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Biological studies on Eretmocerus longipes Compere (Hym., Aphelinidae), a parasitoid of Aleurotuberculatus takahashi David et Subramaniam (Hom., Aleyrodidae) in the laboratory
Author(s) -
Sengonca C.,
Liu B.
Publication year - 1998
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1998.tb01485.x
Subject(s) - aphelinidae , biology , parasitoid , whitefly , botany , zoology , toxicology , biological pest control
Experiments on the duration of development, the longevities on different diets at constant temperatures, as well as the influence of constant temperatures, relative humidities and photoperiods, on the emergence of Eretmocerus longipes Compere (Hym., Aphelinidae), a parasitoid of the citrus whitefly, Aleurotuberculatus takahashi David et Subramaniam (Hom., Aleyrodidae), were conducted separately under laboratory conditions in Fuzhou, Fujian Province, China in 1996. The duration of the development of E. longipes from egg to adult decreased significantly as a result of an increase in temperature, ranging from 56.7 days at 15 °C to 11.4 days at 35 °C. Fhe longevities of E. longipes were strongly interaffected by temperatures and diets being 7.9 days at 20 °C, 4.5 days at 25 °C, and 2.8 days at 30 °C on a honey water diet, compared to 3.1 days at 20 °C, 1.2 days at 25 °C and 0.9 days at 30 °C without any food provision. However, no statistical difference between the provided diets of honey water or 3rd instars of the whitefly was found in longevities at the same temperature. With temperature increases in steps of 15–30 °C, the rate of emergence of the parasitoid increased from 44 to 89%. Relative humidity (RH) also significantly affected the rate of emergence of the parasitoid, which varied from 20.4% at 35% RH to 76.5% at 95% RH. On the other hand, the rate of emergence of the parasitoid was not significantly different at different photoperiods, amounting to 74.31% under total exclusion of light and 75.51% under the full light condition.