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 Photo Library: Insects Palestriped Flea Beetle The Palestriped flea beetle, Systena blanda (Melsheimer) This insects has recently become a serious pest of seedling sunflower in central South Dakota. The sunflower plant is most sensitive to palestriped flea beetle injury from emergence (V E) through the four leaf stage (V 4). Significant stand losses may result from heavy palestriped flea beetle feeding. Control is recommended when 20% of the seedling stand is injured. This economic threshold is a guideline based on published hail injury data that predicts potential yield loss relative to seedling stand loss. Research has shown that insecticides treatments may provide up to 75% control of adults.
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