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Abdel Aleem,, R. (2008). RATE OF DEVELOPMENT, THRESHOLD (ZERO) OF DEVELOPMENT AND THERMAL UNITS FOR DIFFERENT STAGES OF MEALYBUG, Icerya seychellarum (WESTWOOD) AT DIFFERENT DEGREES OF TEMPERATURE.. Journal of Plant Protection and Pathology, 33(5), 3713-3716. doi: 10.21608/jppp.2008.217967
R. Y. Abdel Aleem,. "RATE OF DEVELOPMENT, THRESHOLD (ZERO) OF DEVELOPMENT AND THERMAL UNITS FOR DIFFERENT STAGES OF MEALYBUG, Icerya seychellarum (WESTWOOD) AT DIFFERENT DEGREES OF TEMPERATURE.". Journal of Plant Protection and Pathology, 33, 5, 2008, 3713-3716. doi: 10.21608/jppp.2008.217967
Abdel Aleem,, R. (2008). 'RATE OF DEVELOPMENT, THRESHOLD (ZERO) OF DEVELOPMENT AND THERMAL UNITS FOR DIFFERENT STAGES OF MEALYBUG, Icerya seychellarum (WESTWOOD) AT DIFFERENT DEGREES OF TEMPERATURE.', Journal of Plant Protection and Pathology, 33(5), pp. 3713-3716. doi: 10.21608/jppp.2008.217967
Abdel Aleem,, R. RATE OF DEVELOPMENT, THRESHOLD (ZERO) OF DEVELOPMENT AND THERMAL UNITS FOR DIFFERENT STAGES OF MEALYBUG, Icerya seychellarum (WESTWOOD) AT DIFFERENT DEGREES OF TEMPERATURE.. Journal of Plant Protection and Pathology, 2008; 33(5): 3713-3716. doi: 10.21608/jppp.2008.217967

RATE OF DEVELOPMENT, THRESHOLD (ZERO) OF DEVELOPMENT AND THERMAL UNITS FOR DIFFERENT STAGES OF MEALYBUG, Icerya seychellarum (WESTWOOD) AT DIFFERENT DEGREES OF TEMPERATURE.

Article 9, Volume 33, Issue 5, May 2008, Page 3713-3716  XML PDF (360.62 K)
Document Type: Original Article
DOI: 10.21608/jppp.2008.217967
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Author
R. Y. Abdel Aleem,
Department of Economic Entomology & Pesticides, Fac. Of Agric., Cairo Univ., Giza- Egypt
Abstract
Different biological features of  Icerya seychellarum was studied under four different degrees of constant temperature on mango seedlings, Mangifera indica. Rate of development was 8.0, 2.3 and  1.9 days at 15oC   for egg, nymphal and adult stages, respectively, while it was 23.8 , 40 and 3.9 days for the same stages, at 33oC. Hypothetical threshold (zero) of development was 9.2, 10.4 and 12.4oC for egg, nymphal and adult stages, respectively. Mean thermal units was 85.5, 429.3 and 384.3 degree/ days for egg, nymphal and adult stages, respectively.
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