ALI, A., ESSA, E., ABD EL-WAHAB, H., OODA, M. (2011). THERMAL CONSTANT AND DEGREE-DAY REQUIREMENTS FOR THE DEVELOPMENT OF THE EGGPLANT STEM BORER, EUZOPHERA OSSEATELLA TRIET. (LEPIDOPTERA: PYRALIDAE).. test, 89(3), 899-906. doi: 10.21608/ejar.2011.176625
ALI M. ALI; ESSA I. ESSA; HOREA A. ABD EL-WAHAB; MOHAMED OODA. "THERMAL CONSTANT AND DEGREE-DAY REQUIREMENTS FOR THE DEVELOPMENT OF THE EGGPLANT STEM BORER, EUZOPHERA OSSEATELLA TRIET. (LEPIDOPTERA: PYRALIDAE).". test, 89, 3, 2011, 899-906. doi: 10.21608/ejar.2011.176625
ALI, A., ESSA, E., ABD EL-WAHAB, H., OODA, M. (2011). 'THERMAL CONSTANT AND DEGREE-DAY REQUIREMENTS FOR THE DEVELOPMENT OF THE EGGPLANT STEM BORER, EUZOPHERA OSSEATELLA TRIET. (LEPIDOPTERA: PYRALIDAE).', test, 89(3), pp. 899-906. doi: 10.21608/ejar.2011.176625
ALI, A., ESSA, E., ABD EL-WAHAB, H., OODA, M. THERMAL CONSTANT AND DEGREE-DAY REQUIREMENTS FOR THE DEVELOPMENT OF THE EGGPLANT STEM BORER, EUZOPHERA OSSEATELLA TRIET. (LEPIDOPTERA: PYRALIDAE).. test, 2011; 89(3): 899-906. doi: 10.21608/ejar.2011.176625

THERMAL CONSTANT AND DEGREE-DAY REQUIREMENTS FOR THE DEVELOPMENT OF THE EGGPLANT STEM BORER, EUZOPHERA OSSEATELLA TRIET. (LEPIDOPTERA: PYRALIDAE).

Egyptian Journal of Agricultural Research
Article 7, Volume 89, Issue 3, September 2011, Pages 899-906    PDF (290.36 K)
Document Type: Original Article
DOI: 10.21608/ejar.2011.176625
Authors
ALI M. ALI1; ESSA I. ESSA1; HOREA A. ABD EL-WAHAB2; MOHAMED OODA2
1Department of plant protection , Faculty of Agriculture. Al- Azhar University, Nasr City, Cairo, Egypt.
2Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
Abstract
Developments of the egg-plant stem borer Euzophera osseatella Triet (Lepidpterra :Pyralidae) was studied at constant temperatures 15,20, 25 and 30C0 ±1 C0 . Development of immature stages was accelerated as the tested temperatures increased. Total developmental time averaged 201, 93.43, 57.2 and 48.17 days at15, 20, 25 and 30C0 respectively. Generation period ranged between 205.6 and 49.17 days depending on rearing temperature. Adult female survived slightly longer than male. Fecundity was higher at (15C0) than 30C0. Female deposited 134.4 eggs at 15 C0, while this number drastically decreased to 62.0 eggs at 30 C0. However, egg hatchability (%66.25) showed a reversed trend. Thermal constant or threshold of development (t0) and thermal requirements (K ) degree- day (DDs ) were estimated to be 7.3 C0,11.43 C0 and 5.9 C0 for eggs, larvae and pupae, respectively. Based on estimated preferred temperature30 C0, heat units (U.T. ) 82.85, 413.6 and 538.55 are required to compled the development of egg, larval and pupal stages. Development of one generation may acquire 931.22. degree-days.
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