You are here.
Fifth Cover
Cork and bitter pit in fruit. See Part I.
Sooty blotch and flyspeck. These diseases are likely to be a problem from this time of the growing season through harvest, especially if rainfall is above normal. Refer to Part II: Diseases, Pests, and Natural Enemies.
Codling moth. If present, the second brood of codling moth can be controlled with broad-spectrum insecticides applied at 1,250- 1,300 and 1,550-1,600 degree days after biofix. In orchards with suspected organophosphate resistance, other choices include a high rate of Assail (3.5 ounces), Calypso (6.0 fluid ounces), Intrepid (16 fluid ounces), or Rimon (20 fluid ounces). If Rimon is used, start applications at 1,150-1,200 degree days and repeat again in 14-17 days. Thorough coverage is required to successfully control this brood of codling moth. It is recommended that at least 100 gallons per acre be used for the remainder of the season.
Fruit rots. White rot, black rot, and bitter rot all occur in Pennsylvania, but white rot is most common and causes the most loss. Warm, wet conditions favor the fruit rots during the summer months and at harvest. Refer to Part II: Diseases, Pests, and Natural Enemies.