EFFECT OF FOOD SOURCES ON THE LONGEVITY AND FECUNDITY OF PHOLETESOR ORNIGIS (WEED) (HYMENOPTERA: BRACONIDAE)

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Abstract

Abstract The fecundity of first-generation adult Pholetesor ornigis (Weed) increased when individuals were confined with flowers of creeping "Charlie" ( Glechoma hederacea L.), dandelion ( Taraxacum officinale Weber), and apple ( Malus domesticus L.), but not with blossoms of chickweed [ Stellaria media (L.) Cyrillo] or Shepherd’s purse [ Capsella bursa-pastoris (L.) Medic]. Longevity of P . ornigis was little affected. The fecundity of second-generation P . ornigis increased when individuals were confined with terminal leaves of apple with honeydew of the aphid Aphis pomi DeGeer, but not when confined with terminal leaves without honeydew or with flowers of round-leaved mallow ( Malva neglecta Wallr.) or red clover ( Trifolium pratense L.). Longevity of P . ornigis adults also increased when they were provided with aphid honeydew. There were significant differences between the total number (oviposited and ovarian) of eggs produced by second-generation females given different food sources. Those given aphid honeydew oviposited a greater proportion of their eggs than those confined with apple leaves without honeydew or with flowers of M . neglecta or T . pratense , Adult P . ornigis fed an aqueous solution of honey (50:50, v/v) lived longest and produced more eggs than those provided with any other food source.

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