The results of these two studies conducted at BARC indicate that there may be significant differences in parasitism rates of H. pennsylvanicus in different years and that planting date could potentially be a factor influencing parasitism rates of squash bugs.
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Annual and Seasonal Changes in Parasitism Rates by <i>Hadronotus Pennsylvanicus</i> (Hymenoptera: Scelionidae) on the Squash Bug <i>Anasa Tristis</i> (Hemiptera: Coreidae) in Squash Fields: Implications for Augmentative Releases.
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