Egyptian cotton leafworm Spodoptera littoralis development on artificial diet in relation to heat units requirements

تطور دودة ورق القطن المصرية على البيئة الصناعية وعلاقتها بالوحدات الحرارية المتراكمة
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 decreased as the temperatures increased from 20 to 35°C.The lower thresholds of development (to) 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 (to) 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 had non-significant on heat units requirements
Publication year 2005
Pages 199-209
Availability location معهد بحوث وقاية النباتات
Availability number
Organization Name
City القاهرة
serial title المجلة المصرية للبحوث الزراعية
ISSN 1110-6336
Author(s) from ARC
Agris Categories Pests of plants
AGROVOC
TERMS		 Developmental stages. Spodoptera littoralis. Temperature.
Publication Type Journal
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