
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The 9th International Conference of the Orthopterists’ Society
Canada, on August 14 19, 2005
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The First Arab Conference on Applications of Biological Control of Pests in Arab Countries
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New Workshop
Middle-East Academy for Medicine of Ageing
First Annual Middle-East Age & Aging Meeting
8-11 April, 2004
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| 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
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