Reproductive Performance of Bracon hebetor1 Females with More or Fewer than the Normal Number of Ovarioles2

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Abstract
After recording the daily egg production of Bracon hebetor Say females (Whiting stock No. 33) for 5 days, we dissected them to determine their number of ovarioles. Wasps with fewer than 4 ovarioles (1, 2, or 3) produced proportionately fewer eggs than their “normal” 4-ovariole sisters. In females with 5–9 ovarioles, egg production did not increase significantly. The supply of vitellogenic materials is a limiting factor. Individuals with a decrease in ovarioles were obtained by screening large samples of untreated stocks. Supernumerary ovarioles were induced by cold storage of fourth instars.

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