FUMIGATION OF APPLES UNDER PLASTIC TARPAULINS WITH ETHYLENE DIBROMIDE TO CONTROL DIAPAUSING EUROPEAN RED MITE (ACARINA: TETRANYCHIDAE) EGGS

Abstract

AbstractOverwintering eggs of the European red mite, Panonychus ulmi (Koch), were killed on McIntosh and Red Delicious apples by 4½-h fumigation treatments with ethylene dibromide. Constant concentrations of 8 mg EDB/1. at 14 °C achieved 100% mortality, and absorption of the fumigant by the apples, the bins, and the chamber was determined so that the amount of fumigant for various size commercial loads could be calculated. Treatments increased scald on McIntosh but reduced it on Red Delicious. Taste and other qualities of the fruit were not affected.