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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Effect of temperature and relative humidity on the development and fecundity of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae)
Bulletin of Entomological Research, Volume 102, No. 1, Year 2012
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Description
The spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), is one of the most important insect pests attacking maize and sorghum in Ethiopia. Recent studies have indicated that the pest is spreading to new locations where it was not reported before. In the current study, laboratory investigations were carried out to determine the combined effect of different levels of relative humidity and temperature regimes on the development and fecundity of C. partellus, as these physical factors are known to play an important role in the life cycle of insects and adaptability to local climate. Developmental time, longevity, potential fecundity and realized fecundity of C. partellus were measured under controlled conditions. Three temperature regimes (22°C, 26°C and 30°C) and three relative humidity levels (40%, 60% and 80%) were tested. It was found that temperature, relative humidity (RH) and their interaction significantly affected the developmental time, adult longevity, potential fecundity and realized fecundity of the pest. Developmental time was inversely related to temperature. Mean duration of C. partellus life cycle was 70.2 days at 22°C and 80% RH, whereas it took only 26.5 days to complete its life cycle at 30°C and 40% RH. Male and female longevity were similar in most cases. The adult life span ranged between 6.9-11.1 days at 22°C and 3.1-7.2 days at 30°C for different levels of relative humidity. The most suitable conditions for C. partellus development and fecundity were 26-30°C temperatures regimes and 60-80% RH levels. © Copyright Cambridge University Press 2011.
Authors & Co-Authors
Tamiru, Amanuel
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Getu, Emana
Ethiopia, Addis Ababa
Addis Ababa University
Jembere, Bekele
Ethiopia, Addis Ababa
Addis Ababa University
Bruce, Toby J.A.
United Kingdom, Harpenden
Rothamsted Centre for Sustainable Pest and Disease Management
Statistics
Citations: 50
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1017/S0007485311000307
ISSN:
00074853
Study Locations
Ethiopia
Participants Gender
Male
Female