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Fertility life table parameters of different strains of Trichogramma spp. collected from eggs of the carob moth Ectomyelois ceratoniae
Author(s) -
POORJAVAD Nafiseh,
GOLDANSAZ Seyed H.,
HOSSEININAVEH Vahid,
NOZARI Jamasb,
DEHGHANIY Hossein,
ENKEGAARD Annie
Publication year - 2011
Publication title -
entomological science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 28
eISSN - 1479-8298
pISSN - 1343-8786
DOI - 10.1111/j.1479-8298.2011.00443.x
Subject(s) - biology , relative humidity , population dynamics , horticulture , botany , population , fecundity , physics , demography , sociology , thermodynamics
Fertility life table parameters were assessed for five populations (strains) of two Trichogramma species, T. embryophagum Hartig and T. principium Sugonyaev & Sorokina, collected from eggs of the carob moth Ectomyelois ceratoniae (Zeller) in Iranian pomegranate orchards. Four combinations of two constant temperatures (25°C, 30°C) and two relative humidity levels (50% RH, 70% RH) were used. The overall intrinsic rate of natural increase ( r m ) was significantly decreased with decreased relative humidity but was uninfluenced by temperature. The highest and lowest r m values were observed in T. embryophagum from Qum (0.34 ± 0.004) and T. embryophagum from Varamin (0.13 ± 0.01), respectively. Two‐way interaction analyses revealed that the strains had significantly different responses in their r m values at different temperatures and relative humidities. In general, r m values were significantly higher at 25°C and 70% RH than at 30°C and 50% RH. The Qum strain of T. embryophagum was the most promising candidate to be considered as a biocontrol agent against E. ceratoniae due to its high reproductive rate (0.27 ± 0.01) at conditions (30°C and 50% RH) similar to the actual climatic conditions in Iranian pomegranate orchards during the major part of the growing season.