The Ovicidal Action of Parathion in Control of the Peach Tree Borer1

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Abstract
Over 70% of the eggs of the peach tree borer on the trunk are deposited within 6 inches of the soil level. The ovicidal action of bark residues was found to be higher initially and to persist longer than that of leaf residues. A single parathion spray was effective for over 13 days following application. Exposures of 2-6 days were required to cause mortality of eggs deposited on sprayed surface. In all cases where mortality occurred, embryos developed apparently normally to the point of hatching but failed to emerge from the chorion.

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