ECOLOGICAL STUDIES ON THE BLACK CUTWORM AGROTIS IPS/LON (Hiifn.) IN COTTON FIELDS
AYMAN ABOUL-HOSSIN ABDEL-HALEM HAMOUDA;
Abstract
The black cutworm Agrotis ipsilon (Htifn.) (Lepidoptera: Noctuidae) is the most destructive insect pests in Egypt. Knowledge about population dynamics, life history, damage assessment, reproduction rates and life table parameters still not quite enough. The present field study was carried out with the endeavor of contributing some knowledge concerning certain ecological aspects.
Monitoring the changes in the population density of adult moths was carried out and the approximated number of field generations of moths in relation to both certain weather factors and yield loss which may play an important role in governing cotton yield in particular. Light traps were distributed in two different locations i.e. Shalakan, Qalyubyia Governorate and Sers El-Lian, Menofyia Governorate.
The field studies were carried out in Novartis Agrochemical-research Station in Kaha (Qalyubyia Governorate) the following items were studied:
1- Zero of development
1-1- Developmental and mortality rates:
The larval development rate decreased from 76.7 days on l5°C to 18.01 at 30°C. While the pupal stage required 51.73, 24.79,
16.3 and 12.1 days at 15, 20,25 and 30°C, respectively.
The total life span from egg to adult stage varied from
193.78, 66.97, 44.04 and 32.8 days for 15, 20, 25 and 30°C, respectively.
Monitoring the changes in the population density of adult moths was carried out and the approximated number of field generations of moths in relation to both certain weather factors and yield loss which may play an important role in governing cotton yield in particular. Light traps were distributed in two different locations i.e. Shalakan, Qalyubyia Governorate and Sers El-Lian, Menofyia Governorate.
The field studies were carried out in Novartis Agrochemical-research Station in Kaha (Qalyubyia Governorate) the following items were studied:
1- Zero of development
1-1- Developmental and mortality rates:
The larval development rate decreased from 76.7 days on l5°C to 18.01 at 30°C. While the pupal stage required 51.73, 24.79,
16.3 and 12.1 days at 15, 20,25 and 30°C, respectively.
The total life span from egg to adult stage varied from
193.78, 66.97, 44.04 and 32.8 days for 15, 20, 25 and 30°C, respectively.
Other data
| Title | ECOLOGICAL STUDIES ON THE BLACK CUTWORM AGROTIS IPS/LON (Hiifn.) IN COTTON FIELDS | Other Titles | دراسات بيئية على الدودة القارضة السوداء فى حقول القطن | Authors | AYMAN ABOUL-HOSSIN ABDEL-HALEM HAMOUDA | Issue Date | 2001 |
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